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Statistical analysis of repeated outcomes of different types
Musoro, Z.J.
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Citation for published version (APA):Musoro, Z. J. (2016). Statistical analysis of repeated outcomes of different types.
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Acknowledgements
First of all, I am grateful to God almighty for the gift of good health and strength
bestowed upon me to complete this work. I wish to express my sincere gratitude to
my promoter Prof. dr. Aeilko H Zwinderman (Koos) and co-promoter Dr. Ronald B
Geskus for their aspiring guidance, constructive criticisms and valuable suggestions
in doing this project. I am especially immensely grateful for the patience and friendly
advice during the project. I also wish to say a big thank you to my co-authors,
especially Dr. Gerben ter Riet, Dr Milo Puhan, Dr Lara Siebeling, Prof. dr. Ameen
Abu-Hanna and Dr Michel Hof [MH] for sharing their illuminating views on issues
related to the projects we collaborated on. And to the members of the doctorate
committee, thank you for accepting to evaluate this thesis.
I would like to express gratitude to all members (past and present) of the KEBB
for their help and support. Annet and Gré, you were both very kind and were always
there to help, especially with the administrative tasks. Thank you so much. Dear
Anja, Rosa, Fleur, Erik, Iris, Teodora, Raha, Parvin, Annefloor, Eleonor, Jérémie,
Sapphire, Wouter and Marit thanks for the nice memories in and out of the KEBB.
To my office mates of J1B-207.1, thank you Shayan and Umesh for the wonderful
conversations we had over the years and for the various interesting "Friday projects".
Dicle and Simona it was a pleasure meeting you and I hope you both enjoy your stay
in J1B-207.1. Dear Nan, thank you for the friendly conversations and for allowing
me to join you during some of your statistical consultancy meetings. It was a great
experience. I would also like to thank MH and Victor Lih for being my paranymphs.
I wish to express my appreciation to my landlady, Dea, for providing me a quiet
and comfortable home throughout my PhD. Thank you for the wonderful care you
showed not only to me but also to Chella and Zerah. Felix Aweh, thanks for the good
times at Dea’s, recounting all those BHS stories, all the laughs and the good food.
A big thank you to members of the Love World Ministry choir (Amsterdam) for the
159
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160 Chapter 8. General conclusion
glorious times we shared in songs and in fellowship. I am thankful for the opportunity
and platform you gave to me to grow in "Kingdom music". I also wish to appreciate
Pastor Femi Adenuga and his lovely wife for their prayers and wonderful words of
encouragements over the years. Thank you all.
To the Kanjandas: Collins, Kathy, Nancy, Coleen, and the Tans: Cesar, Nolen,
and Naya, you were part of the reason why Chella and I had a successful "long distance
relationship" for about four years. Thanks for taking good care of Chella while I was
away. Friends as caring and trustworthy as you are a rare breed. Da Sylva, thanks
bro for the words of encouragement and for always being there for us. I would like to
appreciate all my friends and loved ones in the Netherlands, Belgium, the Philippines
and Cameroon for their moral support.
May I also thank my colleagues of the statistics and quality of life departments
at the EORTC HQ. I consider myself fortunate for having a chance to work with
extraordinary colleagues like you. Because of your wonderful personalities, it was
easy to integrate into the team. Looking forward to very productive collaborations.
Special thanks to Dr Andrew Bottomly and Corneel Coens for giving me some time
off work to prepare and defend my thesis.
To my parents Tamaji Musoro J. and Musoro Mary N., and my lovely sisters,
I am aware that the only thing most of you would know about my thesis is that
it involves "statistics" and "patient data". But this did not hinder your continuous
support and unceasing encouragement. I am sincerely grateful for all of that. Darlene,
you answered present each time we needed you. Merci petite sœur.
Tatay, thank you for always asking about the progress of my thesis and for your
constant encouragements. Nanay, thank you for traveling from the Philippines to
Hasselt to help us look after your granddaughter, Zerah, while I rounded up my
thesis. I am so sincerely grateful for your continuous love and support.
Finally to my lovely wife Chella and my pretty daughter Zerah, thank you for
your love, support and attention. Welcome Cale! You are an additional blessing to
our family. Chella, you have always believed in me and have stood by me all along.
It was not easy staying away from each other for such a long time. But now we can
proudly say "WE MADE IT!" Thank you mahal, I love you!
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Curriculum Vitae and scientific
publications
Jammbe Z. Musoro was born in 1983 at Ndu, North West region- Cameroon. After
graduating from Baptist High school Buea, Cameroon (2001), Jammbe obtained a
Bachelor of medical laboratory science at the University of Buea, Cameroon (2001-
2005). In 2005-2008 he practiced as a laboratory scientist/research assistant at the
Atlantic Medical Foundation Hospital Mutengene, Cameroon. He later studied at the
University of Hasselt, Belgium (2008-2010) where he obtained a Masters in Statistics:
Epidemiology and public health Methodology with distinction. From December 2010,
Jammbe started working on his PhD thesis under the supervision of Prof. dr. Aeilko H
Zwinderman and Dr. Ronald B Geskus at the Department of Clinical Epidemiology,
Biostatistics and Bioinformatics (KEBB) of the Academic Medical Center (AMC),
University of Amsterdam. Currently (2015), Jammbe is a statistician at the quality
of life and statistics departments of the European Organisation for Research and
Treatment of Cancer (EORTC) head quarters, Brussels-Belgium. He is working on
the Minimum Importance Difference (MID) project, which aims at providing a more
evidence-based approach to interpreting a meaningful change in the health-related
quality of life (HRQOL) scores of the EORTC QLQ-C30 questionnaires.
