This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Case control study estimates 
Select and explain. 
A. Only odd's ratio, B. Odds ratio and attributable risk, C. Relative risk, attributable risk, population attributable risk, D. Incidence, Relative risk, and attributable risk
A: Only odd's ratio
Answer: A: Only odd's ratio 
Explanation: Case-control studies is basically a comparison study. Cases and control must be comparable with respect to known "confounding factors "such as age, sex occupation, social status etc. The questions asked relate to personal characteristics and antecedent exposures which may be responsible for the condition studied. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 79