principles of scientific writing for an international audience

213
Successful Scien+fic Wri+ng Eugene Elbert, MS (Johns Hopkins University, U.S.) Special thanks to : Paul Siegel MD, MPH 9F10 August 2012

Upload: manderschulte

Post on 20-Dec-2014

321 views

Category:

Documents


0 download

DESCRIPTION

 

TRANSCRIPT

Page 1: Principles of Scientific Writing for an International Audience

Successful(Scien+fic(Wri+ng(Eugene(Elbert,(MS((Johns(Hopkins((

University,(U.S.)(Special(thanks(to(:(Paul(Siegel(MD,(MPH(

9F10(August(2012(

Page 2: Principles of Scientific Writing for an International Audience

Biological(Threat(Reduc+on(Program((of(the(

Defense(Threat(Reduc+on(Agency((DTRA)(

(

2(

Page 3: Principles of Scientific Writing for an International Audience

Biological(Threat(Reduc+on(Program((

•  Consolidate(especially(dangerous(pathogens((EDPs)(into(one(or(two(safe,(secure(central(reference(laboratories(or(repositories(

•  Build(and(sustain(longFterm(partnerships(through(interna+onal(scien+fic(engagement(and(coopera+on(

•  Improve(capacity(to(detect,(diagnose(and(report(outbreaks(and(poten+al(pandemics(by(providing(training(to(personnel(of(the(appropriate(facili+es(

(

3(

Page 4: Principles of Scientific Writing for an International Audience

Biological(Threat(Reduc+on(Program((BTRP)(

•  EDPs(for(human(and(animal(health(include:(o  Avian(and(pandemic(influenza((influenza(viruses)(o  CrimeanFCongo(Hemorrhagic(Fever((CCHF(virus)(o  Anthrax((Bacillus(anthracis)(o  Brucella((Brucella(species)(o  Tularemia((Francisella(tularensis)(o  Botulism((Clostridium(botulinum)(o  Tick(Borne(Encephali+s((TBE(virus)(o  Plague((Yersinia(pes6s)(o  Foot(and(Mouth(Disease((FMD)(o  Glanders(o  Newcastle(Disease(Virus(o  Rinderpest(o  Pox(viruses((goat(and(sheep(pox)(o  Swine(fevers((African(and(Classical(Swine(Fever)(

•  Although( the( BTRPFprovided( training( focus( on( these( pathogens,(the(knowledge(and(skills(learned(and(prac+ced(are(applicable(to(a(broad( range( of( other( infec+ous( diseases( and( public( and( animal(health(concerns(

(( 4(

Page 5: Principles of Scientific Writing for an International Audience

BTRPFProvided(Training(

Courses(include:((•  Disease(recogni+on;((•  Laboratory(equipment(use(and(maintenance;((•  Biosafety(and(security;((•  Laboratory(safety;((•  Laboratory(quality(systems;((•  Respiratory(protec+on(program;((•  Purchasing(and(inventory(control;((•  Introduc+on(to(microbiology;((•  Introduc+on(to(molecular(biology;((•  Introduc+on(to(immunology/serology;((•  Diagnos+c(assays(for(specific(EDPs;((•  Laboratory(management;((•  Sample(collec+on(and(processing;((•  Basics(of(epidemiology;(and(others(

6(

Page 6: Principles of Scientific Writing for an International Audience

BTRP(Summary(

•  Enhancement(of(exis+ng(surveillance(capacity(through(expansion(of(generic(skills(

•  Development(of(capacity(for(rapid(detec+on((PCR(and(ELISA),(which(contributes(to(public(health(

•  Improved(biosafety(and(biosecurity(for(laboratory(personnel(

•  BTRPFprovided(training(complements(the(Ministry(training(requirements(for(specialists(

(8(

Page 7: Principles of Scientific Writing for an International Audience

Successful(Scien+fic(Wri+ng(

9(

Page 8: Principles of Scientific Writing for an International Audience

Introduc+on(

Objec+ves(of(the(workshop:((•  To((introduce(basic(concepts(of(scien+fic(approach(•  To(detail(the(structure(and(format(of(scien+fic(papers.(•  To(compare(examples(of(different(research(designs.(•  To(examine(components(of(a(scien+fic(paper.(•  To(cri+cally(examine(published(examples(of(scien+fic(wri+ng.(

•  To(apply(new(wri+ng(skills(to(draging(an(abstract.(•  To(learn(about(the(submission(process(for(publica+ons,(funding(proposals,(and(presenta+ons(

10(

Page 9: Principles of Scientific Writing for an International Audience

Why(do(we(publish?(

•  Presen+ng(research(•  Reaching(global(scien+fic(community(

•  Advancing(science(•  Educa+on(•  Funding(and(credibility((

11(

Page 10: Principles of Scientific Writing for an International Audience

12(

Page 11: Principles of Scientific Writing for an International Audience

Repor+ng(Scien+fic(Research(

•  Hypothesis(or(research(ques+on(•  Planned(research(•  Ethics((

– Plagiarism(– Misuse(of(data(and(informa+on(– Conflict(of(interest(–  Integrity(– Human(subject(research(

((

13(

Page 12: Principles of Scientific Writing for an International Audience

Process(of(scien6fic(wri6ng(

Hypothesis(

Study(plan(

Experiment(

Data(processing(Results(genera+on(

Having((

journal,(

audience((

in(mind(

Wri+ng((ar+cle(

Submiing(

14(

Page 13: Principles of Scientific Writing for an International Audience

General(Guidelines(for(Scien+fic(Papers:(Style(and(Content(

EASE(guidelines(

•  Complete,(concise(and(clear(

•  For(effec+veness(of(interna+onal(coopera+on(all(publica+ons(should(be:(

•  COMPLETE,(CONCISE(AND(CLEAR!(

•  IMPORTANT((

15(

Page 14: Principles of Scientific Writing for an International Audience

•  Do(not(include(irrelevant(informa+on(•  Informa+on(should(not(be(repeated(•  Include(only(necessary(tables(and(figures(•  Cap+ons(–(informa+ve(but(concise(•  Delete(redundancies(•  Define(abbrevia+on(at(first(use(•  Do(not(overFgeneralize(•  Numbers(for(all(numerals(

General(Guidelines(for(Scien+fic(Papers:(Style(and(Content(

16(

Page 15: Principles of Scientific Writing for an International Audience

Content(

•  Study(should(be(planned(in(advance(•  The(journal(and(the(audience(should(be(chosen(

•  Informa+on(should(be(organized(•  All(the(components(of(scien+fic(ar+cle(should(be(present(and(sa+sfy(the(guidelines(for(a(chosen(journal(

17(

Page 16: Principles of Scientific Writing for an International Audience

Repor+ng(Guidelines:(Content(

•  Dis+nguish(your(original(ideas(•  Paraphrase(text(from(other(sources(•  Proper(terms((plant(community(vs.(phytocoenosis)(•  Define(every(uncommon(term((•  Avoid(ambiguity(•  Be(clear(what(you(regard(as(100%(when(repor+ng(%(•  SI(units((interna+onal(system(of(units;(metric)(•  Decimal(point((•  Remember(that(the(text(will(be(read(by(foreigners(

18(

Page 17: Principles of Scientific Writing for an International Audience

•  Make(posi+ve,(objec+ve(asser+ons,(directly(supported(by(the(results,((with(necessary(qualifica+ons(and(caveats(

•  Don’t(oversell:((“This(result(clearly(proves(that(the(neural(network(approach(is(superior(and(will(revolu+onize(research(methods”.(

•  Don’t(base(substan+al(claims(on(unpublished(data(or(on(“experience”(without(objec+ve(suppor+ng(evidence.(((

(•  If(you(rely(on(a(reference(to(draw(a(conclusion,(be(sure(the(reference(supports(the(idea,(and(say(where(the(support(may(be(found(in(the(reference.(

Repor+ng(Guidelines:(Content(

19(

Page 18: Principles of Scientific Writing for an International Audience

A(Dic+onary(of(Useful(Research(Phrases(((•  "It(has(long(been(known..."(

•  "It(is(believed(that..."(•  "It(is(generally(believed(

that..."(

•  "A(sta+s+cally(oriented(projec+on..."(

•  “Typical(results(are(shown”(•  “Obviously,(we(will(need(

addi+onal(studies”(•  “Authors(thanks(Joe(in(

conduc+ng(experiment(and(George(for(helpful(comments”(

•  I(didn't(look(up(the(original(references(

•  I(think(•  My(friends(think(so,(too(

(

•  Wild(guess(

•  Best(results(are(shown(•  I(don’t(understand(anything((

•  Joe(did(the(work(and(George(explained(it(to(me(

(

20(

Page 19: Principles of Scientific Writing for an International Audience

Example(

“In(order( to(provide(analy+c(control(during( forensicFchemical( inves+ga+on,( it( is( customary( to( use( highly(sensi+ve(and(specific(analysis(methods.(Very(popular(in( the( prac+ce( of( chemicFtoxic( studies( is( the( TLC(method(in(view(of(its(accessibility,(ease(of(conduc+ng(and(expressiveness.(Due(to(the(possibility(of(changing(not( only( sorbents( but( also( solvents,( it( is( possible( to(quickly(solve(the(problems(of(separa+on”(

21(

Page 20: Principles of Scientific Writing for an International Audience

Repor+ng(Guidelines:(Text(Structure(

•  Simple(sentences,(should(not(be(very(long(•  Avoid(passive(voice(•  Text(should(be(cohesive,(logically(organized(•  Each(paragraph(should(start(with(a(topic(sentence(•  Use(text(tables(•  Make(figures(and(tables(understandable(by(themselves(•  Explain(your(figures(and(charts,(and(jus+fy(their(inclusion.((Do(not(just(show(them(with(no(stated(reason.(

22(

Page 21: Principles of Scientific Writing for an International Audience

Text(tables(Original(sentence:(•  Iron(concentra+on(means((±standard(devia+on)(were(as(follows:(11.2±0.3(mg/dm3(in(sample(A,(12.3±0.2(mg/dm3(in(sample(B,(and(11.4±0.9(mg/dm3(in(sample(C.(

Modified:(•  Iron(concentra+on(means((±standard(devia+on,(in(mg/dm3)(were(as(follows:(•  sample(B((12.3±0.2(•  sample(C((11.4±0.9(•  sample(A((11.2±0.3(

23(

Page 22: Principles of Scientific Writing for an International Audience

Replace(phrases(with(a(single(word(

•  Considering(this(fact(•  In(the(rela+on(to((•  Exceeding(number(

•  In(the(previous(case(•  In(the(absence(•  In(large(number(of(cases(

24(

Page 23: Principles of Scientific Writing for an International Audience

Passive(Voice(

“Have(you(ever(been(told(to(use(passive(voice”(( ( ( (or(

“Did(anyone(tell(you(to(use(passive(voice”(Examples:*•  “James(Watson(was(awarded(the(Nobel(Prize(for(discovering(the(molecular(structure(of(DNA.“(vs.(

•  "The(Nobel(CommiSee(awarded(James(Watson(the(Nobel(Prize(for(discovering(the(molecular(structure(of(DNA."(

25(

Page 24: Principles of Scientific Writing for an International Audience

Passive(voice(

Nobody(takes(responsibility(in(passive(voice:(

(

“Mistakes(were(made(during(the(experiment”(

vs.(We(made(mistakes(during(the(experiment(

(

“It(is(shown(in(the(table”(vs.*The(table(shows((

(26(

Page 25: Principles of Scientific Writing for an International Audience

Example(

Common(dysfunc+on(of(the(immune(system(was$shown$in(the(trials(on(humans(and(animals(__________________________________(

Trials(on(humans(and(animals(show(a(common(dysfunc+on(of(the(immune(system(

27(

Page 26: Principles of Scientific Writing for an International Audience

Correct(Use(of(Passive(Voice(

•  When(the(ac+on(is(more(important(than(the(agent(of(it((as(in(Materials(and(Methods)(

(

•  In(order(to(emphasize(somebody(other(than(the(ac+ng((agent(

(

•  When(the(agent(is(unknown(

28(

Page 27: Principles of Scientific Writing for an International Audience

Repor+ng(Guidelines:(Language(

•  Use(commonly(known(words,(but(not(idioma+c(expressions(

•  Define(abbrevia+ons((avoid(them(in(abstract)(

•  Spelling((•  Past(tense(in(body,(present(in(general(statements(

•  Refer(to(the(author(as(“we”(or(“I”(not(“the(author”(

29(

Page 28: Principles of Scientific Writing for an International Audience

Repor+ng(Guidelines:(Language(

Transforma2on*of*verbs*into*nouns*(

Obtained(es+mates(–(es+mated(

Gained(improvementF(improved(

Showed(growth(–(grew(

Made(a(decision(–(decided(

(

(30(

Page 29: Principles of Scientific Writing for an International Audience

Common(Fallacies(in(Wri+ng ((

•  Non$Causa$Pro$Causa*Fallacies*—*No*Cause*for*Cause*

•  Asempts(to(establish(a(causal(rela+onship(–  Cum(Hoc,(Ergo(Propter(Hoc((

–  Post(Hoc,(Ergo(Propter(Hoc((–  The(Regression(Fallacy((–  Texas(Sharpshooter(Fallacy(

31(

Page 30: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng($Cum$Hoc,$Ergo$Propter$Hoc*—*With*This,*Therefore*

•  African(American(popula+on(is(more(likely(to(experience(metabolic(consequences(of(Chronic(Kidney(Disease((CKD)(before(reaching(the(eGFR(<60(ml/min(threshold(…(that(these(observa+ons(support(a(need(to(adapt(clinical(prac+ce(guidelines(shiging(screening(for(CKD(to(a(higher(eGFR(threshold(specifically(for(African(Americans((1)(

(•  The(assump6on(that(the(measured(clinical(parameters(in(this(

representa6ve(popula6on(are(physiologically(linked(to(CKD(in(African(Americans(is(simplis6c(and(ignores(the(effects(of(a(combina6on(of(gene6c(and(physiologic(adapta6ons(superimposed(on(a(background(of(social(and(environmental(factors(that(account(for(minority(health(dispari6es((2)(

(•  Lesson:*Adjustment(for(possible(confounders(and(other(sources(of(

bias(*

32(

Page 31: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng($Post$Hoc,$Ergo$Propter$Hoc*—*AAer*This,**Therefore* *Because*of*This**

•  “Since(that(event(followed(this(one,(this(event(must(have(caused(that(one.”(It(also(is(referred(to(as(“false(cause”(or(“coincidental(correla+on.”(

•  7(women(in(California(developed(ovarian(cysts(taking(the(new(mul+phasic(oral(contracep+ve(pills(which(led(to(case(series(report(and(media(prin+ng(the(story([1].((

