Question

Explain three major types of epidemiologic studies. Which is most likely to yield a valid result? Why?

Answer 1

1)Cohort study: Its a type of research to investigate the cause of any disease and focuses on the relationship between cause of the disease and its outcome. These studies are usually planned in advance.

2)Case control study: It is carried out after a disease has occurred. It used to study if an outcome is due to an exposure.

3)Prevalence:It is proportion of a particular population affected by a disease or a medical condition. It is a comparison between the number of people having the condition and total number of population studied.

Cohort study is the best as it helps to determine the risk of a disease before it occurs and helps to prevent diseases which when compared the other study can be done only after the disease has occurred.