Andraud M., Lejeune, O., Musoro, J., Ogunjimi, B., Beutels, P., Niel Hens N.
(2012) Living on three time scales: The dynamics of plasma cell and antibody
populations illustrated for hepatitis A virus. PLoS Computational Biology. 8(3)
Musoro, J., Geskus, R., Zwinderman, A. (2014) A joint model for repeated events
of different types and multiple longitudinal outcomes with application to a
follow-up study of patients after kidney transplant. Biometrical Journal. DOI:
161
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162 Chapter 8. General conclusion
101002/bmj201300167.
Siebeling, L., Musoro, J., Geskus, R., Zoller, M., Muggensturm, P., Frei, A., Puhan,
M., ter Riet, G. (2014) Prediction of COPD-specific health-related quality of life
in primary care COPD patients. Primary care respiratory journal. 24, Article
number: 14060 doi:10.1038/npjpcrm.2014.60.
Musoro, J., Zwinderman, A., Puhan, M., ter Riet, G., Geskus, R.(2014) Validation
of prediction models based on lasso regression with multiply imputed data. BMC
Medical Research Methodology.14:116 DOI:10.1186/1471-2288-14-116
Musoro, J., Struijk, G.,Geskus, R., ten Berge, J., Zwinderman, A. (2015) Dynamic
prediction of recurrent events by landmarking, with application to a follow-up
study of patients after kidney transplant. Statistical Methods in Medical Research
DOI:10.1177/0962280216643563
Musoro, J., Zwinderman, A., Bosman, R., Abu-Hanna, A., Geskus, R. (2015) Dy-
namic prediction of mortality amongst patients in intensive care using the se-
quential organ failure assessment (SOFA) score: A joint competing risk survival
and longitudinal modelling approach. Statistica Neerlandica (under review)
M.H. Hof, J.Z. Musoro, R.B. Geskus, G.H. Struijk, I.J.M. ten Berge, and A.H.
Zwinderman (2015) Simulated maximum likelihood estimation in joint models
for multiple longitudinal markers and recurrent events of multiple types, in the
presence of a terminal event. Journal of Applied Statistics (under review)
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PhD Portfolio
PhD training
Courses year
World of science: Graduate school, University of Amsterdam 2010.
Survival data analysis: University of Hasselt 2010.
Advance course in Biostatistics: Graduate school, University of Amsterdam 2010.
Functional data analysis: ISCB Ottawa, Canada 2010
Analysis of interval-censored survival data: ISCB Bergen, Norway 2012.
Advance R programming: Statistics.com 2013.
Prediction models: ISCB Munich, Germany 2013.
INLA course : National Institute for Public Health and the Environment (RIVM) in Bilthoven, 2013.
the Netherlands
Prediction models: ISCB Munich, Germany 2013.
Unix course: Graduate school, University of Amsterdam 2014.
Extension of frailty models for recurrent or clustered survival data with prediction 2014.
(ISCB Vienna, Austria)
Weekly departmental seminars 2010-2015.
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164 Chapter 8. General conclusion
Presentations
Conference year
ISCB Utrecht, the Netherlands: Dynamic prediction of recurrent event data by landmarking 2015
with application to a follow-up study of patients after kidney transplant (Oral-Best paper award).
IBS Nijmegen, the Netherlands: Dynamic prediction of mortality amongst patients in 2015
intensive care using the sequential organ failure assessment (SOFA) score (Oral ).
ISCB Vienna, Austria: Validation of prediction models based on lasso regression with 2014
multiply imputed data (Oral).
ISCB Munich, Germany: Validation of prediction models based on penalized regression 2013
with multiply imputed data (Poster).
IBS St Andrews, Scotland: A Bayesian joint model for repeated events of different types 2013
and multiple biomarkers (Oral).
ISCB Bergen, Norway: A simulation study to investigate the performance of random effect 2012
variance estimates in repeated outcome data (Poster).
ISCB Bergen, Norway: Dynamic predictions of repeated events of different types by 2012
landmarking (Oral)
ISCB Ottawa, Canada Methods for analyzing data with multiple-repeated events and 2011
multiple biomarkers (Oral).
Membership
The international society for clinical biostatistics Since 2010
Netherlands society for statistics and operations research Since 2010
Awards
ISCB student conference award 2015
Others
ISCB conference assistant 2015
Organizer of Medical statistic PhD day (Netherlands) 2013
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Statistical analysis of repeatedoutcomes of different types
Statist
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Statistical
analysis of
repeated outcomes
of different typesdoor Jammbe Musoro
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