variables - isfahan university of medical sciences · ins12 344 ranking scale a nominal scale with...
TRANSCRIPT
![Page 1: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/1.jpg)
Variables
1
![Page 2: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/2.jpg)
![Page 3: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/3.jpg)
![Page 4: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/4.jpg)
4
Lecture Objectives
What is a variable?
Why discuss about variables?
Types of data
role of variables
![Page 5: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/5.jpg)
نام متغيرنقش متغير
واحد نوع متغير
اندازه گير ي
روش
اندازه گير كيفي كمي ي
![Page 6: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/6.jpg)
What Is a Variable ?
INS344 6
A characteristic varies
It is recorded in our study
![Page 7: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/7.jpg)
نام متغيرنقش متغير
واحد نوع متغير
اندازه گير ي
روش
اندازه گير كيفي كمي ي
![Page 8: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/8.jpg)
Types of Data
INS344 8
Continuous (پيوسته)
Discrete (گسسته)
Ordinal ( رتبه ای)
Nominal ( اسمی)
Numerical ( کمی)
Categorical ( کيفی)
![Page 9: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/9.jpg)
Scales of Measurement
علمی -1
غ ق جمع -2
جامع -3
رده کافی -4
مناسب -5
رده ی تعريف شده -6
قوی -7
![Page 10: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/10.jpg)
Scales of Measurement
INS344 10
Nominal
Ordinal
Interval
ratio Numerical ( کمی)
Categorical ( کيفی)
![Page 11: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/11.jpg)
Nominal
Ordinal
Interval
ratio
INS344 11
Classificatory
Names
Labels
![Page 12: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/12.jpg)
INS344 12
Ranking scale
A nominal scale with an implicit order
relationship among the measurement
The difference between two adjacent
categories is not the same through out
the scale
Nominal
Ordinal
Interval
ratio
![Page 13: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/13.jpg)
INS344 13
The unit of measurement and the zero
point ) starting point ) …..
The zero point does not mean the
lack of the characteristic
Nominal
Ordinal Interval ( فاصله ای)
ratio
![Page 14: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/14.jpg)
INS344 14
A true or absolute zero
The ratio between two values is a
meaningful measure of the relative
magnitude of the two measurements
Nominal
Ordinal
Interval Ratio (نسبتی )
![Page 15: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/15.jpg)
Scales of Measurement
INS344 15
Nominal
Ordinal
Interval
ratio Numerical ( کمی)
Categorical ( کيفی)
![Page 16: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/16.jpg)
Examples …
INS344 16
•Drug type
•Hb concentration
•Prevalence of Hepatitis B
•Amount of pure drug in different types of Ampicillin
•Number of deaths in year 1390
•Mortality
•Blood pressure
![Page 17: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/17.jpg)
![Page 18: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/18.jpg)
نام متغيرنقش متغير
واحد نوع متغير
اندازه گير ي
روش
اندازه گير كيفي كمي ي
![Page 19: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/19.jpg)
Types of Data
INS344 19
Continuous (پيوسته)
Discrete (گسسته)
Ordinal ( رتبه ای)
Nominal ( اسمی)
Numerical ( کمی)
Categorical ( کيفی)
![Page 20: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/20.jpg)
نام متغيرنقش متغير
واحد نوع متغير
اندازه گير ي
روش
اندازه گير كيفي كمي ي
![Page 21: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/21.jpg)
Roles of Variables
INS344 21
Main variable
Independent variable
Dependent variable
Background variable
Interventing variable
![Page 22: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/22.jpg)
INS344 22
A B
•Independent variable
•Dependent variable
•Background variable
•Extraneous variable
•Confounding variable
![Page 23: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/23.jpg)
INS344 23
A B
•Independent variable (مستقل )
•Dependent variable
•Background variable
•Extraneous variable
•Confounding variable
Exposure
Treatment
Risk factor
Cause
Study factor
predictor
![Page 24: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/24.jpg)
INS344 24
A B
•Independent variable •Dependent variable (وابسته)
•Background variable
•Extraneous variable
•Confounding variable
Outcome
Disease
Effect
Event
Response
Criterion
Exposure
Treatment
Risk factor
Cause
Study factor
predictor
![Page 25: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/25.jpg)
Chocolate
consumption
Nobel
prizes
NEJMon1211064
![Page 26: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/26.jpg)
UV Airborne pathogen
![Page 27: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/27.jpg)
INS344 27
A B
•Independent variable
•Dependent variable •Background variable ( زمينه ای)
•Extraneous variable
•Confounding variable
Background variable
![Page 28: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/28.jpg)
![Page 29: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/29.jpg)
INS344 29
L - DOPA Parkinson
•Independent variable
•Dependent variable •Background variable ( زمينه ای)
•Extraneous variable
•Confounding variable
Patients attitude
![Page 30: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/30.jpg)
INS344 30
Cigarette Stroke
•Independent variable
•Dependent variable •Background variable ( زمينه ای)
•Extraneous variable
•Confounding variable
Sex
![Page 31: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/31.jpg)
Examples …
INS344 31
•Bladder cancer . Vit A
•MI . HLP
•Lung cancer . smoking
•IQ . Fe
•Thyromegaly . Water iodine
•Blood group . Diabetes
![Page 32: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/32.jpg)
INS344 32
A B
C
•Independent variable
•Dependent variable
•Background variable •Extraneous variable (مزاحم)
•Confounding variable
![Page 33: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/33.jpg)
![Page 34: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/34.jpg)
INS344 34
HLP MI
Smoking
•Independent variable
•Dependent variable
•Background variable •Extraneous variable (مزاحم)
•Confounding variable
![Page 35: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/35.jpg)
INS344 35
Hot tea E. cancer
Smoking
•Independent variable
•Dependent variable
•Background variable •Extraneous variable (مزاحم)
•Confounding variable
![Page 36: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/36.jpg)
INS344 36
A B
C
•Independent variable
•Dependent variable
•Background variable
•Extraneous variable •Confounding variable (مخدوشگر)
![Page 37: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/37.jpg)
![Page 38: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/38.jpg)
INS344 38
coffee MI
smoking
•Independent variable
•Dependent variable
•Background variable
•Extraneous variable •Confounding variable (مخدوشگر)
![Page 39: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/39.jpg)
INS344 39
Opium IQ
smoking
•Independent variable
•Dependent variable
•Background variable
•Extraneous variable •Confounding variable (مخدوشگر)
![Page 40: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/40.jpg)
![Page 42: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/42.jpg)
INS344 42
gender Coronary
disease
smoking
Intermittent ( واسطه ای)
![Page 43: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/43.jpg)
INS344 43
diet Coronary
disease
LP
Intermittent ( واسطه ای)
![Page 44: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/44.jpg)
جدول متغير ها
![Page 45: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/45.jpg)
INS344 45
•Numbers of variables
•Qualitative Quantitative
![Page 46: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/46.jpg)
INS344 46
We think that Isfahanian
multipara women are at risk of
Anemia more than usual.
Anemia / Number of past pregnancies
Poor culture / Gender / City
![Page 47: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/47.jpg)
Learned or Not ?
INS344 47
What is a variable?
Why discuss about variables?
Types of data
Scales of measurement
role of variables
Movie
![Page 48: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/48.jpg)
![Page 49: Variables - Isfahan University of Medical Sciences · INS12 344 Ranking scale A nominal scale with an implicit order relationship among the measurement The difference between two](https://reader034.vdocuments.us/reader034/viewer/2022042113/5e8f73401739441fe87dd478/html5/thumbnails/49.jpg)
конец