USMLE Step 1 Biostatistics/Epidemiology Questions and Answers 100% Correct
Sensitivity TP / (TP + FN) Specificity TN / (TN + TP) Positive Predictive Value TP / (TP + FP) Negative Predictive Value TN / (FN + TN) Incidence Rate # of new cases in a certain time period / population that is at risk during that time period This looks at new incidences occurring during a time period Prevalence # of existing cases / population at risk Looks at ALL current cases Odds Ratio (a/c) / (b/d) OR ad / bc Relative Risk [a / (a + b)] / [c / (c + d)]
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usmle step 1 biostatisticsepidemiology questions
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