Sensitivity and Specificity Calculator

Sensitivity and Specificity Formula

Sensitivity Formula:

Sensitivity = TP / (TP + FN)

Specificity Formula:

Specificity = TN / (FP + TN)

Positive likelihood ratio Formula:

Positive likelihood ratio = Sensitivity / (1 - Specificity)

Negative likelihood ratio Formula:

Negative likelihood ratio = (1 - Sensitivity) / Specificity

PPV Formula:

PPV = (Sensitivity × Prevalence)/[(Sensitivity × Prevalence) + ((1 - Specificity) × (1 - Prevalence))]

NPV Formula:

NPV =(Specificity × (1 - Prevalence))/[((1 - Sensitivity) × Prevalence) + (Specificity × (1 - Prevalence))]

Accuracy Formula:

Accuracy = (TP + TN) / (TP + TN + FP + FN)