EPI EXAM 3 ACTUAL QUESTIONS AND ANSWERS

EPI EXAM 3 ACTUAL QUESTIONS AND ANSWERS
What is a prospective cohory study? - CORRECT ANSWER✅✅When disease and exposure is not known
at beggining of study



Advantages of prospective cohort - CORRECT ANSWER✅✅avoids bias with selective recall



Advantages of restrospective cohort - CORRECT ANSWER✅✅Cheap, fast, data already finished



Disadvantages of retrospective cohort - CORRECT ANSWER✅✅Misclassification bias



Advantages of population based cohort - CORRECT ANSWER✅✅Easy to study multiple exposures



Disadvantages of population based cohort - CORRECT ANSWER✅✅Recall bias, time consuming, full
pop. lists may not be available



Advantages of case control - CORRECT ANSWER✅✅Easy to measure rare diseases, long latency
diseases, time efficient, and good sample size



Disadvantages of case control - CORRECT ANSWER✅✅Poor temporal relationships, can't measure rare
exposures



Why can't RR be used in a case control study? - CORRECT ANSWER✅✅Whole population not used



True or false: OR is a good estimate of RR when controls are representative. - CORRECT
ANSWER✅✅True



True or false: OR is a good estimate of RR when disease occurs frequently. - CORRECT ANSWER✅✅False



True or false: OR is a good estimate of RR when disease DOESN'T occur frequently. - CORRECT
ANSWER✅✅True