PHC 6001 Final Exam Questions and Answers 100% Solved

PHC 6001 Final Exam Questions and
Answers 100% Solved

individual matching individually match each control to a case




issues with case-control studies recall bias - have to ask cases and controls to accurately

remember potential exposures




analysis of case-control studies odds ratio - can't use relative risk because there is no

temporality




odds ratio of the probability of the event occurring to that of it not occuring




OR equal to 1 there is no evidence of an association between exposure and health

outcome




OR greater than 1 there is a positive association between exposure and health outcome

(may be causal)

, OR less than 1 there is a negative association between exposure and health outcome (the

exposure may be protective)




3 things that determine validity bias, confounding, random error




internal validity was the study done without bias, confounding, or random error




external validity is the study generalizable to all populations




selection bias study subjects don't represent the target population - most likely in case-

control or retrospective cohort




selection bias in case control occurs when researchers don't use same criteria for selection

controls as for selecting cases




self selection bias can occur if you have a case-control study that doesn't have high

participation rates if the decision to participate is related to the exposure and outcome