Epidemiology (Advanced Deeper Topics) MCQs

Community Medicine (PSM) · 13 free questions with answers & explanations.

1. In a cohort study, the Relative Risk (RR) of lung cancer in smokers versus non-smokers is 15. If the prevalence of smoking in the population is 30%, the Population Attributable Risk Percent (PAR%) is:
2. A researcher conducts a study where the outcome assessment is blinded but treatment allocation is not blinded. This study design is best described as:
3. A drug trial using intention-to-treat (ITT) analysis includes in the final analysis:
4. A retrospective cohort study differs from a prospective cohort study primarily in that:
5. The Bradford Hill criterion of 'dose-response relationship' (biological gradient) refers to:
6. In a double-blind RCT, 'allocation concealment' refers to:
7. A cross-over trial design where each participant receives both treatment A and treatment B in sequence is most appropriate for studying:
8. The formula for Relative Risk (RR) in a cohort study is:
9. In a study, when the sample size is increased from 100 to 400, the standard error of the mean (SEM) will:
10. In a clinical trial, the p-value of 0.03 with alpha set at 0.05 means:
11. The non-parametric equivalent of the independent samples t-test, used when data are not normally distributed, is:
12. A correlation coefficient (r) of -0.85 between physical activity and BMI indicates:
13. The number of degrees of freedom (df) for a chi-square test in a 3×2 contingency table is: