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Determining Diagnostic Test Quality by Mind Map: Determining Diagnostic Test
Quality
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Determining Diagnostic Test Quality

Sensitivity

It is the true positive rate

Sensitivity of a test is the percentage of all patients with disease present who have a positive test

sensitivity= TP/ (TP+FN)

Specificity

It is the the true negative rate

Specificity of a test is the percentage of all patients without disease who have a negative test.

specificity=TN/(TN+FP)

Positive predictive value

the percent of all positive tests that are true positives

PPV=TP/(TP+TN)

Negative predictive value

the percent of all negative tests that are true negative

NPV=TN/(TN+FN)

The diagnostic value of a procedure is defined by its sensitivity, specificity, predictive value and efficiency.

Useful Links

Clinical tests sensitivity and specificity

Sensitivity, Specificity and Predictive Values

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