•  No(associa6on(was(shown(in(followYup(studies([2]((•  Lesson:*Checking(for(possible(confounders,(conduc+ng(valida+on(studies(before(jumping(to(conclusions,(repor+ng(on(it(in(wri+ng(

33(

Page 32: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(*Texas*Sharpshooter*Fallacy**

*

((

•  In(medical(research,(this(fallacy(occurs(when(inves6gators(select(certain(data(to(demonstrate(a(causeYeffect(rela6onships.(

34(

Outbreak(foci?(

Page 33: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(*The*Art*of*Argumenta$

– Argumentum$ad$Ignoratum*(Appeal*to*Ignorance):(Absence(of(evidence(is(not(evidence(of(absence(

* Width*of*Confidence*Interval(±w)* Sample*Size(n)*

0.01( 9612(

0.02( 2403(

0.03( 1068(

0.05( 384(

0.10( 96(

0.15( 43(Sample*sizes*required*to*es2mate*a*true*prevalence*of*0.50*with*95%*confidence*intervals*of*different*widths*(±w)*

(Lesson:*Making(sure(that(the(sample(size(is(large(enough.(Recognizing(beneficence(and(nonFmaleficence(

35(

Page 34: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(

$Argumentum$ad$Verecundiam*(Appeal*to*Authority):*Users(of(this(fallacy(ogen(call(upon(the(published(works(of(others(to(bolster(their(arguments,(without(ques+oning(the(accuracy,(reliability,(or(validity(of(those(sources(•  Quote(from(an(editor(as(a(condi+on(for(publica+on(highlights(

the(problem:(“you(cite(Leukemia([once(in(42(references].(Consequently,(we(kindly(ask(you(to(add(references(of(ar6cles(published(in(Leukemia(to(your(present(ar6cle”((1)(

•  Editors'(incen+ve(to(inflate(impact(factors(through(selfFcita+on(

•  Survey(found(that(having(a(tenure(posi6on(also(increased(coercion(

•  Lesson:((Being(true(to(your(work(

36(

Page 35: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng($Argumentum$ad$An;quitatem*(Appeal*to**Tradi2on*or*History)((

“(Talking(about(acupuncture)(I(think(it(is(insul+ng(to(say(that(Chinese(people(would(carry(on(with(some(sort(of(mys+cal(belief(when(it(didn’t(work”(

“Well,(you(know(–(acupuncture(is(one(of(those(amazing(things.(I(mean(it(has(been(around((for(several(thousand(years(.(.(.(there(is(a(huge(amount(of(validity(to(what(it(represents,((and(there(has(to(be(–(or(it(wouldn’t(have(survived(such(a(long(+me(“((Lesson:((Not(making(unsupported(claims(

37(

Page 36: Principles of Scientific Writing for an International Audience

7/28/2012(

•  Argumentum$ad$Populum*(Appeal*to*the*People*or*Popularity)((

•  4(from(5(den+sts(recommend(sugarFfree(“Trident”“(chewingFgum!(

•  The(adver+sement(“forgot”(to(men+on(“If(pa+ents(INSIST(to(use(chewingFgum”.(They(also(hid(each(5th(den+st(recommended(to(avoid(the(use(of(chewingFgum.(

•  «Thus(based(on(the(assessment(of(leading(Russian(clinics(“Sangviri+n”(is(one(of(the(effec+ve(modern(an+microbial(drug(of(local(and(commonF(resorp+ve(ac+on(for(preven+on(and(treatment(of(different(infec+ous(diseases([14–17].»(

Fallacies(in(wri+ng ((

Page 37: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(Myths*of*Beneficence**An(analysis(of(60(adver+sements(that(had(appeared(in(the(Bri+sh(Medical(Journal(between(1999(and(2001(demonstrated(that(drug(adver+sing(uses(strong(imagery(to(fabricate(mythical(associa+ons(between(medical(condi+ons(and(branded(drugs,(and(that(drug(adver+sing(manipulates(readers’(percep+ons(by(subtle(appeal(to(ancient(and(modern(mythological(founda+ons(of(humanism(and(Western(psychology.(( 39(

Page 38: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(

False*Dichotomy((This(is(also(called(a(false(dilemma,(an(eitherYor(fallacy,(fallacy(of(false(choice,(or(blackYandYwhite(thinking.((

Most(wideFspread(false(dichotomy(in(scien+fic(repor+ng:(((Sta+s+cal(significance(

P(=(0.049(vs.(P(=(0.051(

(

40(

Page 39: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(Essen2alism((Some(argument(in(print(or(spoken(word,(some(“essen+al(feature”(is(proposed(as(a(defining(characteris+c(of(an(otherwise(complex(issue(or(larger(problem(

(Each(scien+fic(specialty(looks(at(disease(differently.(For(example,(cancer(from(the(perspec+ve(of(a(general(surgeon,(a(pathologist(or(an(acupuncturist(are(completely(different.(((Lesson:(To(be(aware(of(specialized(terminology(and(body(of(knowledge(when(repor+ng(

41(

Page 40: Principles of Scientific Writing for an International Audience

Fallacies(in(Wri+ng(

42(

Редукционизм$Efforts(to(simplify(the(problem(to(the(simple(rela+ons(((O’Connor(et(al.(2011):(“Reduc+onist(methods(of(disease(control(involve(the(removal(of(infec+on(or(the(infec+ous(agent,(implemen+ng(barriers(to(direct(and(indirect(transmission(or(by(increasing(inherent(or(acquired(immunity(to(the(infec+ous(agent.(However,(for(those(diseases(which(evade(such(methods(of(conven+onal(control,(a(more(comprehensive(understanding(of(the(complex(interac+ons(amongst(biological((agent(and(host(s)),(environmental,(economic(and(social(factors(which(can(affect(the(emergence(and(spread(of(an(infec+ous(disease(is(required.”(

Page 41: Principles of Scientific Writing for an International Audience

Things(to(avoid:(•  Plagiarism((•  Fishing(expedi+ons(–(research(must(be(hypothesis(driven(•  Do(not(plan(your(study(in(order(to(use(your(results(to(pool(

evidence(against(the(same(problem((e.g.(metaFanalyses.((•  Do(not(fail(to(take(into(account(heterogeneity,(uncertainty(

and(dependence(•  Do(not(fail(to(have(a(robust(exploratory(data(analysis((EDA)(

before(proceeding(into(any(confirmatory(tes+ng((John(Tukey(teachings)(

•  Do(not(discount(the(importance(of(internal(and(external(validity(when(interpre+ng(results(

•  Do(not(underes+mate(the(sta+s+cs.((The(absence(of(evidence(is(not(the(evidence(of(absence(–(your(study(may(not(have(enough(power(to(detect(anything(unless(you(have(large(numbers(

43(

Page 42: Principles of Scientific Writing for an International Audience

Things(that(annoy(reviewers(

–  Poor(English(–  Repe++on(–  Lack(of(structure(in(the(text(–  Sentences(that(are(too(convoluted(and(long((–  Lack(of(asen+on(to(detail((a(premature(drag(with(typographical(errors,(etc.)(

– Not(well(thought(out(statements((make(each(word(count)(

– Obscure(methods(or(not(well(described(– Oversta+ng(the(results(–  Too(long(of(a(paper(

44(

Page 43: Principles of Scientific Writing for an International Audience

Repor+ng(Guidelines:(Structure(•  IMRaD(standard((Introduc+on,(Methods,(Results,(and(

Discussion)(•  Design(Specific(–(EQUATOR(network(•  Journal(Fspecific(•  General:(

–  Title(Page(–  Conflict(of(Interest(No+fica+on(Page(–  Abstract(–  Introduc+on(– Methods(–  Results((–  Discussion(–  References(

45(

Page 44: Principles of Scientific Writing for an International Audience

Standardizing(Health(Repor+ng(

EQUATOR((Enhancing(Quality(and(Transparency(of(Health(Research)(network:(

“Too(oaen,(good(research(evidence(is(undermined(by(poor(quality(repor6ng”(

•  Raising(awareness(of(the(crucial(importance(of(good(repor+ng(of(research((

•  Becoming(the(recognized(global(center(providing(resources,(educa+on(and(training(rela+ng(to(the(repor+ng(of(health(research(and(use(of(repor+ng(guidelines(

•  Assis+ng(in(the(development,(dissemina+on(and(implementa+on(of(repor+ng(guidelines(

•  Monitoring(the(status(of(the(quality(of(repor+ng(across(health(research(literature(

•  Conduc+ng(research(rela+ng(to(the(quality(of(repor+ng(((

46(

Page 45: Principles of Scientific Writing for an International Audience

Guidelines(for(Repor+ng(Common(Study(Types(

•  CONSORT(–(Consolidate(Standards(of(Repor+ng(Trials(

•  STROBE(–(Strengthening(the(Repor+ng(of(Observa+onal(studies(

•  STARD(–(Standards(for(repor+ng(of(Diagnos+c(Accuracy(

•  QUOROM(–(Quality(of(Repor+ng(of(MetaFanalyses((under(CONSORT)(

47(

Page 46: Principles of Scientific Writing for an International Audience

Example(–(STROBE(checklist ((Item No Recommendation

Title and abstract 1 (a) Indicate the study’s design with a commonly used term in the title or the abstract (b) Provide in the abstract an informative and balanced summary of what was done and what was found

Introduction Background/rationale 2 Explain the scientific background and rationale for the

investigation being reported Objectives 3 State specific objectives, including any prespecified

hypotheses Methods Study design 4 Present key elements of study design early in the paper Setting 5 Describe the setting, locations, and relevant dates,

including periods of recruitment, exposure, follow-up, and data collection

Participants 6 (a) Cohort study—Give the eligibility criteria, and the sources and methods of selection of participants. Describe methods of follow-up Case-control study—Give the eligibility criteria, and the sources and methods of case ascertainment and control selection. Give the rationale for the choice of cases and controls Cross-sectional study—Give the eligibility criteria, and the sources and methods of selection of participants (b) Cohort study—For matched studies, give matching criteria and number of exposed and unexposed Case-control study—For matched studies, give matching criteria and the number of controls per case

48(

Page 47: Principles of Scientific Writing for an International Audience

Study(Designs(in(Public(Health(

Experimental*(Interven2onal)*Studies* Observa2onal*Studies*

Randomized(Trials( Case(reports(

Community(Trials( Case(Series(

Therapeu+c/Preven+ve(Trials( CrossFsec+onal(Studies(

Surveillance((

Cohort(Studies((

CaseFControl(

Descrip+ve(

Analy+c(

49(

Page 48: Principles of Scientific Writing for an International Audience

Observa+onal(Descrip+ve(Studies(

•  Case(Reports(–(detailed(presenta+ons(of(a(single(case(or(a(handful(of(cases.((“Normal(Plasma(Cholesterol(in(an(88FYearFOld(Man(Who(Eats(25(Eggs(a(

Day(—(Mechanisms(of(Adapta+on”([Kern(J,(NEJM(1991;(324:896–899](

•  Case(Series(–survey(of(a(group(of(individuals(with(a(par+cular(disease(performed(at(a(single(point(of(+me.(“Pneumocy+s(pneumonia:(Los(Angeles”([MMWR(Morbidity(and(

Mortality(Weekly(Report(1981;30:250Y252](

(

(50(

Page 49: Principles of Scientific Writing for an International Audience

CrossFSec+onal(Studies(

•  Describes(health(of(popula+ons((both(exposed(and(nonFexposed)(

•  Iden+fies(prevalent(cases(•  Finds(associa+on,(not(causa+on((•  BestFsuited(for(lisle(disability,(preFsymptoma+c(studies(

•  Surveys(•  Good(for(planning(health(care(

– Na+onal(Health(Surveys(are(a(good(example(

51(

Page 50: Principles of Scientific Writing for an International Audience

Surveillance(•  An(ongoing,(systema6c(collec6on,(analysis(and(interpreta6on(of(

healthYrelated(data(essen6al(to(the(planning,(implementa6on,(and(evalua6on(of(public(health(prac6ce(

•  Detec+on(and(no+fica+on(of(health(events(•  Collec+on(and(consolida+on(of(data(•  Inves+ga+on(of(cases(and(outbreaks(•  Rou+ne(Repor+ng((•  Feedback(

U.S.(CDC:(Ears,(EWIDS,(NTSIP,(ESP,(NEDSS,(FluNet,(BRFSS,(FoodNet,(etc.(Australia:((NNDSS(U.S.:(ProMED,(HealthMap(Canada:(FluWatch,(GPHIN(France:(GPs(Sen+nelles(Network(Asia:(APEC(EINet(WHO:(GOARN(Europe:(MedlSys(

52(

Page 51: Principles of Scientific Writing for an International Audience

CaseFControl(Studies(

•  Comparison(of(cases(versus(nonFcases((controls)(

•  Retrospec+ve(for(exposure(•  Matching(all(popula+on(characteris+cs(of(cases(to(those(of(controls((including(biases)(

•  Mostly(for(prevalent(cases((but(could(be(for(incident(cases,(too)(

53(

Page 52: Principles of Scientific Writing for an International Audience

Cohort(Studies(

•  To(support(the(rela+on(between(the(cause(and(disease(

•  Presence(or(absence(of(risk(factor(is(determined(before(outcome(occurs(

•  Longitudinal/prospec+ve/incidence(studies(•  Cohorts(are(free(of(disease(at(baseline(•  Cohorts(should(be(comparable(

•  Diagnos+cs(and(eligibility(should(be(defined(

54(

Page 53: Principles of Scientific Writing for an International Audience

Cohort(vs.(CaseFControl(

Popula+on(

Sample(of(diseaseFfree(individuals(

Exposed(

Not(Exposed(

Develop(Illness(

Don’t(Develop(Illness(

Exposed(

Not(Exposed(

Exposed(

Not(Exposed(

Sick(

Not(Sick(

Sick(

Not(Sick(

COHORT(STUDY(DATA(COLLECTION(

CaseFControl(Data(Collec+on( 55(

Page 54: Principles of Scientific Writing for an International Audience

Experimental:(Control(Study(

(Controlled:(–  Inves+gator(decides(on(interven+on(

(Randomized:(– Gold(Standard(in(Epidemiological(research(

– Controls(for(confounding(– Prevents(selec+on(Bias(

Therapeu+c(vs.(Preven+ve:((

(((((Pa+ents(with(Disease(vs.(Popula+on(at(Risk(

(

(56(

Page 55: Principles of Scientific Writing for an International Audience

Experimental:(Controlled(Studies(

Sample(of(diseaseFfree(individuals(

Exposed(

Not(Exposed(

Sick(

Not(Sick(

Sick(

Not(Sick(

(DATA(COLLECTION(

Exposure(occurs(naturally(

Inves+gator(Determines(Exposure(

COHORT((Observa+onal)(

CONTROLLED((Interven+onal)(

57(

Page 56: Principles of Scientific Writing for an International Audience

Randomized(Clinical(Trial(

Experimental(Popula+on(

(

Reference(Popula+on((

• (Sample(size(should(be(sufficient(• (Possibility(to(follow(up(during(the(trial(• (Par+cipants(should(be(informed(of(risks/(benefits/(blinding/(placebo(• (Inclusion(Criteria(

