Table 2.

Outcome measures at each assessment time for per-protocol sample (used program at least once a week; n=225).

Measurements	Intervention group (n=90)				Wait-list control group (n=135)
Questionnaires	Pre, mean (SD)	Post, mean (SD)	Cohen d (95% CI)	P value	Pre, mean (SD)	Post, mean (SD)	Cohen d (95% CI)	P value
PHQ-9a	11.27 (5.03)	9.30 (5.22)b	−0.38 (−0.8 to 0.03)	<.001	11.10 (4.42)	10.17 (4.32)c	−0.21 (−0.55 to 0.13)	.007
RSEb	25.56 (6.41)	28.00 (6.44)b	0.38 (−0.04 to 0.80)	<.001	26.59 (6.02)	27.57 (6.43)b	0.16 (−0.18 to 0.50)	.001
WHOQOL-BREFc	3.74 (0.80)	3.86 (0.82)	0.15 (−0.27 to 0.65)	.12	3.67 (0.76)	3.76 (0.72)	0.12 (−0.22 to 0.46)	.19

^aPHQ-9: Patient Health Questionnaire-9.

^bRSE: Rosenberg Self-esteem Scale.

^cWHOQOL-BREF: World Health Organization Quality of Life-abbreviated version.