Test your knowledge of NNT, NNH, sensitivity, specificity, study design, and statistical concepts. Full explanations provided for every answer.
10 questions · ~8 minutes · Immediate feedback with explanations
NNT = 1 / ARR. Lower NNT = more effective treatment. NNT of 1 means every patient benefits.
NNH = 1 / ARI. Higher NNH = safer drug. Compare NNT vs NNH to evaluate risk-benefit.
TP / (TP + FN). A highly sensitive test rarely misses disease. Used to RULE OUT (SnNout).
TN / (TN + FP). A highly specific test rarely has false positives. Used to RULE IN (SpPin).
Risk in exposed / Risk in unexposed. RR = 1 means no association. Used in cohort studies.
Odds of exposure in cases / odds in controls. Used in case-control studies. OR ≈ RR when disease is rare.