Experimental(Popula+on(

(

Reference(Popula+on((

Study(Popula+on(

Internal(Validity( External(Validity(58(

Page 57: Principles of Scientific Writing for an International Audience

Randomized(Clinical(Trial(

•  Design(–  Simple(–  CrossFover,(factorial((

•  Sampling(•  Eligibility(criteria(•  Blinding:(single(vs.(double(•  Alloca+on:(Randomiza+on(•  FollowFup(•  Analysis(•  Therapeu+c(vs.(NonFtherapeu+c(

59(

Page 58: Principles of Scientific Writing for an International Audience

Randomized(Trial:(CONSORT(Flow(

Eligible((NonFeligible(Declined(

Alloca+on(using(randomiza+on(scheme(

FollowFup(

Included(in(analysis(

60(

Page 59: Principles of Scientific Writing for an International Audience

Protocol of clinical study (typical errors)

•  During(development(of(CS(protocol:(–  Fail(to(jus+fy(the(study(of(given(drug(by(the(given(indica+ons;(–  Absence(of(preFclinical(and(clinical((if(applicable)(trials;(–  The(objec+ves(of(study(are(not(listed((primary(and(secondary(

objec+ves),(hypothesis(of(study;(–  Mixed(concep+on(of(primary(objec+ve(of(study(and(criteria(of(

efficacy;(–  Sta+s+cs!(Instead(of(sample(size(jus+fica+on(and(sta+s+cal(power:(

“the(assessment(will(be(performed(with(PC,(Excel,(Student’s(methods,(etc.”;(

–  Vague(procedures(and(methods,(allowing(ambiguous(interpreta+on;(–  No(dates,(no(versions(

Page 60: Principles of Scientific Writing for an International Audience

Protocol of clinical study (typical errors)

•  While(repor+ng(of(CS:((

–  Vague(descrip+on(of(study(popula+on,(that(unable(the(formula+on(of(conclusion(about(homoscendacity;(

(–  No(sta+s+cal(assessment(inclusion/exclusion(criteria(of(lost(followFup(

pa+ents;((–  No(side(therapy(details(and(its(effect(in(sta+s+cal(analysis;((–  No(severity(and(resolving(of(side(effects((e.g.(2(pa+ents(presented(the(

head(ache(–(no(terms,(methods(od(treatment,(outcome,(etc.);((–  No(pa+ents’(compliance(data;((–  Separate(reports(from(each(center(instead(of(allFcenters(consolidated(

report(…(

Page 61: Principles of Scientific Writing for an International Audience

General(Guidelines(For(Selec+on(of(Study(Type(

Study*objec2ve( Study*type(

Study(of(rare(diseases( Case(control(studies(

Study(of(rare(exposure,(such(as(exposure(to(industrial(chemicals(

Cohort(studies(in(a(popula+on(group(in(which(there(has(been(exposure((e.g.(industrial(workers)(

Study(of(mul+ple(exposures,(such(as(the(combined(effect(of(oral(contracep+ves(and(smoking(on(myocardial(infarc+on(

Case(control(studies(

Study(of(mul+ple(end(points,(such(as(mortality(from(different(causes(

Cohort(studies(

Es+mate(of(the(incidence(rate(in(exposed(popula+ons(

Exclusively(cohort(studies(

Study(of(covariables(which(change(over(+me(

Preferably(cohort(studies(

Study(of(the(effect(of(interven+ons( Interven+on(studies(63(

Page 62: Principles of Scientific Writing for an International Audience

Ecological*study*

CrossZsec2onal*study*

CaseZcontrol*study*

Cohort*study(and*RCT)*

Selec+on(bias(

N/A( 2( 3( 1(

Recall(bias( N/A( 3( 3( 1(

Loss(to(followFup(

N/A( N/A( 1( 3(

Confounding( 3( 2( 2( 1(

Time(Required(

1( 2( 2( 3(

Costs( 1( 2( 2( 3(

1Fslight;(2Fmoderate;(3Fhigh;(N/A=(not(applicable(

Costs(of(different(types(of(bias(for(different(study(designs(

64(

Page 63: Principles of Scientific Writing for an International Audience

Introduc+on(sec+on(

•  Iden+fy(a(gap(in(knowledge(or(knowFhow((study(problem)(o  Provide(key(background((scope/nature/magnitude(of(the(gap)(o  Be(clear(that(filling(this(gap(will(be(useful.(o  Describe(the(relevant(limita+ons(of(previous(studies(

•  Present(your(approach(to(filling(the(gap((study(purpose)(o  Be(clear(that(your(approach(is(new(o  Emphasize(that(your(approach(addresses(the(limita+ons(of(previous(studies(in(a(logical(and(compelling(way(

Purpose:(to(convince(the(reader(that(your(study(will(yield(knowledge(or(knowFhow(that(is(new(and(useful(

Oaen(requires(just(three(paragraphs(65(

Page 64: Principles of Scientific Writing for an International Audience

Introduc+on(Checklist(Background Statement:

Scope nature magnitude of the gap Be clear that filling the gap is useful

Problem Statement Describe relevant limitations

Study Statement Be clear that your approach is new Emphasize that your approach addresses limitations

Summary Statement Summarizes the study

66(

Page 65: Principles of Scientific Writing for an International Audience

Introduc+on(sec+on((

•  No(major(difference(in(introduc+on(sec+on(between(study(types(

•  Some+mes(summary(statement(is(omised,(or(becomes(part(of(the(study(statement(

•  STROBE:(Introduc+on

Background/ra+onale 2 Explain(the(scien+fic(background(and(ra+onale(for(the(inves+ga+on(being(reported

Objec+ves 3 State(specific(objec+ves,(including(any(preFspecified(hypotheses

67(

Page 66: Principles of Scientific Writing for an International Audience

Introduc+on(sec+on(

The(next(four(slides(detail(the(introduc+on(checklist(process(for(four(separate(studies:(

(

•  Background(statement(

•  Problem(statement(

•  Study(statement(– General(descrip+on(of(the(surveillance(system(

•  Summary(statement(

68(

Page 67: Principles of Scientific Writing for an International Audience

Background*Statement:*

*

The(treatment(of(human(immunodeficiency(virus((HIV)(infec+on(has(undergone(considerable(change.(Protease(inhibitors(and(non–nucleosideFanalogue(reverseFtranscriptase(inhibitors,(when(used(as(part(of(combina+on(drug(regimens,(can(profoundly(suppress(viral(replica+on,(with(consequent(reple+on(of(CD4+(cell(counts.(

Mul+ple(clinical(trials(have(shown(the(virologic(and(immunologic(efficacy(of(the(newer,(highly(ac+ve(an+retroviralFdrug(combina+ons(by(measuring(the(plasma(load(of(HIV(RNA(and(CD4+(cell(counts.(In(addi+on,(prophylac+c(medica+ons(are(now(being(used(rou+nely(to(prevent(disseminated(Mycobacterium(avium(complex(infec+on

Problem*Statement*

***

Several(reports(have(described(reduc+ons(in(mortality(and(in(the(rate(of(hospitaliza+on(of(HIV(infected(pa+ents;(however,(such(reduc+ons(have(not(been(clearly(related(to(specific(therapeu+c(regimens.(

Study*Statement* We(analyzed(data(collected(over(42(months(in(the(HIV(Outpa+ent(Study.(During(this(period,(rates(of(chemoprophylaxis(against(opportunis+c(infec+on(remained(rela+vely(constant(even(while(paserns(of(an+retroviral(therapy(were(changing

Summary*Statement*

This(report(outlines(the(changes(in(death(rates(and(the(incidence(of(opportunis+c(infec+ons(in(a(large(group(of(HIVFinfected(outpa+ents,(many(of(whom(had(previously(received(extensive(treatment.

69(

Page 68: Principles of Scientific Writing for an International Audience

Background*Statement:*

*

Among(the(few(diseases(claimed(to(occur(more(ogen(in(nonFsmokers(than(smokers(1(2(that(of(greatest(poten+al(importance(is(Alzheimer's(disease,(which(accounts(for(most(of(the(demen+as(of(later(life(in(Britain

Problem*Statement*

***

The(published(epidemiological(evidence,(although(sugges+ve(of(an(inverse(rela+on(with(smoking,(is(not(conclusive(either(about(Alzheimer's(disease(or(demen+a(in(general.(Much(of(the(evidence(derives(from(small(retrospec+ve(studies(of(uncertain(reliability,(many(of(which(excluded(vascular(demen+a.(Prospec+ve(studies,(in(which(smoking(habits(are(recorded(before(the(onset(of(demen+a,(should(be(more(informa+ve(about(the(overall(effects(of(smoking,(par+cularly(if(they(concern(large(numbers(and(prolonged(follow(up.(Only(a(few(such(studies(have,(however,(been(properly(reported((none(of(which(had(prolonged(follow(up)

Study*Statement*

We(sought(evidence(from(the(cohort(of(Bri+sh(doctors(who(have(been(followed(since(1951,(with(their(smoking(habits(reviewed(every(six(to(12(years.3(4(Many(have(died(from(or(with(some(type(of(demen+a(over(the(past(two(decades.

Summary*Statement*

70(

Page 69: Principles of Scientific Writing for an International Audience

Background*Statement:*

*

Alcohol(was(first(implicated(as(a(possible(risk(factor(for(stroke(in(1725(1)(Several(epidemiological(studies(now(suggest(a(UFshaped(associa+on(between(alcohol(intake(and(stroke(2).

Problem*Statement*

***

Previous((studies(have(been(cri+cized(for(not(differen+a+ng(between(nondrinkers(who(were(lifelong(abstainers(and(those(who(had(given(up(drinking(3F7)(By(asking(specifically(about(previous(regular(drinking(habits(we(have(been(able(to((dis+nguish(between(the(two(groups.(The(level(of(alcohol(consump+on(at(which(this(possible(protec+ve(effect(is(lost(and(alcohol(becomes(a(risk(factor(for(stroke(are(unknown.

Study*Statement*

We(report(the(findings(of(a(caseFcontrol(study(that(examines(the(contribu+on(of(alcohol(to(the(risk(of(stroke(in(moderate(and(heavy(drinkers((both(currently(and(previously),(lifelong(abstainers((those(who(have(never(drunk(alcohol),(and(current(abstainers((those(who(had(formerly(been(regular(drinkers(but(who(currently(do(not(drink(alcohol),(using(validated(measures(of(alcohol(consump+on.

Summary*Statement*

71(

Page 70: Principles of Scientific Writing for an International Audience

Background*Statement:*

*

Between(May(2009(and(May(2010,(Greece(experienced(two(waves(of(influenza(A(H1N1)2009(transmission

Problem*Statement*

***

Given(the(poten+al(for(worsening(in(the(clinical(severity(of(influenza(during(the(postFpandemic(influenza(season,(as(was(the(case(for(previous(influenza(pandemics([7F9],(it(was(cri+cal(to(con+nue(surveillance(with(a(focus(on(severe(cases(and(their(clinical(characteris+c

Descrip2on*of*the*Surveillance*System*

In(Greece,(influenza(is(annually(monitored(through(the(rou+ne(sen+nel(surveillance(system,(which(became(opera+onal(in(1999.(The(sen+nel(surveillance(system,(which(covers(approximately(three(percent(of(the(total(Greek(popula+on(in(the(2010/11(influenza(season,(provides(data(representa+ve(of(the(na+onal(popula+on

Summary*Statement*

This(report(summarises(data(from(influenza(surveillance(in(Greece(during(the(postFpandemic(2010/11(influenza(season.(

72(

Page 71: Principles of Scientific Writing for an International Audience

Materials(and(Methods(

•  Clearly(present/define(all(analysis(variables(•  Organize(into(logical(subsec+ons(that(illustrate(the(steps(you(took(to(collect,(organize,(and(analyze(the(data:(o  Study(popula+on(o  Defini+on(of(variables(o  Laboratory(methods/(epidemiological(inves+ga+on(o  Interven+on(

•  Describe(what(you(did,(not(what(you(found((Results)(•  Respect(chronology(•  Describe(the(original(methods(in(detail;(otherwise(give(references(

Purpose:(to(describe(how(you(collected,(organized(and(analyzed(data((relevant(to(the(study(purpose)(

Length(varies(depending(on(originality(of(methods( 73(

Page 72: Principles of Scientific Writing for an International Audience

Materials(and(Methods(–(part1(Methods Study(design Present(key(elements(of(study(design(early(in(the(paper

Seing Describe(the(seing,(loca+ons,(and(relevant(dates,(including(periods(of(

recruitment,(exposure,(followFup,(and(data(collec+on

Par+cipants(and(

Seing

(a)(Cohort(study—Give(the(eligibility(criteria,(and(the(sources(and(

methods(of(selec+on(of(par+cipants.(Describe(methods(of(followFup(

CaseYcontrol(study—Give(the(eligibility(criteria,(and(the(sources(and(

methods(of(case(ascertainment(and(control(selec+on.(Give(the(ra+onale(

for(the(choice(of(cases(and(controls(

CrossYsec6onal(study—Give(the(eligibility(criteria,(and(the(sources(and(

methods(of(selec+on(of(par+cipants

(b)(Cohort(study—For(matched(studies,(give(matching(criteria(and(

number(of(exposed(and(unexposed(

CaseYcontrol(study—For(matched(studies,(give(matching(criteria(and(the(

number(of(controls(per(case 74(

Page 73: Principles of Scientific Writing for an International Audience

Variables Clearly(define(all(outcomes,(exposures,(predictors,(poten+al(confounders,(and(effect(modifiers.(Give(diagnos+c(criteria,(if(applicable

Data(sources/(

measurement

(For(each(variable(of(interest,(give(sources(of(data(and(details(of(methods(of(assessment((measurement).(Describe(comparability(of(assessment(methods(if(there(is(more(than(one(group

Bias Describe(any(efforts(to(address(poten+al(sources(of(bias

Study(size Explain(how(the(study(size(was(arrived(at

Sta+s+cal(

methods

(a)(Describe(all(sta+s+cal(methods,(including(those(used(to(control(for(confounding (b)(Describe(any(methods(used(to(examine(subgroups(and(interac+ons (c)(Explain(how(missing(data(were(addressed (d)(Cohort(study—If(applicable,(explain(how(loss(to(followFup(was(addressed(CaseYcontrol(study—If(applicable,(explain(how(matching(of(cases(and(controls(was(addressed(CrossYsec6onal(study—If(applicable,(describe(analy+cal(methods(taking(account(of(sampling(strategy (e)(Describe(any(sensi+vity(analyses

75(

Materials(and(Methods(–(part2(

Page 74: Principles of Scientific Writing for an International Audience

Study(Design(

•  Observa+onal(or(Experimental(

•  Retrospec+ve(or(Prospec+ve(

76(

Page 75: Principles of Scientific Writing for an International Audience

Seing(and(Par+cipants(

•  Describe(the(study(popula+on(and(seing:(

•  Descrip+on(should(involve(relevant(demographic,(environmental,(diagnos+c,(comorbid(factors(

•  Defini+on(of(cohort/case(•  Exclusion/inclusion(criteria(•  How(was(consent(obtained?(•  Matching((in(caseFcontrol(study)(

77(

Page 76: Principles of Scientific Writing for an International Audience

Examples(of(seing(and(par+cipants(FF(cohort(

The(cohort(originally(comprised(34,439(male(doctors(on(the( Bri+sh( medical( register,( resident( in( the( United(Kingdom,(who(had( responded( to(a(ques+onnaire(about(their( smoking( habits( in( 1951.( Changes( in( such( habits(were(sought(in(1957,(1966,(1972,(1978,(1990,(and(1998,(and( other( personal( informa+on( was( sought( in( 1978,(1990,(and(1998.(In(1971,(follow(up(was(discon+nued(for(2459( subjects( (10.1%( of( the( survivors)( who(were( living(abroad( and( 218( (0.9%)( for( other( reasons.( Almost( all( of(the( remaining( survivors( have( con+nued( to( provide(informa+on(about(their(smoking(habits*.(

Smoking(and(demen6a(in(male(Bri6sh(doctors:(prospec6ve(study((

78(

Page 77: Principles of Scientific Writing for an International Audience

Examples(of(seing(and(par+cipants(–((case(control(

Cases*Three(hundred(sixtyFfour(consecu+ve(pa+ents(hospitalized(for(acute( stroke( in(Newcastle(upon(Tyne(between(August(1989( and( July( 1990( formed( the( study( popula+on.( No(pa+ent( refused( to( take( part( in( the( study.( Pa+ents( were(iden+fied(by(daily(contact(with(the(resident(medical(officer(and(completeness(of(case(ascertainment(was(checked(with(data( from(the(medical( records(department(at(each(of( the(three( par+cipa+ng( hospitals( (Freeman( Hospital,( Royal(Victoria( Infirmary,( and( Newcastle( General( Hospital)(Pa6ents( with( primary( subarachnoid( hemorrhage( were(excluded.(

(

Alcohol(and(stroke.(A(caseYcontrol(study(of(drinking(habits(past(

and(present((

79(

Page 78: Principles of Scientific Writing for an International Audience

Examples(of(seing(and(par+cipants(–((case(control((con+nued)(

(

Controls*Three(hundred(sixtyFfour(community(control(subjects(were(matched(for(age,(sex,(and(family(doctor.(Control(subjects(were(the(next(unrelated(matching(individual(to(the(case(in(

the(family(doctor(register.(Control(subjects(

with(a(previous(history(of(stroke(were(

excluded.(

80(

Page 79: Principles of Scientific Writing for an International Audience

Examples(of(seing(and(par+cipants(–((cross(sec+onal(

The(1997(obligatory(health(examina+on(before(school(entry( evaluated( 134,577( children( in( Bavaria,( southern(Germany.( At( the( examina+on,( the( parents( of( 13,345(children( seen( in( two( rural( regions( were( asked( to(complete(a(ques+onnaire(about( risk( factors( for(atopic(diseases.( Data( collected( by( this( ques+onnaire( were(linked( with( the( data( from( the( school( health(examina+on.( Our( analysis( was( confined( to( children(aged(5(and(6(who(had(German(na+onality.(

Breast(feeding(and(obesity:(cross(sec6onal(study(

81(

Page 80: Principles of Scientific Writing for an International Audience

Examples(of(seing(and(par+cipants(–((cross(sec+onal(

The(study(took(place(at(the(an+retroviral(therapy(clinic(of(Queen(Elizabeth(Central(Hospital(in(Blantyre,(Malawi,(from(January(2006(to(April( 2007.( Blantyre( is( the(major( commercial( city( of(Malawi,(with(a(popula+on(of(1,000,000(and(an(es+mated(HIV(prevalence(of(27%(in(adults(in(2004.Eligible(par+cipants(were(all(adults(aged(18( or( over( with( HIV( who( met( the( eligibility( criteria( for(an+retroviral( therapy( according( to( the( Malawian( na+onal( HIV(treatment( guidelines( (WHO( clinical( stage( III( or( IV( or( any(WHO(stage( with( a( CD4( count( <250/mm3)( and( who( were( star+ng(treatment( with( a( BMI( <18.5.( Exclusion( criteria( were( pregnancy(and( lacta6on(or(par6cipa6on( in(another( supplementary( feeding(program(

Supplementary(feeding(with(either(readyYtoYuse(for6fied(spread(or(cornYsoy(blend(in(

wasted(adults(star6ng(an6retroviral(therapy(in(Malawi:(randomised,(inves6gator(

blinded,(controlled(trial(

(

82(

Page 81: Principles of Scientific Writing for an International Audience

Seing(and(par+cipantsFSurveillance(

(ONGOING(OUTBREAK(OF(WEST(NILE(VIRUS(INFECTION(IN(HUMANS,(GREECE,(JULY(TO(AUGUST(2011(

CaseZDefini2on*•  (A(confirmed(case(is(defined(as(a(person(mee+ng(any(of(the(

following(clinical(criteria:(encephali+s,(meningi+s,(fever(without(specific(diagnosis(and(at(least(one(of(the(four(laboratory(criteria:((i)(isola+on(of(WNV(from(blood(or(cerebrospinal(fluid((CSF),((ii)(detec+on(of(WNV(nucleic(acid(in(blood(or(CSF,((iii)(WNVFspecific(an+body(response((IgM)(in(CSF,(and((iv)(WNV(IgM(high(+tre,(and(detec+on(of(WNV(IgG,(and(confirma+on(by(neutralisa+on.(

83(

Page 82: Principles of Scientific Writing for an International Audience

Study(Variables(

•  Specify(unit(of(measurement((if(applicable)(

•  Quan+fy(exposure(•  Variable(transforma+ons(

•  Criteria(for(defini+ons(•  Units(of(+me(and(special(categories(

84(

Page 83: Principles of Scientific Writing for an International Audience

Study(Variables((examples)(

The( children's( height( and( weight( were( measured( as(part(of(the(rou+ne(examina+on.(Body(mass(index(was(calculated( as( weight( (kg)/(height( (m)2).( The( age(specific(and(sex(specific(distribu+on(of(the(body(mass(index( among( all( children( with( German( na+onality( in(Bavaria,(which(had(been(inves+gated(during(the(1997(school(health(examina+on,(was(used(as(the(reference(for( being( overweight( (defined( as( body( mass( index(

above(the(90th(cen6le)(or(obese((defined(as(body(mass(

index( above( the( 97th( cen6le)( because( these( cen+les(were(higher(than(other(European(reference(values.((

85(

Page 84: Principles of Scientific Writing for an International Audience

Study(Variables((examples)((

Hypertension( was( iden6fied( by( medical( history( or(

posi6ve(screening(results((systolic(pressure(≥140(mm(

Hg).(PreYhypertension((asystolic(pressure(of(120–139(mm( Hg)( and( preYdiabetes( (a( fas6ng( blood( glucose(concentra6on( of( 6.1–6.9(mmol/L)( were( defined( on(the( basis( of( screened( laboratory( results.( Individuals(were( regarded( as( regular( alcohol( drinkers( if( they(consumed( two( or( more( alcoholic( drinks( a( day( on(three(or(more(days(a(week,(and(occasional(drinkers(if(they(consumed(less(than(regular(drinkers.(

86(

Page 85: Principles of Scientific Writing for an International Audience

Study(Variables((con+nued)(

Data( from( clinic( visits( were( used( to( calculate( the( number( of( days( of(observa6on(per(quarter( for(each(pa+ent( in(each(of( four(categories(of(prescribed(an+retroviral(therapy.(These(categories,(in(increasing(order(of(intensity,(were(no(an+retroviral(therapy,(monotherapy,(combina+on(therapy( without( a( protease( inhibitor,( and( combina+on( therapy( that(included(a(protease(inhibitor.(((The( data( collected( for( each( case,( using( a( standardised( form,( were:(demographic( characteris+cs( (age,( sex),( dates( of( admission( to( the(hospital( and( the( ICU,( the(+me( course( of( illness( including( the( date( of(symptom( onset,( underlying( condi+ons,( complica+ons,( use( of(mechanical( ven+la+on( support( (dates( of( intuba+on( and( extuba+on),(and(an+viral(treatment(

87(

Page 86: Principles of Scientific Writing for an International Audience

Data(Sources/Management(

•  How(the(data(were(collected(•  If(it(was(part(of(the(registry,(describe:(

– Original(purpose(of(the(database(– How(large(the(database(is,(+meliness(– Valida+on,(quality(checks(– Error(rate(

•  Database(sogware/hardware(•  For(surveillance(paper(–(a(diagram(of(the(surveillance(system(is(preferred((

88(

Page 87: Principles of Scientific Writing for an International Audience

Data(Sources/Management(

Pa+ents( (with( a( close( rela+ve( or( significant( other(

when( possible)( were( interviewed( and( examined( by(

H.R.( (79%)( or( P.D.A.( within( 48( hours( of(

hospitaliza+on.( Control( subjects(were( interviewed( in(

their(homes(by(H.R.((also(with(a(rela+ve(or(significant(

other( when( possible).( InterFobserver( valida+on(

studies( between( the( two( interviewers( were( carried(

out.( The( propor+on( of( agreement( between( two(

observers,(K,(was(0.68.((

89(

Page 88: Principles of Scientific Writing for an International Audience

Data(Sources/Management(

Drinking( frequency( was( recorded( as( a( categorical(variable,( whereas( past( and( present( amounts( of(alcohol( consump+on,( dura+on( of( abs+nence,( and(heavy( drinking( were( recorded( as( con+nuous(variables.( Data( were( transferred( to( Northumbrian(

University's( Mul6ple( Access( Computer( (NUMAC).(

Following( verifica6on( procedures( to( ensure( accurate(

transcrip6on,(data(were(analyzed(using(spssYx((SPSSYX(

Batch(System,(SPSS(Inc.,(Chicago,(Illinois).(

90(

Page 89: Principles of Scientific Writing for an International Audience

•  Informa6on(in(five(general(categories(has(been(abstracted(

from(the(chart(for(each(outpa6ent(visit(and(entered(

electronically(by(trained(data(abstracters;(the(data(are(

compiled(centrally,(reviewed,(and(corrected(before(being(

included(in(the(data(base.(Because(the(study(physicians(are(

the(source(of(primary(care(for(these(pa+ents,(all(symptoms,(

diagnoses,(and(treatments(since(the(previous(visit,(are(noted(

at(each(clinic(visit.(The(categories(of(informa+on(are(as(

follows:(demographic(characteris+cs;(symptoms;(diagnosed(

diseases;(medica+ons(prescribed;(and(laboratory(values.((

Data(Sources/Management(

91(

Page 90: Principles of Scientific Writing for an International Audience

Data(Sources/Management(

92(

Page 91: Principles of Scientific Writing for an International Audience

Study(Size(

•  Specify(the(null(hypothesis(and(whether(it(is(one(or(twoFsided(

•  Specify(the(minimum(difference(in(response(variable(that(is(considered(to(be(clinically(important(

•  Specify(power(and(alpha(level(for(calcula+ng(sample(size(

93(

Page 92: Principles of Scientific Writing for an International Audience

Examples(

To( detect( a( reduc+on( in( PHS( (postopera+ve(hospital( stay)(of(3$days$ (SD(5(days),(which( is( in(agreement(with( the( study(of( Lobo(et(al.(with(a(twoFsided(5%( significance( level( and(a(power(of(80%,(a(sample(size(of(50(pa+ents(per(group(was(necessary,(given(an(an+cipated(dropout( rate(of(10%.( To( recruit( this( number( of( pa+ents,( a( 12Fmonth(inclusion(period(was(an+cipated(

94(

Page 93: Principles of Scientific Writing for an International Audience

Examples(

Based(on(an(expected( incidence(of( the(primary(composite(endpoint(of(11%(at(2.25(years(in(the(placebo( group,( we( calculated( that( we( would(need(950(primary(endpoint(events(and(a(sample(size( of( 9650( pa+ents( to( give( 90%( power( to(detect( a( significant( difference( between(ivabradine(and(placebo,(corresponding(to(a(19%$reduc;on$of$rela;ve$risk$(with(a(twoFsided(type(1(error(of(5%)(

95(

Page 94: Principles of Scientific Writing for an International Audience

Randomiza+on(–((Randomized(controlled(trials((RCT)(

Par+cipants( should( be( assigned( to(comparison( groups( in( the( trial( on( the(basis( of( a( chance( (random)( process(characterized(by(unpredictability(******(

96(

Page 95: Principles of Scientific Writing for an International Audience

(Randomized(controlled(trials((RCT)(FF(

examples(

•  Independent(pharmacists(dispensed(either(ac+ve(or(placebo(inhalers(according(to(a(computer(generated(randomiza+on(list(

(•  For(alloca+on(of(the(par+cipants,(a(computerFgenerated(list(of(random(numbers(was(used(

******(

97(

Page 96: Principles of Scientific Writing for an International Audience

Randomiza+on((con+nued)(

•  Randomiza+on(sequence(was(created(using(Stata(9.0((StataCorp,(College(Sta+on,(TX)(sta+s+cal(sogware(and(was(stra+fied(by(center(with(a(1:1(alloca+on(using(random(block(sizes(of(2,(4,(and(6(

(•  Par+cipants(were(randomly(assigned(following(simple(randomiza+on(procedures((computerized(random(numbers)(to(1(of(2(treatment(groups(

98(

Page 97: Principles of Scientific Writing for an International Audience

Randomiza+on(FF(Concealment(

A( generated( alloca+on( schedule( should( be(implemented(by(using(alloca+on(concealment,(a( c r i+ca l( mechan i sm( that( p revents(foreknowledge( of( treatment( assignment( and(thus(shields(those(who(enroll(par+cipants(from(being( influenced( by( this( knowledge.( The(decision( to( accept( or( reject( a( par+cipant(should(be(made,(and(informed(consent(should(be(obtained(from(the(par+cipant,(in(ignorance(of(the(next(assignment(in(the(sequence(

