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Why should medical students be interested in EPIDEMIOLOGY ?. Very basic concepts. What is EPIDEMIOLOGY ?.
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Why should medical students be interested inEPIDEMIOLOGY? Very basic concepts
What is EPIDEMIOLOGY? Epidemiology is the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to control of health problems. Last ed. Dictionary of Epidemiology
But can you imagine what is epidemiology like in clinical practiceby reading definition?Let's see some examplesFirst, I will show you observational data of mortality.
If you categorize the populations by age and compare mortality of Area A with that of Area B
The factors should be taken into consideration when you look at the data. agesexraceyear of birth.
Answer CDC revised classification system for HIV (AIDS) infection in 1993
Next example subjects: smokers: 1000non smokers: 1000of same age range, sex ratio status of lung cancer for 5 years were observed.
p=0.006 by Chi-square test Next example
p=1.0 by Chi-square test Non-smokers
p=1.0 by Chi-square test Smokers