Table 2. Selected Characteristics of PHQ-9, GAD-7, and PHQ-ADS in Three Trials.

Variable	SCOPE (n = 250)	ESCAPE (n = 241)	INCPAD (n = 405)
Scale scores, mean (SD)
PHQ-9,	9.1 (6.3)	11.2 (5.9)	13.0 (6.7)
GAD-7	5.9 (5.6)	8.8 (5.3)	7.9 (5.8)
PHQ-ADS	14.9 (11.2)	20.0 (10.4)	20.8 (11.0)
Cronbach's alpha
PHQ-9	0.842	0.846	0.816
GAD-7	0.882	0.853	0.855
PHQ-ADS	0.917	0.908	0.878
Standard error of measurement
PHQ-9	2.51	2.29	2.91
GAD-7	1.97	2.04	2.94
PHQ-ADS	3.18	3.13	3.81
PHQ-ADS Categories, n %
Minimal (0-9)	96 (38.4)	53 (22.0)	65 (16.1)
Mild (10-19)	78 (31.2)	66 (27.4)	122 (30.1)
Moderate (20-29)	42 (16.8)	68 (28.2)	122 (30.1)
Severe (30-39)	34 (13.6)	54 (22.4)	96 (23.7)