99(

Page 98: Principles of Scientific Writing for an International Audience

Randomiza+on((concealment)(

The(doxycycline(and(placebo(were(in(capsule(form(and(iden+cal(in(appearance.(They(were(prepackaged( in( bosles( and( consecu+vely(numbered(for(each(woman(according(to(the(randomiza+on( schedule.( Each( woman( was(assigned( an( order( number( and( received( the(capsules( in( the( corresponding( preFpacked(bosle(

100(

Page 99: Principles of Scientific Writing for an International Audience

Blinding((RCTs)(

The( term( “blinding”( or( “masking”( refers( to(withholding( informa+on( about( the( assigned(interven+ons(from(people(involved(in(the(trial(who(may( poten+ally( be( influenced( by( this( knowledge.(Blinding( is( an( important( safeguard( against( bias,(par+cularly(when(assessing(subjec+ve(outcomes.(EXAMPLE:(Whereas( pa+ents( and(physicians( allocated( to( the(interven+on( group( were( aware( of( the( allocated(arm,( outcome( assessors( and( data( analysts( were(kept(blinded(to(the(alloca+on.(

101(

Page 100: Principles of Scientific Writing for an International Audience

Laboratory(Methods(Surveillance)(

Serum(and(CSF(specimens(were(tested(for(the(presence(of(WNVFspecific(IgM(and(IgG(an+bodies(using(commercial(ELISA(kits((WNV(IgM(capture(DxSelect(and(WNV(IgG(DxSelect,(Focus(Diagnos+cs(Inc,(Cypress,(CA,(USA).(WNV(posi+ve(specimens(were(also(tested(for(the(presence(of(other(flaviviruses:(+ckFborne(encephali+s(virus((TBEV)(and(dengue(virus((DENV).(

102(

Page 101: Principles of Scientific Writing for an International Audience

Sta+s+cal(Methods(

•  Describe(all(sta+s+cal(methods,(including(those(used(to(control(for(confounding(

•  Describe(the(comparisons(to(be(made(and(the(sta+s+cal(procedures(to(be(used(for(making(them(

•  State(whether(the(sta+s+cal(analysis(will(be(on(the(basis(of(inten+onFtoFtreat(

•  Control(for(mul+ple(tes+ng(problem(•  Report(hypothesis(power(and(level((if(it(is(not(reported(in(sampling(sec+on)(

•  Report(all(required(pFvalues(and(confidence(intervals(

103(

Page 102: Principles of Scientific Writing for an International Audience

(A(

(В(

(С(

(D(

Sick *******************Not*sick*

***************Expo

sed********Not*exposed

*

****Cases * *Controls*

No*history*of*disease******History*of*d

isease*

Assessment(of(risk(ra+on(

(A(

(В(

(С(

(D(

In(case(control(study(the(risk(ra+on(has(no(outcome,(odds(ra+on(used(instead(

Page 103: Principles of Scientific Writing for an International Audience

Repor+ng(sta+s+cal(methods(in((CrossFSec+onal(studies(

•  Standard(descrip+ve(sta+s+cs:(FSimple(prevalence(calcula+on(

•  Prevalence(of(disease(or(prevalence(of(exposure(

•  Regression(to(control(confounders(

105(

Page 104: Principles of Scientific Writing for an International Audience

CrossFsec+onal(study(example:(Sta+s+cal(Methods(

Pa+ent( characteris+cs,( adjusted( for( stone( history(and(age,(were(compared(using( linear(regression(for(con+nuous( covariates( and( logis6c( regression( for(categorical( covariates.( Mul6ple( linear( regression(was(used(to(compare(mean(es+mated(GFR(between(stone( formers( and( nonFstone( formers.( Covariates(iden+fied( as( poten+al( confounders( in( the(rela+onship( between( es+mated( GFR( and( stone(history(were(adjusted(for.(Mul6plica6ve(interac6ons(between( stone( history( and( age,( gender,( race,(diabetes,(and(BMI(were(formally(tested.((

106(

Page 105: Principles of Scientific Writing for an International Audience

CrossFsec+onal(study(example:(Sta+s+cal(Methods(

Mul6nomial(logis6c(regression(was(used(to(compare(the( rela+ve( risk( of( having( an( es+mated( GFR( in( a(lower( category( rela+ve( to( the( highest( category(between( persons( with( and( without( nephrolithiasis.(Model(based(es+mates(are(reported(as(rela6ve(risk(ra6os( comparing( stone( formers( with( nonFstone(formers.( Adjustment( covariates( included( in( the(mul+nomial(logis+c(regression(included(age,(gender,(race,( BMI,( systolic( blood( pressure,( HbA1c,( diabetes,(history( of( cardiovascular( disease,( smoking( status,(health( insurance( status,( and( use( of( prescrip+on(diure+cs.(

107(

Page 106: Principles of Scientific Writing for an International Audience

CrossFsec+onal(study(example(Sta+s+cal(Methods(

•  The(prevalence(of(overweight(and(obese(children(were(calculated(according(to(the(dura+on(of(breast(feeding.(The(appropriate(χ2$tests$were(used(to(compare(several(items(in(breasÜed(and(nonFbreasÜed(children(and(their(associa+on(with(the(child(being(overweight(or(obese.(Logis6c(regression(models(were(used(to(assess(the(impact(of(variables(that(were(significantly(associated((P<0.05)(with(both(breast(feeding(and(being(overweight(or(obese(Confounding(was(assumed(to(have(occurred(if(the(odds(ra6o(changed(by(≥10%.(Confounders(and(independent(risk(factors(were(included(in(the(final(logis6c(regression(model.(All(calcula+ons(were(carried(out(with(the(SAS(sogware(package,(version(6.12.(

108(

Page 107: Principles of Scientific Writing for an International Audience

Sta+s+cal(Methods((CaseFcontrol)(

•  Comparing(groups:(– Nominal((chiFsquared(or(McNemar’s(test)(– Ordinal((Wilcoxon,(signedFrank,(KruskalFWallis,(ANOVA)(

–  Con+nuous((tFtest,(ANOVA)(•  Odds(ra+os(–(strength(of(associa+on(between(exposure(and(disease(is(commonly(measure(by(an(OR(

•  Logis+c(Regression:(to(make(inference(on(exposureFdisease(associa+on(while(adjus+ng(for(covariates(

109(

Page 108: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(CaseFControl(Study(

The(MannYWhitney(U(test(was(used(for(between(group(analyses(of(nonparametric(data,(the(standard(χ2(test(when(appropriate(for(discrete(variables,(and(McNemar's(χ2(test(to(compare(discordant(pairs.(The(odds(ra6o((OR)(with(95%(confidence(intervals((CIs)(was(used(as(an(es+mate(of(risk.(LogFlinear(analysis(was(used(to(calculate(the(adjusted(odds(ra+o(for(poten+al(confounding(variables.(

110(

Page 109: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Cohort(Studies(and(Clinical(Trials(

•  TimeFtoFevent(data:(Survival(func+ons(–  Describe(censored(data((–  Confirm(that(requirements(have(been(met(

•  KaplanFMeier(analysis(•  Specify(methods(to(compare(two(or(more(survival(

curves(logFrank(or(Wilcoxon)(•  Hazard(ra+o(•  Cox(Propor+onal(Hazards(Model(

–  Report(measure(of(risk(for(each(variable(•  Repeated(measures(for(mul+ple(+me(points)(•  ANCOVA(for(primary(and(secondary(endFpoints(•  Number(of(end(points((

111(

Page 110: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Cohort(Studies(and(RCTs(

As(preFspecified,(efficacy(analyses(were(performed(with( the( use( of( a( modified( inten+onFtoFtreat(approach,(which(included(the(randomized(pa+ents(and( the( endFpoint( events( that( occurred( ager(randomiza+on(and(no(later(than(the(comple+on(of(the(treatment(phase(of(the(study((i.e.,(the(globalFtreatment( end( date),( 30( days( ager( early(permanent( discon+nua+on( of( the( study( drug,( or(30(days( ager( randomiza+on( for(pa+ents(who(did(not(receive(a(study(drug(

112(

Page 111: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Cohort(Studies(and(RCTs((con+nued)(

We(used(hazard(ra6os(and(twoFsided(95%(confidence(intervals(to( compare( the( study( groups.( Rates( of( the( end( points( were(expressed( as( Kaplan–Meier( es+mates( through( 24( months.(Tes+ng(was(preFspecified(to(occur(between(the(combinedFdose(group(for(rivaroxaban(and(placebo(at(an(alpha(level(of(0.05(on(the( basis( of( the( logYrank( test,( stra+fied( according( to( the(inten+on(to(use(a(thienopyridine.(If(this(comparison(significantly(favored(rivaroxaban,(then(each(of(the(two(doses(of(rivaroxaban(was( simultaneously( compared(with( placebo(with( the( use( of( a(similar( stra+fied( logFrank( test( at( an( alpha( level( of( 0.05(on( the(basis( of( the( closed( tes+ng( procedure.( Results( were( examined(according( to( major( subgroups( for( general( consistency( of(treatment(effect,(and(interac+on(tes+ng(was(performed.(

113(

Page 112: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Randomized(Controlled(Experiments(

The( primary( endpoint( was( change( in(bodyweight(during(the(20(weeks(of( the(study(in( the( inten+onFtoFtreat( popula+on( …(Secondary(efficacy(endpoints( included(change(in( waist( circumference,( systolic( and( diastolic(blood( pressure,( prevalence( of( metabolic(syndrome(…(

114(

Page 113: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Randomized(Controlled(Experiments(

We( used( an( analysis* of* covariance* (ANCOVA)( for(the(primary(endpoint(and(for(secondary(endpoints(waist( circumference,( blood( pressure,( and( pa+entFreported( outcome( scores;( this( was( supplemented(by( a( repeated( measures( analysis.( The( ANCOVA(model( included( treatment,( country,( and( sex( as(fixed( effects,( and( bodyweight( at( randomiza+on( as(covariate.( We( aimed( to( assess( whether( data(provided(evidence(of(superiority(of(each(liraglu+de(dose( to(placebo( (primary(objec+ve)(and( to(orlistat((secondary(objec+ve(

115(

Page 114: Principles of Scientific Writing for an International Audience

Repor+ng(Sta+s+cal(Methods(in(Cohort(Studies(and(RCTs(

We( calculated( hazard( ra6os( (HR)( to( compare( mortality(risks( between( individuals( in( different( exercise( groups((grouped(by(volume(of(exercise)(and(those(in(the(inac+ve(group.( We( used( a( Cox( propor6onate( model( to( analyze(categorical(and(con+nuous(variables(…((The( life( table( method( was( used( to( es+mate( life(expectancy.(We(calculated(adjusted(odds(ra+os(and(95%( CIs( by( comparing( the( propor+on( of( individuals(mee+ng(ac+vity(recommenda+ons(with(the(propor+on(of(those(who(were(inac+ve(within(each(characteris+c(group(

116(

Page 115: Principles of Scientific Writing for an International Audience

Sta+s+cal(Methods(F(Surveillance(

•  Exploratory(data(analysis:(–  Incidence(by(age,(sex,(geography(–  Trends(

•  Severity(factors(•  Group(comparisons((

–  Two(sample(tests,(etc.(•  Event(detec+on(

–  Detec+on(methods(+me(series/spa+otemporal)(–  Timeliness(–  Sensi+vity/Specificity((

117(

Page 116: Principles of Scientific Writing for an International Audience

•  For(early(detec+on(of(localized(clusters(of(dead((birds,(we(used(a(prospec+ve(surveillance(system((that(is(based(on(the(spa+al(scan(sta+s+c((9).(This((scan(sta+s+c(uses(a(circular(window(to(represent(poten+al(geographic(clusters.(

•  Temporal(trends(in(annual(no+fica+on(rates(of(salmonellosis,(infec+ous(diarrhoea(and(outbreaks(of(foodFborne(diseases(were(assessed(using(the(Cuzick(test([9].(Annual(rates(of(salmonellosis(and(infec+ous(diarrhoea(were(compared(between(the(sexes(using(the(Mann–Whitney(test(and(among(age(groups(using(the(Kruskal–Wallis(test.(Post(hoc(paired(comparisons(ager(the(Kruskal–Wallis(test(were(tested(using(the(Mann–Whitney(test(on(each(pair(of(age(group(and(pFvalue(adjustment(according(to(Bonferroni’s(method([10](

Sta+s+cal(Methods(F(Surveillance(

118(

Page 117: Principles of Scientific Writing for an International Audience

Results(

•  Start(with(the(tables(and(figures.((Write(the(text(later.(o  Use(tables(to(highlight(individual(values(o  Use(figures(to(highlight(trends(and(rela+onships(

•  Text(supplements(and(reinforces(tables(and(figures(o  Summarize/emphasize(highlights(o  Fill(in(gaps((ogen(minor)(

•  Present(results(in(a(logical(sequence(•  Describe(what(you(found,(not(what(you(did((Methods)(•  Consider(subFsec+ons(similar(to(the(ones(in(Methods(•  Look(to(published(ar+cles(for(poten+al(templates(

Purpose:(to(describe(the(results(of(data(analysis(that(are(relevant(to(the(study(purpose(

119(

Page 118: Principles of Scientific Writing for an International Audience

Results((con+nued)(Tables/Figures(•  Check(your(math;(provide(consistent(row(or(column(

summa+on.(•  Keep(lines(to(a(minimum;(avoid(ver+cal(lines.(•  Use(footnotes(to(clarify(points(of(poten+al(ambiguity.(•  Check(headings,(labels(of(rows/columns/axes,(and(footnotes(Text(•  Highlight(key(rela+onships(between(dependent/independent(

variables.(•  Present(a(logical(sequence:((

o  in(parallel(with(methods((consider(similar(subheadings)(o  background(data(→(descrip+ve(→(bivariate(→(mul+variate(

•  Make(sure(all(numbers(in(text(are(consistent(with(tables/figures.(

(($$$$( Oaen(requires(just(three(paragraphs(+(three(tables/figures(

120(

Page 119: Principles of Scientific Writing for an International Audience

Tables(versus(Figures(

Tables:(beser(to(use(when(knowledge(of(individual(values(or(sta+s+cs(are(more(important(than(trends(and(conceptual(understanding(

1.  Title(2.  Column/row(headings(

3.  Data(fields(4.  Footnotes(5.  Spanner(

121(

Page 120: Principles of Scientific Writing for an International Audience

Five(elements(of(a(table(

122(

Page 121: Principles of Scientific Writing for an International Audience

Table(Title:(Example(Example(1:(( (Sta+n(therapy(and(cancer(recurrence.(Example(2:((

(Effect(of(daily(oral(primvasta+n(or(dorvasta+n(on(the(4Fyear(odds(ra+o(for(the(recurrence(of(prostate(and(breast(cancer.(Example(3:(( (The(effect(of(daily(oral(primvasta+n(or(dorvasta+n(on(the(4Fyear(odds(ra+o((OR)(for(the(recurrence(of(prostate(and(breast(cancer(shows(a(3Ffold(lower((P(=(0.002)(OR(for(the(recurrence(of(breast(cancer(for(pa+ents(receiving(primvasta+n((OR(=(2.3)(versus(dorvasta+n((OR(=(6.8).(

