Table 2

Two-by-two table for a target population



Gold Standard






S+
S-
Total

Clinical Test
T+
A = True Positive
B = False Positive
A+B

T-
C = False Negative
D = True Negative
C+D

2.1 PPV = P(S+|T+) = Math

2.2 NPV = P(S-|T-) = Math

2.3 PPR = Math[29]

2.4 NPR = Math[29]

Error terms for the target population:

αp = False Positive Rate = FPR = Math

βp = False Negative Rate = FNR = Math

Linn and Grunau Epidemiologic Perspectives & Innovations 2006 3:11   doi:10.1186/1742-5573-3-11

Open Data