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epidemiology biostatistics calculations equations mnemonic sensitivity specificity npv ppv antibody calculation classification detection formulas hivaids infectiousdiseases likelihoodratios matrix relationship screening
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
the screening test ... will correctly diagnose ... #Specificity #PositivePredictiveValue ... #NegativePredictiveValue ... NPV #Formulas #Statistics
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 Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease Positive
with a positive test ... Positives #PositivePredictiveValue ... Biostatistics #statistics ... #calculations #diagnosis
Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
with a negative test ... Negatives #NegativePredictiveValue ... Biostatistics #statistics ... #calculations #diagnosis
The following graph was prepared based on the latest information on Testing for the Diagnosis of
The following graph ... Testing for the Diagnosis ... bother doing any tests ... There are NO tests ... #Diagnosis #InfectiousDiseases
It's eye-opening to realize how many tests with reasonable-appearing sensitivity or specificity will end up being
realize how many tests ... below classifies tests ... Most tests will ... #Diagnosis #Statistics ... #Specificity #Graph
This requires defining some general cutoff values for likelihood ratios. These are admittedly arbitrary, but
likelihood ratios: #Diagnosis ... #Statistics #Sensitivity ... #Relationship #Graph
Specificity Calculation - Probability that a test correctly identifies those without the disease (true negative rate) Specificity
Probability that a test ... Biostatistics #statistics ... #calculations #diagnosis
Sensitivity Calculation - Probability that a test correctly identifies those with the disease (true positive rate) Sensitivity
Probability that a test ... Biostatistics #statistics ... #calculations #diagnosis
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