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epidemiology biostatistics calculations diagnosis sensitivity equations formulas mnemonic betadglucan calculation falsepositives fungal galactomannan laboratory matrix positivepredictivevalue table usmle
Important Biostatistics and Epidemiology Equations Sensitivity = TP / (TP + FN) = true positives / disease
disease present Specificity ... Sensitivity) / Specificity ... Sensitivity vs Specificity ... Biostatistics #statistics ... #PPV #NPV
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
Specificity is the ... PositivePredictiveValue #NegativePredictiveValue ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
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 Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
Negatives #NegativePredictiveValue ... #NPV #Biostatistics ... #statistics #Epidemiology
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives 1,3-Beta-D-Glucan • Cell wall component of many fungi
Galactomannan Testing ... Sensitivity Specificity ... 96% • Higher specificity ... dx of IA PPV ... NPV >90% (In most
USMLE Epidemiology and Biostatistics Summary Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
PPV: proportion ... prevalence is low, then PPV ... NPV: proportion ... -> higher PPV ... sensitivity -> higher NPV
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