Online medical calculator to calculate positive predictive value (precision) from the user inputs. PPV is the probability that subjects with a positive screening test truly have the disease. Positive predictive value tells us about this – how many of test positives are true positives; and if this number is higher (as close to 100 as possible), then it suggests that this new test is doing as good as ′gold standard.′. It can be calculated using the equation,
Formula:
where,
TP = number of true positive,
FP = number of false positive,
PPV = positive predictive value
TP = number of true positive,
FP = number of false positive,
PPV = positive predictive value