Gold standard | |||
GS+ | GS− | ||
Test | T+ | TP | FP |
T− | FN | TN | |
Sensitivity = TP/(TP + FN) | |||
Specificity = TN/(FP + TN) | |||
Positive predictive value = TP/(TP + FP) | |||
Negative predictive value = TN/(FN + TN) | |||
LR+ = sensitivity/(1 – specificity) = (a/(a + c))/(b/(b + d)) | |||
LR− = (1 – sensitivity) / specificity = (c/(a + c))/(d/(b + d)) | |||
iNLR = specificity/(1 – sensitivity) | |||
T− = Test negative | |||
T+ = Test positive | |||
FP = False positive | |||
TP = True positive | |||
FN = False negative | |||
TN = True negative | |||
GS− = Gold standard negative | |||
GS+ = Gold standard positive | |||
LR+ = Likelihood ration positive | |||
LR− = Likelihood ration negative |