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diagnosis epidemiology sensitivity specificity biostatistics calculations equations mnemonic npv positivepredictivevalue calculation classification formulas likelihoodratios matrix relationship strength table test
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
PositivePredictiveValue #NegativePredictiveValue ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
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 Important Biostatistics and Epidemiology Equations Sensitivity = TP / (TP + FN) = true positives / disease
Biostatistics #statistics ... #specificity #PPV ... #NPV
Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
Negatives #NegativePredictiveValue ... #NPV #Biostatistics ... #statistics #Epidemiology
Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease Positive
PositivePredictiveValue #PPV ... Biostatistics #statistics
This requires defining some general cutoff values for likelihood ratios. These are admittedly arbitrary, but
#Diagnosis #Statistics ... #Relationship #Graph
It's eye-opening to realize how many tests with reasonable-appearing sensitivity or specificity will end up being
#Diagnosis #Statistics ... #Specificity #Graph
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