Table 3.

Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for different cut-off scores^a of the K10, K6 and GHQ-12 for any present state DSM-IV disorder (n=293)

Score K10	Sensitivity	Specificity	PPV	NPV
21	0.816	0.594	0.41	0.90
22	0.776	0.664	0.45	0.89
23	0.750	0.733	0.50	0.89
24	0.724	0.779	0.53	0.89
25	0.671	0.816	0.56	0.88
26	0.645	0.839	0.58	0.87
27	0.526	0.866	0.58	0.84
Score K6
11	0.855	0.516	0.38	0.91
12	0.829	0.618	0.43	0.91
13	0.750	0.700	0.47	0.89
14	0.684	0.770	0.51	0.87
15	0.579	0.843	0.56	0.85
16	0.526	0.876	0.60	0.84
17	0.447	0.903	0.62	0.82
Score GHQ-12
17	0.566	0.705	0.40	0.83
18	0.539	0.728	0.41	0.82
19	0.526	0.788	0.46	0.83
20	0.487	0.829	0.50	0.82
21	0.408	0.862	0.51	0.81
22	0.382	0.889	0.55	0.80
23	0.329	0.912	0.57	0.80

^a Optimal cut-off scores in bold letter type.