Posted: February 24th, 2017

The prevalence of a disease is two times greater in women than in men, but the incidence rates are the same in men and women. Which of the following statements may best explain this situation?

. The two major purposes of random assignment in a clinical trial are to (select two): (4 pts) A. ensure that study subjects are representative of the general population B. facilitate double-blinding C. ensure that the study groups are comparable on baseline characteristics D. facilitate measurement of outcome variables E. reduce selection bias in allocation of treatment

19. The prevalence of a disease is two times greater in women than in men, but the incidence rates are the same in men and women. Which of the following statements may best explain this situation? (3 pts) A. The duration of the disease is shorter in women. B. The case-fatality rate is lower in women. C. The prevalence of risk factors for developing the disease is greater in men. D. The age-adjusted mortality rate is higher in women. E. The life-expectancy following disease diagnosis is shorter in women.

20. If Disease A has an incidence rate of 17 cases per 100,000 per year and an average duration of 3 years, how many existing cases of the disease will be found in a population of 200,000 people? (3 pts) A. 17 cases B. 34 cases C. 51 cases D. 102 cases E. Cannot be determined from these data