Enter PREVALENCE, SENSITIVITY, and SPECIFICITY:

Or enter TP, FN, TN, and FP:

Sensitivity = TP / (TP+FN)

Specificity = TN / (FP+TN)

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

Predictive value positive = TP / (TP+FP)

Predictive value negative = TN / (FN+TN)

Positive Likelihood Ratio = SENS / (1-SPEC)

Negative Likelihood Ratio = (1-SENS) / SPEC

Pre-test Probability = Prevalence

Pre-test Odds = Pre-test Prob / (1 - Pre-test Prob)

Post-test Odds = Pre-test Odds x Likelihood Ratio

Post-test Probability = Post-test Odds / (1 + Post-test Odds)