Table 3. Sensitivity and specificity of PHQ-9 and PHQ-2.

Cut-off points	Sensitivity	Specificity
PHQ-9≧6	0.93	0.56
≧7	0.90	0.63
≧8	0.88	0.69
≧9	0.81	0.74
≧10	0.79	0.77
≧11	0.76	0.81
≧12	0.71	0.84
≧13	0.71	0.86
≧14	0.64	0.89
≧15	0.60	0.92
PHQ-2≧1	0.95	0.45
≧2	0.86	0.65
≧3	0.76	0.81
≧4	0.55	0.88
≧5	0.45	0.95
≧6	0.19	0.99