Table 2.

Operating characteristics of GAD-7 for different cut-off points.

Cut-off point	Sensitivity	Specificity	PPV	NPV	Cases
8	93.4	85.8	88.6	92.9	53.8
9	91.5	90.6	90.7	91.4	50.5
10	86.8	93.4	92.9	87.6	46.7
11	79.2	95.3	94.4	82.1	42.0
12	74.5	96.2	95.2	79.1	39.2
13	67.9	97.2	96.0	75.2	35.4
14	62.3	100.0	100.0	72.6	31.1

Note: PPV = Positive predictive value; NPV = Negative predictive value. All values expressed as %.