Table 2. Means, SDs and effect sizes (Cohen’s d) for measures of depression, anxiety, psychological flexibility and quality of life.

Mean (SD)				Effect size, d (95% CI)
Outcome measure	Pre-treatment	Post-treatment	Follow-up	Between-group, pre to post	Between-group, pre to follow-up	Within-group, pre to post	Within-group, pre to follow-up
BDI-II
Blended treatment	28.96 (8.07)	15.17 (11.51)	14.61 (12.86)	-0.13 (-2.37, 2.09)	-0.10 (-2.53, 2.33)	1.40 (-0.61, 3.41)	1.35 (-0.82, 3.52)
Full BA treatment	27.32 (7.89)	13.68 (10.68)	13.43 (11.27)			1.47 (-0.41, 3.35)	1.44 (-0.50, 3.39)
PHQ-9
Blended treatment	15.39 (4.73)	7.13 (5.78)	7.20 (6.13)	0.01 (-1.20, 1.23)	0.05 (-1.18, 1.27)	1.58 (0.51, 2.65)	1.51 (0.41, 2.62)
Full BA treatment	15.30 (4.49)	7.21 (6.27)	7.49 (6.06)			1.50 (0.41, 2.59)	1.48 (0.42, 2.55)
BAI
Blended treatment	15.74 (12.11)	8.11 (9.27)	12.57 (12.30)	0.36 (-1.48, 2.20)	0.03 (-2.30, 2.37)	0.72 (-1.46, 2.89)	0.26 (-2.20, 2.73)
Full BA treatment	17.47 (9.18)	11.34 (9.02)	12.96 (10.87)			0.68 (-1.14, 2.50)	0.45 (-1.56, 2.47)
AAQ-II
Blended treatment	30.41 (7.15)	25.78 (7.09)	24.30 (8.37)	-0.01 (-1.62, 1.60)	-0.07 (-1.83, 1.68)	0.66 (-0.78, 2.10)	0.79 (-0.78, 2.37)
Full BA treatment	30.64 (7.68)	25.72 (8.82)	23.66 (9.06)			0.60 (-1.05, 2.26)	0.84 (0.84, 2.52)
QOLI
Blended treatment	-0.68 (1.72)	0.81 (1.99)	0.82 (2.08)	0.01 (-0.36, 0.37)	0.03 (-0.35, 0.40)	0.80 (0.43, 1.18)	0.79 (0.41, 1.18)
Full BA treatment	-0.44 (1.44)	0.79 (1.65)	0.78 (1.67)			0.80 (0.49, 1.11)	0.79 (0.48, 1.10)

Abbreviations: BDI-II: Beck Depression Inventory-II; PHQ-9: 9-item Patient Health Questionnaire Depression Scale; BAI: Beck Anxiety Inventory; AAQ-II: Acceptance and Action Questionnaire; QOLI: Quality of Life Inventory.