1. While investigating a point source epidemic it was found that 120 students ate five different foods (meat burgers, fried fish, steak, rice and fruit salad). The relative risk was calculated for all those five foods. It was concluded that fish was not responsible for this epidemic. The relative risk of fish is: a. 0.7 b. 1.2 c. 1.7 d. 3.0 e. 7.0 Key: True: a In a prospective study of the relationship between oral contraceptive use and the subsequent risk of developing endometrial cancer, a cohort of 1000 women were followed for 5 years. The results were as follows: A 245 B 75 C 50 D 630 A + C = 295 B + D = 705 n = 1000 2. What is the incidence rate (absolute risk) of endometrial cancer among who didn’t use oral contraceptives? a. 630 / (50 + 630) b. 75 / (245 + 75) c. 50 / (50 + 630) d. 245 / (245 + 75) e. Insufficient data Key: True: c 50/(50 + 630) In a prospective study of the relationship between oral contraceptive use and the subsequent risk of de...
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