123(

Page 122: Principles of Scientific Writing for an International Audience

Tables(:(General(Recommenda+ons(

•  Indicate(missing(data(by(using(a(dash,(NA,(or(…(

•  Each(footnote(should(be(placed(on(a(separate(line(at(the(bosom(of(the(table(

•  Lesers((or(numbers,(or(symbols)(designa+ng(footnotes(should(be(ordered(alphabe+cally((or(numerically)(

•  The(symbol(designa+ng(a(footnote(that(applies(to(the(en+re(table(should(be(placed(ager(the(+tle(

124(

Page 123: Principles of Scientific Writing for an International Audience

Table(Alignment(

•  The(stubs(should(be(all(leg(jus+fied(•  In(the(columns/data(fields,(words(should(be(leg(jus+fied(and(whole(numbers(rightFjus+fied((

•  Data(fields(containing(decimal(points,(plus/minus(symbols,(slashes,(hyphens,(or(parentheses(should(be(aligned(on(these(elements.(

•  When(the(text(in(a(stub(wraps(to(a(second(line,(the(corresponding(data(field(should(align(with(the(top(line(of(the(stub.(

125(

Page 124: Principles of Scientific Writing for an International Audience

A.*Annual*per*capita*healthcare*expenditures.*

Expenditure,($(

Israel* 1971(

Madagascar* 36(

Sweden* 2828(

Yemen* 82(

Zimbabwe* 149(

B.*Annual*per*capita*healthcare*expenditures.*

Expenditure,($(

Israel* 1971(

Madagascar* 36(

Sweden* 2828(

Yemen* 82(

Zimbabwe* 149(

C.*Annual*per*capita*healthcare*expenditures.*

Expenditure,($(

Sweden* 2828(

Israel* 1971(

Zimbabwe* 149(

Yemen* 82(

Madagascar* 36(

Table(alignment(example(

126(

Page 125: Principles of Scientific Writing for an International Audience

Tables,(column(formats(example(

Mean (SD), mg/L

Mean ± SD, mg/L

Deviation from target, %

Pig serum 11.4 (2.1) 11.4 ± 2.1 14 Sheep serum 10.7 (1.4) 10.7 ± 1.4 7 Artificial serum 10.3 (0.8) 10.3 ± 0.8 3

Saline 10.1 (0.6) 10.1 ± 0.6 1 Human serum 9.9 (0.6) 9.9 ± 0.6 −1 Cow serum 9.6 (1.4) 9.6 ± 1.4 −4 Horse serum 8.9 (0.7) 8.9 ± 0.7 −11

Table 3. Phenytoin concentrations measured by immunoassay for matrices supplemented with 10 mg/L phenytoin.#

Two*different*styles**of*presen2ng*results**127(

Page 126: Principles of Scientific Writing for an International Audience

What(is(the(right(size?(

•  60(characters(for(halfFpage,(120(for(full(•  For(a(2Fcolumn(journal,(110(characters(would(fit(onto(a(portraitFformased(page.(

•  Otherwise(journal(might(publish(landscape((•  ReForient(if(number(of(column(headings(:(row(headings(greater(2:1(

•  If(only(one(pFvalue(out(of(the(whole(column(is(significant(–(remove(and(place(a(not(in(a(footnote(

•  Use(abbrevia+ons(when(journals(permit(it(•  Split(into(2(

128(

Page 127: Principles of Scientific Writing for an International Audience

Example(:(Table(Too(Wide(

Age, years

Undifferentiated leukemia

, %

Myeloblastic

leukemia, %

Promyelocytic

leukemia, %

Myelomonocytic

leukemia, %

Monocytic

leukemia, %

Erythroleukemia,

%

Microkaryoblasti

c leukemia

, %

Megakaryoblastic leukemia

, %

<21 91 80 85 81 82 73 62 52

21–40 89 83 79 77 68 61 57 41

41–60 74 62 68 59 40 37 31 24

>60 51 48 39 34 28 21 16 9

Table 5. Age-related 5-year survival for forms of acute myelogenous leukemia.#

129(

Page 128: Principles of Scientific Writing for an International Audience

Table,(reForiented(

AML type Age

<21 Years 21–40 Years 41–60 Years >60 Years

Undifferentiated, % 91 89 74 51

Myeloblastic, % 80 83 62 48

Promyelocytic, % 85 79 68 39

Myelomonocytic, % 51 48 39 34

Monocytic, % 82 68 40 28

Erythroleukemia, % 73 61 37 21

Microkaryoblastic, % 62 57 31 16

Megakaryoblastic, % 52 41 24 9

Table*7.(AgeFrelated(5Fyear(survival(for(forms(of(acute(myelogenous(leukemia((AML)(

130(

Page 129: Principles of Scientific Writing for an International Audience

Formaing(tables,(con+nued(

Study No. of patients

Leukocyte count, %a Day 0

Day 7

Day 14

Day 21

Day 28

Day 56

Day 84

Wilkins and Potter, Refb11 M11;F11 100 97 — 84 — — 70

Pillsbury et al., Ref 12 M10;F18 100 100 81 — 76 — 64

Annesley et al., Ref 18 M27;F20 100 89 76 — 63 — 62

Kronnenberg and Stenmeyerson, Ref 20 M9;F7 100 103 95 — 88 69 —

Flowers and Peterson, Ref 25 M20;F23 100 101 96 93 89 86 98

Flloyd et al., Ref 26 M27;F23 100 95 — — 91 — 79

Robinson et al., Ref 27 M19;F20 100 — 100 — 96 — 94

Nowicki and Phillips, Ref 32 M15;F16 100 — 92 — 82 74 —

Table 6. Previous studies of leukocyte reduction during kelvac therapy in patients with chronic myelogenous leukemia.#

Are(these((columns(necessary?(

131(

Page 130: Principles of Scientific Writing for an International Audience

Figures(

•  Proper+es(of(a(good(graph:(– Draws(asen+on(to(the(data(and(not(the(graph(– The(symbols(and(connec+ng(lines(are(easy(to(read(

– Axis(number(and(labels(are(easy(to(read(

– The(lengths(of(the(two(axes(are(balance(((1:1.3)(– The(scales(used(on(each(axis(match(the(range(

– Tick(marks(are(used(appropriately(

– The(legend(is(clear(and(concise(– SelfFsufficient((

– The(data(deserve(to(be(graphed(132(

Page 131: Principles of Scientific Writing for an International Audience

Common(Mistakes(

Plasma*vs.*serum*sodium*for*paired*specimens*from*150*pa2ents.*(A),(xF(and(yFaxis(scales(of(0–165(mmol/L;(((B),(xF(and(yFaxis(scales(of(120–170(mmol/L;(((C),(Bland–Altman(plot.(

133(

Page 132: Principles of Scientific Writing for an International Audience

Using(appropriate(axis(interval(

134(

Page 133: Principles of Scientific Writing for an International Audience

Why(include(this(graph?(

135(

Page 134: Principles of Scientific Writing for an International Audience

Results(vs.(Data(Figure(1(shows(the(survival(rates(following(diagnosis(and(ini+a+on(of(treatment(in(the(3(treatment(groups.(At(6(months(the(survival(rates(were(95%(for(the(A(group,(91%(for(the(B(group,(and(39%(for(the(radia+onFtreated(group.(At(12(months(the(rates(were(83%,(69%,(and(23%;,(at(18(months(74%,(17%,(and(15%;(and(at(24(months(were(70%,(11%,(and(9%.(

Data*but*no*results*

Figure(1(shows(the(survival(rates(following(diagnosis(and(ini+a+on(of(treatment(in(the(3(treatment(groups.(At(6(months(the(survival(rates(were(significantly(higher(in(the(A(and(B(treatment(groups(compared(with(the(radia+onFtreatment(group.(At(12,(18,(and(24(months(the(survival(rates(in(the(A(group(exceeded(those(of(both(the(B(and(radia+onFtreatment(groups.(

Results,*but*no*data*

136(

Page 135: Principles of Scientific Writing for an International Audience

Results(vs.(Data(

Six(months(ager(diagnosis(and( ini+a+on(of(treatment,(the(survival(rates(for(the(A(and( B( groups( were( 2.4( and( 2.3( +mes(higher,( respec+vely,( than( the( radia+on(treatment( group( (both( P( <( 0.001),( but(survival( rates( were( not( found( to( differ(between( the( A( and( B( groups( (P( =( 0.56)((Figure( 1).( By( 12( months,( however,(pa+ent( survival( in( the( A( group( was( 1.2(+mes( higher( than( in( the( B( group( (P( =(0.031),( and( 4.3( and( 6.4( +mes( higher( at(18(and(24(months((both(P(<0.001).(

137(

Page 136: Principles of Scientific Writing for an International Audience

Results(and(only(the(Results(

We( compared( the( death( rates( for( the( 262( healthy( controls(

with(those(of(the(203(conges6ve(heart(failure(pa6ents(over(a(

2Yyear( period.( Survival( curves( were( generated( with( the(

Masterson( mortality( index( formula.( The( conges+ve( heart(failure(group(was(found(to(have(a(significantly(higher(shortFterm(mortality(rate.(

When( the( 2Fyear( survival( curves( for( healthy( controls( and(conges+ve( heart( failure( pa+ents( were( compared,( the(conges+ve( heart( failure( group( was( found( to( have( a(significantly(higher(shortFterm(mortality(rate.(

138(

Page 137: Principles of Scientific Writing for an International Audience

Using(modern(graphics(and(visualiza+on(

Page 138: Principles of Scientific Writing for an International Audience

Using(modern(graphics(and(visualiza+on(

PennFstate(university:(mul+Fpurpose(map(with(+me(and(spa+al(flu(cases(distribu+on(support(

Page 139: Principles of Scientific Writing for an International Audience

Using(modern(graphics(and(visualiza+on(

Red(–(anger,(blue(–(dissa+sfac+on,(yellow(–(joy,(emo+ons(in(blog(community(

Page 140: Principles of Scientific Writing for an International Audience

Использование(современных(графиков(и(методов(визуализации(

Popula+on(distribu+on(by(countries(

Page 141: Principles of Scientific Writing for an International Audience

Results(F(Key(Tables(•  Study(flow(•  Comparison(between(study(and(control(group(at(baseline((so(

groups(are(comparable)(–  Give(characteris+cs(of(study(par+cipants((e.g.(demographic,(clinical,(social)(and(informa+on(on(exposures(and(poten+al(confounders(

–  (Cohort(study—Summarise(followFup(+me((e.g.,(average(and(total(amount)(

•  Primary(comparison(table(–  (cohort,(RCT)(Report(absolute((and(rela+ve)(differences(for(primary(endpoints(

–  (cohort,(RCT)(Report(95%(CI(for(primary(endpoints(–  (caseFcontrol)Report(numbers(in(each(exposure(category,(or(summary(measures(of(exposure(

–  (crossFsec+onal)(Report(numbers(of(outcome(events(or(summary(measures(

143(

Page 142: Principles of Scientific Writing for an International Audience

Results(F(Key(Tables((con+nued)(•  Main(Results:(

– (Give(unadjusted(es+mates(and,(if(applicable,(confounderFadjusted(es+mates(and(their(precision((e.g.,(95%(confidence(interval).(Make(clear(which(confounders(were(adjusted(for(and(why(they(were(included(

– (Report(category(boundaries(when(con+nuous(variables(were(categorized(

– (If(relevant,(consider(transla+ng(es+mates(of(rela+ve(risk(into(absolute(risk(for(a(meaningful(+me(period(

144(

Page 143: Principles of Scientific Writing for an International Audience

Results(Checklist(Par+cipants( Report(number(of(individuals(at(each(

stage(of(the(study(• Consider(flow(diagram(• Give(reasons(for(nonFpar+cipa+on(

Baseline(Data( Baseline(demographic(and(clinical(characteris+cs(for(each(group(

Variables/Outcomes( Report(numbers(of(outcome(events(or(summary(measures(over(+me(

Main(results( Give(unadjusted(es+mates(and(if(applicable,(confounderFadjusted(es+mates(and(their(precision.((

Adverse(effects((for(Experimental(Designs)(

Readers(need(informa+on(on(poten+al(harm(as(well(as(benefit(

145(

Page 144: Principles of Scientific Writing for an International Audience

Results(examples(

T h e( n e x t ( s e v e r a l ( s l i d e s(demonstrate( different( ways( to(present(results(

146(

Page 145: Principles of Scientific Writing for an International Audience

Results:(CONSORT(Flow(

Eligible((NonFeligible(Declined(

Alloca+on(using(randomiza+on(scheme(

FollowFup(

Included(in(analysis(

147(

Page 146: Principles of Scientific Writing for an International Audience

Results(–(sample(study(flow(

148(

Page 147: Principles of Scientific Writing for an International Audience

Results(–(baseline(comparison(

149(

Page 148: Principles of Scientific Writing for an International Audience

Results:(Primary(outcome((RCT)(

150(

Page 149: Principles of Scientific Writing for an International Audience

Results(–(primary(outcomes((RCT)(

151(

Page 150: Principles of Scientific Writing for an International Audience

Results:(Primary(outcome((RCT)(

152(

Page 151: Principles of Scientific Writing for an International Audience

Results(–(primary(outcome((cohort)(

153(

Page 152: Principles of Scientific Writing for an International Audience

Primary(outcome((alterna+ve(figure)(

154(

Page 153: Principles of Scientific Writing for an International Audience

Primary(Efficacy(End(Point((RCT)(

155(

Page 154: Principles of Scientific Writing for an International Audience

Results(–(primary(outcome((CrossFsec+onal) ((

156(

Page 155: Principles of Scientific Writing for an International Audience

Regression(with(primary(outcomes((CrossFsec+onal(study)(

157(

Page 156: Principles of Scientific Writing for an International Audience

Results(–(Regression(with(OddsFRa+os(

158(

Page 157: Principles of Scientific Writing for an International Audience

ResultsFReport(Adverse(Effects(

“The( propor+on(of( pa+ents( experiencing( any( adverse( event(was( similar( between( the( rBPI21( [recombinant( bactericidal/permeabilityFincreasing( protein]( and( placebo( groups:( 168((88.4%)( of( 190( and( 180( (88.7%)( of( 203,( respec+vely,( and( it(was( lower( in( pa+ents( treated( with( rBPI21( than( in( those(treated( with( placebo( for( 11( of( 12( body( systems( …( the(propor+on(of( pa+ents( experiencing( a( severe( adverse( event,(as( judged(by( the( inves+gators,(was(numerically( lower( in( the(rBPI21( group( than( the( placebo( group:( 53( (27.9%)( of( 190(versus( 74( (36.5%)( of( 203( pa+ents,( respec+vely.( There(were(only( three( serious( adverse( events( reported( as( drugFrelated(and(they(all(occurred(in(the(placebo(group.”(

159(

Page 158: Principles of Scientific Writing for an International Audience

Discussion(

•  Dis+ll(the(essence(of(your(study(o  ReFstate(key(results(o  State(main(conclusion(

! Be(clear(about(why(results(support(the(conclusion(! Maintain(connec+on(with(the(purpose(of(the(study(

•  Interpret(your(study(in(the(context(of(the(literature(o  Compare(with(results(of/methods(used(in(related(studies(o  Emphasize(strengths(of(your(study(and(what(is(new(

•  State(limita+ons/caveats((frankly,(without(apology)(•  Make(recommenda+ons(

o  Changes(in(prac+ce/policy(o  Future(studies,(including(some(specifics((e.g.(study(method)(

Purpose:(to(interpret(your(results(and(jus+fy(your(interpreta+on(

Oaen(requires(just(four(or(five(paragraphs(160(

Page 159: Principles of Scientific Writing for an International Audience

Discussion(Checklist(Dis2ll*the*essence*of*study*

a.   Restate*key*results*b.   State*main*conclusion*

Z*Be*clear*about*why*results*support*the*conclusion.*Z*Maintain*connec2on*with*purpose*of*the*study.

