COMLEX II: Statistics Exam Questions With 100% Correct Answers.

COMLEX II: Statistics Exam Questions With 100% Correct Answers. How do you calculate relative risk? - answer[A/(A+B)]/[C/(C+D)] expresses the risk of disease in people exposed to a given factor What type of study uses relative risk to evaluate conclusions? - answercohort study what type of study uses odds ratio to evaluate conclusions? - answercase-control study what is the difference between case-control and cohort studies? - answercohort study: examines a group of subjects exposed to a given situation or factor; usually prospective case-control: retrospective comparison of patients with a disease to healthy controls; frequency of certain exposures in both groups is considered How do you calculate the odds ratio? - answer(A/B)/(C/D) expresses the odds of exposure among patients with a disease compared with odds of exposure among patients wo a disease What does an RR val of 1 mean? - answerRR = 1 means that there is NO relationship between exposure and disease What does RR <1 mean? - answerRR <1 suggests a negative relationship between exposure and disease (exposure prevents disease) What does RR >1 mean? - answerRR>1 sug