Table 3.

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

		Base rate	Sensitivity	Specificity	PPV	NPV	Efficiency	Kappa
14	High P-SDQ score	0.17	0.51	0.94	0.74	0.85	0.83	0.50
15	High Y-SDQ score	0.05	0.18	0.99	0.83	0.79	0.79	0.23
16	High P-SDQ symptom + impact	0.24	0.69	0.91	0.71	0.90	0.86	0.60
17	High Y-SDQ symptom + impact	0.06	0.20	0.98	0.81	0.79	0.79	0.25
18	High PY-SDQ symptom + impact	0.23	0.72	0.93	0.78	0.91	0.88	0.67
19	High P-DAWBA band	0.14	0.52	0.98	0.88	0.86	0.86	0.57
20	High Y-DAWBA band	0.09	0.36	0.99	0.94	0.83	0.84	0.45
21	High PY-DAWBA band	0.18	0.64	0.97	0.88	0.89	0.89	0.67

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