*

Interpret*your*study*in*the*context*of*the*literature*a.   Compare*with*results*of/methods*used*in*related*studies*b.   Emphasize*strengths*of*your*study,*and*what*is*new

(

State*limita2ons/caveats*(use*examples)*Discuss*limita2ons*of*the*study,*taking*into*account*sources*of*poten2al*bias*or*imprecision.*Discuss*both*direc2on*and*magnitude*of*any*poten2al*bias

(

Make*recommenda2ons*a.   changes*in*prac2ce/policy*b.   future*studies,*including*some*specifics*(e.g.*study*method)

(

161(

Page 160: Principles of Scientific Writing for an International Audience

Discussion((Examples)(During(periods(of(seasonal(influenza(ac+vity,(we(found(moderately(ac+ve((1.5–2.9(METs/day)(and(ac+ve((≥3.0(METs/day)(individuals(to(be(approximately(15%(less(likely(to(have(an(influenzaFcoded(physician(office(or(emergency(department(visit(compared(to(inac+ve(individuals.(When(stra+fied(by(age,(we(observed(similar(findings(among(individuals(<65(years(but(not(≥65(years((((Among(individuals(<65(years,(moderately(ac+ve(and(ac+ve(individuals(were(not(more(likely(than(inac+ve(individuals(to(visit(physicians(for(nonFinfluenzaFrelated(condi+ons(such(as(derma++s(or(periodic(health(examina+ons(during(influenza(season…(

KEY(RESULTS(

MAIN(CONCLUSIONS(

162(

Page 161: Principles of Scientific Writing for an International Audience

Discussion((Examples)(

Aging( is( linked( to( declines( in( the( ability( to( defend(against(pathogens([40],(and(has(been(associated(with(increased( morbidity( and( mortality( from( infec+ous(diseases( in( the( elderly( [40]–[41].( Addi+onally,( ageFrelated( declines( in( immune( response( to( influenza(vaccines( are( well( documented( [42]–[44].( The(reduced(immune(func+on(of(the(elderly(may(prevent(them( from( receiving( any( immune( system( benefits(from( physical( ac+vity.( [Comparison* with* other*studies]*

163(

Page 162: Principles of Scientific Writing for an International Audience

Discussion((Examples)(To( our( knowledge,( this( is( the( first( epidemiologic( study( that( has(

examined( the( rela6onship( between( physical( ac6vity( and(

influenzaYrelated(morbidity(during( seasonal( influenza(epidemics.(

Previous(studies(have(mostly(focused(on(upper(respiratory(tract(infec+ons( (URTIs)(with( an( emphasis( on( athletes( [4],( and( only( a(few( focused( on( the( general( popula+on( [12],( [19],( [45].( Our(finding(of(a(15%(reduc+on(in(influenzaFcoded(outpa+ent(visits(is(similar( to( the( 20%( reduc+on( in( URTIs( observed( in( popula+onFbased( studies,( although( those( studies( used( selfFreported(outcome(measures([12],([19],([45].(Only(one(other(study(assessed(the(associa6on(between(physical(ac6vity(and( influenza,(and( the(

outcome( was( influenzaYassociated( mortality( [9].( Although( a(

beneficial(effect(was(found,(our(study(suggests(a(protec6ve(effect(

at(a(much(earlier(stage(than(mortality.(164(

Page 163: Principles of Scientific Writing for an International Audience

Discussion((Examples)(F(limita+ons(

This(study(had(several(limita+ons.(First,(our(outcome(

measure(was(influenzaYcoded(outpa6ent(visits(rather(

than(laboratoryYconfirmed(influenza(infec6ons,(which(would(be(the(most(ideal(outcome(measure(

A(second(limita+on(is(that(measurement(of(physical(

ac6vity(and(certain(covariates(relied(on(selfYreport,(and(verifica6on(of(subject(responses(was(not(possible(

(First,(we(are(limited(in(our(ability(to(adequately(es+mate(an(associa+on(between(stone(history(and(renal(func+on(in(young(adults(due(to(a(lack(of(data(on(stone(formers(less(than(age(30(

165(

Page 164: Principles of Scientific Writing for an International Audience

Discussion(F(Recommenda+ons(

Future( research( should( ideally( use( laboratoryFconfirmed( influenza( outcomes( to( confirm( the(associa+on( between( physical( ac+vity( and(influenza(infec+on.(Public(health(authori+es(and(clinicians(should(work(toward(a(common(goal(of(increasing( physical( ac+vity( and( the( public’s(awareness( of( its( benefits.( These( ac+ons( may(help( to( mi+gate( the( health( and( economic(burden(caused(by(influenza.((

166(

Page 165: Principles of Scientific Writing for an International Audience

Discussion(F(Recommenda+ons(

(

Further(work( in( alternate( study( samples( is( needed(to( validate( this( finding( and( to( determine( the(mechanisms( for( the( associa+on( between( kidney(stones(and(decreased(GFR.(However,(this(is(the(first(study( to( show( such( a( connec+on( in( a( na+onally(representa+ve( sample( of( the( United( States(popula+on.( Given( our( observa+ons,( the( serious(nature(of(renal(disease(and(the(increasing(incidence(of( nephrolithiasis( in( the( United( States,( further(inves+ga+on(is(warranted.(

167(

Page 166: Principles of Scientific Writing for an International Audience

Abstract(

Purpose:(to(highlight(key(points(from(major(sec+ons(of(the(ar+cle(

Emphasize(what(is(new(and(useful(

Component* Abstracted*from*

Major(purpose(of(study( (((Introduc+on(

Basic(procedures( (((Methods(

Main(findings( (((Results(

Principal(conclusions( (((Discussion(

168(

Page 167: Principles of Scientific Writing for an International Audience

Synopsis(–(Find(weaknesses(

Reliability of information about risk factors of chronic diseases collected in Missouri through the Behavioral Risk Factors Surveillance System. Synopsis (initial version) The Behavioral Risk Factors Surveillance System is widely used by health care authorities of the States to measure the prevalence of risk factors of chronic diseases. Despite its extensive utilization, only a few studies that assess reliability and validity of collected data have been conducted. A double testing study was carried out in the State of Missouri to assess reliability of information collected through the System. Authors repeatedly interviewed 222 people by phone, who passed full interview in March-April 1993. The repeated interview was conducted after 6-30 days following the first one. Repeatability of results was high for demographic data (kappa 0.85-1.00). Reliability of information about chronic diseases and risk factors thereof was also high. Kappa values ranged from 0.82 for the question about hypertension up to 1.00 for the question about smoking at that moment. In respect of the cancer survey procedures the reliability was lower for the knowledge of prostate cancer detection tests (kappa 0.21), than the tests used to diagnose cancer in women (mammography and smears). The question about attitude to smoking showed lower reliability than the question about actions to combat smoking. In general our data demonstrate flexibility of the System and its applicability to collecting information.

Page 168: Principles of Scientific Writing for an International Audience

The Behavioral Risk Factors Surveillance System is widely used by health care authorities of the States to measure the prevalence of risk factors of chronic diseases. We carried out a double testing study to assess reliability of information collected through the System in the State of Missouri. We repeatedly interviewed 222 people by phone, who passed full interview in March-April 1993. The repeated interview was conducted after 6-30 days following the first one. Repeatability of results was high for demographic data (kappa 0.85-1.00). Reliability of information about chronic diseases and risk factors thereof was also high. Kappa values ranged from 0.82 for the question about hypertension up to 1.00 for the question about smoking at that moment. In respect of the cancer survey procedures the reliability was lower for the knowledge of prostate cancer detection tests (kappa 0.21), than the tests used to diagnose cancer in women (mammography and smears). The question about attitude to smoking showed lower reliability than the question about actions to combat smoking.

Synopsis(–(Published(version:(Find(weaknesses(

Page 169: Principles of Scientific Writing for an International Audience

Introduction. Although tests to detect blood in feces are widely used to diagnose rectal cancer, there are no evidences that such use can result into decrease of mortality of this type of cancer. We conducted a randomized survey of the use of the method and showed its efficiency. Methods. 46,551 participants of the survey aged 50-80 were randomly selected either for the control group or for one of the test groups. The rectal cancer screening was carried out once a years in the first group, and once in two years in the second one. Those with positive test results passed through additional examination, including colonoscopy. Mortality statistics were collected for all participants over 13 years observation period. A group of experts determined causes of death, and an autopsist (pathologist) determined a stage of cancer for each case. Variations in mortality of rectal cancer were assessed by special statistical methods. Results. Total mortality of rectal cancer over the 13 year period was worth 5.88 per 1,000 (95% confidence interval 4.61-7.15) in the annually screened group, 8.44 (95% confidence interval 6.82-9.84) in the biannually screened group, and 8.83 (95% confidence interval 7.26-10.40) in the control group. This indicator in the first screened group (not the second one) was certainly lower as compared to the control group. This group showed detection of cancer at earlier stage, and the forecast of the survival rate in patients was better along with decrease of mortality. Conclusions. Annual tests to detect blood in feces decreased total mortality of rectal cancer by 33% within 13 years.

DECREASE OF MORTALITY OF RECTAL CANCER BY IMPLEMENTATION OF SCREENING FOR BLOOD IN FECES

Structured(Synopsis(

Page 170: Principles of Scientific Writing for an International Audience

Finalizing(the(paper(and(submission(

•  Drag(a(+tle(•  Wri+ng(and(edi+ng(process(

•  Picking(a(journal(•  Last(sec+ons(:((

– References(– Special(men+on(

•  Transla+on(

172(

Page 171: Principles of Scientific Writing for an International Audience

Title(

What(goes(into(the(+tle?(

•  The(topic((T)(–(study(subjects(and(seing(o  Who,(what,(when,(where(

•  In(addi+on,(chose(one(or(two(among:(o  M(–(Methods(

o  R(–(Results(

o  C(–(Conclusions(

o  N(–(name(of(study(or(data(set(

Purpose:(to(provide(a(brief,(informa+ve(summary(that(will(asract(your(target(audience(

Highlight(what(is(new(and(useful(173(

Page 172: Principles of Scientific Writing for an International Audience

Title(examples(

Title*•  Longitudinal(evalua6on(of(prostrateY

specific(an6gen(levels(in(men(with(and(

without(prostrate(disease(

o  An(injury(preven+on(program(in(an(AfricanFAmerican(community(

•  Smoking,(pregnancy,(and(source(of(preY

natal(care:(Results(from(the(Pregnancy(

Risk(Assessment(Monitoring(System(

o  Reduc+on(of(highFrisk(sexual(behavior(among(heterosexuals(undergoing(HIV(an+body(tes+ng:(A(randomized(clinical(trial(

******T*******M*******R*******C*******N*

•  +((((((((+((

o  +((

•  +(((((((((((((((((((((((((((((((((((+((

o  +((((((((+(((((((?(

174(

Page 173: Principles of Scientific Writing for an International Audience

Massive(mailing(does(not(effect(the(use(of(vaccines(among((MedicAir(Medical(insurance(recipients((Nurses(stress(factors(in(neonatal(Intensive(Case(Units:(American(Study((Experience(and(sa+sfac+on(of(primary(care,(secondary(Analysis(with(mul+level(modeling(((HIV(mortality(and(infec+vity(in(India:(assessment(of((na+onalFrepresenta+ve(census(1.1(mln(of(residents(

Title * ( ( ( ( ((((((((((((((((((T(((((M((((((R((((((C(((((((N((

(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((

175

Examples(of(+tles:(Your(opinion?(

Page 174: Principles of Scientific Writing for an International Audience

Racial(difference(of(Survival(with(Oral(cancer(in(Georgia((Time(of(experiment(implementa+on:(Racial(difference(of(Survival(with(Oral(cancer(in(Georgia:(1978F2001((Which(race(s)(under(higher(risk?((Reduced(survival(among(AfroFAmerican(pa+ents(with(oral(cancer(in(Georgia:(1978F2001((The(analysis(controlled(the(major(risk(factors:(Reduced(survival(among(AfroFAmerican(pa+ents(with(oral(cancer(in(Georgia(ager(Risk(Factors(Control:(1978F2001((Data(source?(Reduced(survival(among(AfroFAmerican(pa+ents(with(oral(cancer(in(Georgia(ager(Risk(Factor(Control:(Georgia(Registra+on(Index(SEER,(1978F2001((The(higher(risk(limited(by(several(subgroups(of(AfroFAmerican(pa+ents:(Reduced(survival(among(subgroups(of(AfroFAmerican(pa+ents(with(oral(cancer(in(Georgia(ager(Risk(Factor(Control:(Georgia(Registra+on(Index(SEER,(1978F2001(

((

176

Page 175: Principles of Scientific Writing for an International Audience

Bri2sh*Medical*Journal*(BMJ):*The(+tle(must(include(study(design(if(presented(as(an(original(study(*American*Journal*of*Preven2ve*Medicine*Title(must(be(brief(but(informa+ve,(underline(but(not(describe,(serve(as(a(shortcut(but(not(an(offer,(reflect(what(was(done,(do(not(use(verbs,(include(nouns(for(easier(search,(do(not(use(symbols(or(abbrevia+ons(

(

*ICMJE*(Interna2onal*Commidee*of*Medical*Journals*Editors)*:*Short(+tles(easier(to(read.(Too(short(+tles(may(lack(the(informa+on(about,(for(example,(the(study(design.(Authors(encouraged(to(include(all(possible(informa+on(into(the(+tle(which(will(make(the(search(more(sensible(and(relevant.*

