This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
A women is exposed to multiple sex paners has 5 times increased risk for Carcinoma Cervix. The attributable risk is: 
Select and explain. 
A. 20%, B. 50%, C. 80%, D. 100%
C: 80%
Answer: C: 80% 
Explanation: ATTRIBUTABLE RISK signifies to what extent the incidence of any disease could be attributed to the risk factor in question. (Also termed as Risk Difference) AR= Incidence In Exposed - Incidence in Unexposed Incidence In Exposed AR helps in estimating to what extend will the incidence of any disease may decrease in a population if the causative agent is removed. Estimated by help of coho study. In this question, attributable risk can be calculated as follows: Assuming that incidence among unexposed women is x, then incidence among exposed women should be 5x. Therefore, 5x-x = 4/5= 80%. x Ref : Park's Textbook of Preventive and Social Medicine; 18th edition; Page-69