Online medical calculator to calculate negative predictive value (NPV) from the user inputs. NPV is the probability that subjects with a negative screening test truly don't have the disease. Negative predictive value tells us how many of test negatives are true negatives; and if this number is higher (should be close to 100), then it suggests that this new test is doing as good as ′gold standard.′
Formula:
where,
TN = Number of true negative
FN = Number of false negative
NPV = Negative predictive value
TN = Number of true negative
FN = Number of false negative
NPV = Negative predictive value