Title(requirements(

Page 176: Principles of Scientific Writing for an International Audience

Wri+ng(the(ar+cle(and(submiing(it(to(a(journal(

178(

Page 177: Principles of Scientific Writing for an International Audience

Wri+ng(and(submiing(the(ar+cle(

•  Conduct(literature(review(•  Start(the(paper!(•  Conduct(study/analyze(data(•  Organize/summarize(results(succinctly(

•  Get(early,(frequent(feedback((in(pieces)(•  Formulate(your(key(message(

•  Apply(the(“new/useful”(test(•  Choose(your(target(audience(•  Choose(your(target(journal(•  Read(journal(instruc+ons(to(authors(

179(

Page 178: Principles of Scientific Writing for an International Audience

Wri+ng(and(submiing(the(ar+cle(

•  Drag((and(debug)(an(abstract(•  Write(the(first(drag(

•  Master(the(literature(

•  Relearn,(rethink,(and(rewrite(•  …and(rewrite,(rewrite,(rewrite(•  How(long?(•  Cri+cally(review(and(finalize(the(abstract(•  Asend(to(the(details(•  Submit(ar+cle(to(the(target(journal(

•  Have(a(“Plan(B”(180(

Page 179: Principles of Scientific Writing for an International Audience

Conduct(literature(review(

•  Google(scholar(•  PubMed(–(try(“Single(Cita+on(Matcher”(•  Web(of(Knowledge(•  NIHFfunded(research((RePORTER)(•  Contact(leading(inves+gators(to(learn(about(inFpress(or(unpublished(work(

•  Scopus(•  Medline.ru(•  Elibrary.ru(

181(

Page 180: Principles of Scientific Writing for an International Audience

Start(the(paper!(

•  Yes,(even(before(you(do(the(study(•  Drag(the(introduc+on(–(perhaps(borrow(from(a(study(protocol(or(grant(proposal(that(you(already(wrote(

•  Drag(dummy(table(shells(and(figure(axes(for(Results(

•  Decide(which(sta+s+cal(methods(you(may(need(–(may(dictate(study(design(

182(

Page 181: Principles of Scientific Writing for an International Audience

Conduct(study/analyze(data(

183(

Page 182: Principles of Scientific Writing for an International Audience

Organize/summarize(results(succinctly(

•  Fill(in(dummy(tables(and(figures(with(real(data(

•  Drag(addi+onal(tables(and(figures(if(needed(–(look(at(published(ar+cles(for(poten+al(templates(

•  Summarize(each(table(or(figure(in(a(single(sentence(

184(

Page 183: Principles of Scientific Writing for an International Audience

Get(early,(frequent(feedback((in(pieces)(

•  Ask(coauthors/colleagues(if(your(tables/figures(and(text(summaries(are(clear/concise/compelling(

•  Give(presenta+ons(to(colleagues(and(at(conferences(

•  The(more(hurdles(you(clear(before(you(submit(your(paper(to(a(journal,(the(fewer(you(will(be(asked(to(clear(during(the(review(process(

•  Don’t(wait(for(a(complete(drag(to(begin(geing(feedback(

185(

Page 184: Principles of Scientific Writing for an International Audience

Formulate(your(key(message(

•  Keep(it(simple;(try(to(boil(down(to(a(single(sentence(

•  Your(message(must(contain(something(new(and(useful*

•  Make(sure(your(results(support(your(key(message(

•  The(message(may(change(as(you(develop(the(paper(

186(

Page 185: Principles of Scientific Writing for an International Audience

Apply(the(“new/useful”(test(

•  Journal(editors(are(interested(in(new(informa+on(that(is(useful(to(their(target(audience(

•  Does(your(study(meet(these(criteria?(

•  If(not,(the(effort(of(wri+ng(a(manuscript(may(not(be(warranted(

•  If(yes…(

187(

Page 186: Principles of Scientific Writing for an International Audience

Choose(your(target(audience(

What(audience(is(most(interested(in(your(message?(

o Clinicians?(

o Public(health(prac++oners?(

o Basic(scien+sts?(

o A(broad(audience?(

188(

Page 187: Principles of Scientific Writing for an International Audience

Choose(your(target(journal(

•  Journal(impact(factor(

•  Select(based(on:(o  Match(with(target(audience(

o  Strength(of(your(ar+cle(

•  Consider(aiming(high(–(reviewer(comments(from(a(highFlevel(journal(can(be(valuable(

•  However,(aiming(high(with(data(that(are(geing(“stale”(is(risky(

(189(

Page 188: Principles of Scientific Writing for an International Audience

Read(journal(instruc+ons(to(authors(

•  Find(your(target(journal(“instruc+ons(for(authors”(on(the(Internet(or(in(an(issue(of(the(journal(

•  Is(your(key(message(relevant(to(the(target(journal’s(mission(statement?(

190(

Page 189: Principles of Scientific Writing for an International Audience

Drag((and(debug)(an(abstract(

•  Check(for(internal(consistency(o  Logical(flow(from(Purpose(to(Methods(to(Results(to(Conclusion?(

o  Conclusion(consistent(with(the(Purpose?(

•  If(you(see(flaws(in(the(Abstract,(ask(yourself:(o  Do(I(need(to(do(addi+onal(analyses?(

o  Addi+onal(literature(review?(

o  Addi+onal(thinking?(

191(

Page 190: Principles of Scientific Writing for an International Audience

Write(the(first(drag(

•  Write(for(your(target(audience((use(appropriate(terminology(or(jargon)(

•  Consider(using(an(outline(•  Don’t(spend(too(much(+me(on(the(grammar,(syntax,(or(details((only(you(need(to(understand(the(first(drag)(

192(

Page 191: Principles of Scientific Writing for an International Audience

Master(the(literature(

•  As(you(obtain(feedback,(colleagues(will(direct(you(to(new(references(

•  Update(your(PubMed(Single(Cita+on(Matcher(search((

•  Russian(Scien+fic(Cita+on(Index(•  (and/or(local(UZ(equivalent)(

193(

Page 192: Principles of Scientific Writing for an International Audience

Relearn,(rethink,(and(rewrite(

•  As(you(master(the(literature,(you(will(see(your(work(in(a(new(light(

•  Transmit(this(new(thinking(to(your(manuscript(

194(

Page 193: Principles of Scientific Writing for an International Audience

…(and(rewrite,(rewrite,(rewrite(

•  Most(papers(require(at(least(five(drags,(maybe(ten(–(save(and(date(them(all(

•  You(may(need(to(revise(your(key(message(

•  Perhaps(consider(changing(target(audience,(target(journal(

•  Perhaps(your(paper(is(now(beser(than(you(ever(imagined,(and(you(want(to(aim(for(a(higherFcircula+on/impact(journal(

195(

Page 194: Principles of Scientific Writing for an International Audience

How(long?(

•  How(long(should(your(manuscript(be?(

•  Follow(guidance(in(target(journal’s(instruc+ons(for(authors(

•  “Shorter(papers(get(luckier(faster”(

196(

Page 195: Principles of Scientific Writing for an International Audience

Cri+cally(review(and(finalize(the(abstract(

•  Check(again(for(internal(consistency((as(described(previously)(

•  Make(sure(the(abstract(is(fully*consistent(with(the(body(of(the(ar+cle(

197(

Page 196: Principles of Scientific Writing for an International Audience

Asend(to(the(details(

•  Carefully(review(and(comply(with(target(journal’s(instruc+ons(for(authors(

•  Call/eFmail(the(journal(if(you(s+ll(have(ques+ons(

198(

Page 197: Principles of Scientific Writing for an International Audience

Submit(ar+cle(to(target(journal(

199(

Page 198: Principles of Scientific Writing for an International Audience

Have(a(Plan(B(

Decide(on(your(next(target(journal(in(case(you(receive(a(rejec+on(

200(

Page 199: Principles of Scientific Writing for an International Audience

About(the(importance(of(opportunity(and(impact(

•  As(to(how(being(opportunis+c(can(lead(to(high(acceptability(of(research(grants(and(scien+fic(outputs((examples(of(bioterrorism(research(in(the(US(ager(2001,(or(the(large(number(of(papers(and(research(that(focus(on(Q(fever,(for(example,(ager(the(outbreak(in(the(Netherlands).(

•  But(watch(out(because(the(search(for(high(impact(publica+ons(can(lead(to(“miscarriages”((the(case(of(Wakefield)(

201(

Page 200: Principles of Scientific Writing for an International Audience

Wri+ng(for(Grant(Proposals(

Eugene(Elbert,(MS((Johns(Hopkins(University,(U.S.A.(

August(2012((

Page 201: Principles of Scientific Writing for an International Audience

Phases(of(Grant(Wri+ng(

1.  Planning 2.  Preparing 3.  Writing 4.  Submitting

203(

Page 202: Principles of Scientific Writing for an International Audience

1.(Planning(

•  Research funder’s program areas and priorities. –  What other projects have been funded?

•  Read the instructions! •  For a specific RFP (request for proposals), READ

the RFP! •  Does your project match the funder’s needs? •  Do you have the capacity to do the proposed

project? •  Be familiar with the submission process

–  Is there an online submission process?

Page 203: Principles of Scientific Writing for an International Audience

2.(Preparing(

•  Develop(your(idea(–  Is(it(new?(Interes+ng?((– What(are(the(specific(aims?(– What(is(your(research(design?(– What(will(the(outcomes(be?(

•  What(will(it(take(to(make(it(successful?(– Who(will(lead(the(project?((– Who(else(will(be(involved?((

•  Internal(staff(and(external(partners(– How(long(will(it(take(to(accomplish?(– How(much(money(will(it(take?(

Page 204: Principles of Scientific Writing for an International Audience

2.(Preparing((con+nued)(

•  Get(organized(– Read(the(RFP(again(–  Is(a(leser(of(intent((LOI)(needed(before(the(full(proposal(can(be(submised?(

•  Develop(a(+meline(for(wri+ng(the(grant(proposal(– Be aware of deadlines. Start early!$

•  Assign(roles(in(the(proposal(process(– Will(different(people(write(different(parts?(

206(

Page 205: Principles of Scientific Writing for an International Audience

3.(Wri+ng(

•  Follow(direc+ons(– Are(you(including(everything(as(requested?(–  Pay(asen+on(to(format(and(page(limits.(

•  Make(it(easy(for(the(reviewer(to(read(–  Be(clear(and(concise(– Use(buzzwords(that(will(stand(out(and(show(your(work(is(aligned(with(the(funder’s(goals(and(mission.(

– Do(not(use(jargon(–  Spell(out(abbrevia+ons(and(acronyms(

207(

Page 206: Principles of Scientific Writing for an International Audience

3.(Wri+ng((con+nued)(

•  Title(– Make(it(interes+ng(and(clear(

– Does(it(capture(what(you(will(do?(– Look(at(+tles(of(other(projects(the(funder(has(funded(for(format(

•  Know(the(review(process(– How(will(the(proposal(be(scored?(–  Is(one(part(more(important(than(another?(

208(

Page 207: Principles of Scientific Writing for an International Audience

What(the(customer(wants…(

209(

Innova+on((•  New(methods(for(old(problems((examples)(

•  Old(methods((elsewhere)(for(old(problems((examples)(

•  Any(method(for(new(problems((BE(THE(FIRST)(

o First(papers,(no(maser(how(precarious(become(seminal(ones((1)((

((1) Ugbomoiko et al. 2008. Parasites of importance for human health in Nigerian dogs: high prevalence and limited knowledge of pet owners. BMC Vet Research.

Page 208: Principles of Scientific Writing for an International Audience

Parts(of(a(Grant(Proposal(

NOTE: These are are different for different funders – read the instructions! 1.  Cover(leser(2.  Summary(or(abstract(3.  Problem(or(Needs(statement(4.  Project(descrip+on(

•  Introduc+on(•  Objec+ves((•  Methods(

5.  Evalua+on(6.  Key(personnel(7.  Budget(

210(

Page 209: Principles of Scientific Writing for an International Audience

The(Sec+ons(

211(

1.   Cover*leder*–  One(page(leser(addressed(to(the(funding(source(

and(signed(by(the(highest(official(

2.   Summary*or*abstract*3.   Problem*or*Needs*Statement*

–  State(the(problem(with(facts(and(evidence(that(support(the(need(for(your(project.(

–  Be(sure(to(use(accurate(data.(

Page 210: Principles of Scientific Writing for an International Audience

The(Sec+ons((con+nued)(

4.  Project Description –  Introduc2on((

•  Provide(history(of(organiza+on(and(experience(of(your(team(

•  How(does(this(work(fit(into(what(has(been(done(previously(by(you(and(others?(

–  Objec2ves**•  List(2F4(Specific(Aims(of(the(project(•  Define(the(measurable(outcomes(of(your(program.(

–  Methods**•  What(ac+vi+es(that(will(take(place(to(achieve(the(objec+ves?(

•  What(is(the(research(design?(

212(

Page 211: Principles of Scientific Writing for an International Audience

The(Sec+ons((con+nued)(

5.*Evalua2on*–  How(you(will(measure(the(success(of(your(project?(–  Plan(for(con+nua+on(beyond(the(grant(period(

6.*Key*personnel*–  Describe(the(people(needed(to(do(project(– What(are(the(qualifica+ons(of(the(project(director(and(others?(

– What(are(their(roles(on(the(project(((Director,(Program(Manager,(Sta+s+cian,(etc.(

7.*Budget*–  How(much(will(it(cost(to(conduct(the(project?(–  Be(aware(of(funding(limitsF(do(not(ask(for(more(than(they(are(giving(out(

–  Provide(jus+fica+on(of(costs(*

213(

Page 212: Principles of Scientific Writing for an International Audience

4.(Submiing(

•  Review your work – Have you followed instructions? – Ask someone from outside of your team to

review your proposal to get a new perspective •  Revise

– Correct any errors – Make as clear and concise as possible

•  Submit – Follow directions

214(

Page 213: Principles of Scientific Writing for an International Audience

More(Informa+on(

Grant(Wri+ng(Tips(Sheet([hsp://grants1.nih.gov/grants/grant_+ps.htm]((Common(Grant(Applica+on((Na+onal(Network(of(Grantmakers)([hsp://www.nng.org/cga.html]((EPA(Purdue(University(GrantFWri+ng(Tutorial((Environmental(Protec+on(Agency)([hsp://www.purdue.edu/envirosog/grants/src/msieopen.htm]((Sample(proposals:([hsp://www.npguides.org/guide/sample_proposals.htm]((Grants(and(Grant(Proposal(Wri+ng((St.(Louis(University)([hsp://eweb.slu.edu/papers2/grant01v32e.pdf]((All(About(Grants(Tutorials((Na+onal(Ins+tutes(of(Health)([hsp://www.niaid.nih.gov/ncn/grants/default.htm]((

215(