The most successful men in the end are those whose success is the result of steady accretion. It is the man who carefully advances step by step, with his mind becoming wider and wider, and progressively better able to grasp any theme or situation -persevering in what he knows to be practical, and concentrating his thought upon it. This is the man who is bound to succeed in the greatest degree. -Alexander Graham Bell
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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