Table 2.

Predicting from dichotomous measures to sample status in the combined community and clinic sample (N = 338)

		Base rate	Sensitivity	Specificity	PPV	NPV	Efficiency	Kappa
6	High P-SDQ score	0.17	0.51	0.95	0.77	0.85	0.84	0.52
7	High Y-SDQ score	0.05	0.16	0.98	0.78	0.78	0.78	0.20
8	High P-SDQ symptom + impact	0.24	0.71	0.92	0.76	0.90	0.87	0.65
9	High Y-SDQ symptom + impact	0.06	0.20	0.98	0.81	0.78	0.78	0.24
10	High PY-SDQ symptom + impact	0.23	0.70	0.93	0.78	0.90	0.87	0.65
11	High P-DAWBA band	0.14	0.42	0.95	0.73	0.83	0.81	0.43
12	High Y-DAWBA band	0.09	0.29	0.97	0.78	0.80	0.80	0.33
13	High PY-DAWBA band	0.18	0.50	0.93	0.72	0.85	0.82	0.48

SDQ Strengths and Difficulties Questionnaire, DAWBA Development and Well-Being Assessment, all kappas significant at p < 0.001; PPV positive predicted value, NPV negative predicted value