Sensitivity and Specificity of diagnostic tests
Disease
Positive
Negative
Test
Positive
True Positive (TP)
False Positive (FP)
TP + FP
95
Negative
False Negative (FN)
True Negative (TN)
FN + TN
27
TP + FN
103
FP + TN
19
122
Sensitivity:
0.854368932039
Specificity:
0.631578947368
Positive Predictive Value (PPV):
0.926315789474
Negative Predictive Value (NPV):
0.444444444444
Likelihood Ratio Positive (LR+):
2.31900138696
Likelihood Ratio Negative (LR-):
0.230582524272
Source code is available at
biophp.org