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biostatistics calculations diagnosis equations mnemonic negativepredictivevalue positivepredictivevalue sensitivity specificity calculation matrix table usmle
Important Biostatistics and Epidemiology Equations Sensitivity = TP / (TP + FN) = true positives / disease
Biostatistics and Epidemiology ... Biostatistics #statistics ... #Epidemiology # ... #specificity #PPV ... #NPV
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
in the screened population ... #Epidemiology #Sensitivity ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
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 Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease Positive
PositivePredictiveValue #PPV ... Biostatistics #statistics ... #Epidemiology #
Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
NegativePredictiveValue #NPV ... Biostatistics #statistics ... #Epidemiology #
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 ... specificity -> higher PPV ... sensitivity -> higher NPV
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