Slide 1 Slide 2 Epidemiological studies Two types Observation Experiment Slide 3 Exposed Not exposed Disease occurrence Unethical to perform experiments on people if exposure…
1. Tamer Hifnawy MD. Dr.PH Associate Professor Public Health & Community Medicine Faculty of Medicine – BSU- Egypt College of Dentistry Taibah University- KSA Vice…
Slide 1 Cohort study Slide 2 What is a cohort? One of 10 divisions of a Roman legion Group of individuals – sharing same experience – followed up for specified period…