How to Calculate Sensitivity, Specificity, Positive Predictive Value, and Negative Predictive Value

To calculate the negative predictive value (NPV), divide TN by (TN+FN). In the case above, that would be 810/(810+5)= 99.4%. The negative predictive value tells us how likely someone is to not have the characteristic if the test is negative. Among all peo

www.wikihow.com