Table 3.

Effects of Master Your Mood (MYM) course: intention-to-treat analysis of full sample, expectation-maximization imputation.

Instrument	MYM group (n = 121)			Wait-listed controls (n = 123)			Between-group outcomes
	Baseline (t 0) mean (SD)	12 weeks (t 1) mean (SD)	d a	Baseline (t 0) mean (SD)	12 weeks (t 1) mean (SD)	d	Dif d b	t	df	P value
Depression (CES-D)c	32.5 (8.4)	19.3 (9.7)	1.57	32.2 (8.2)	27.0 (8.6)	0.63	0.94	6.62	179.1	<.001
Anxiety (HADS)d	11.2 (3.6)	8.0 (3.9)	0.89	11.8 (3.7)	10.4 (3.3)	0.39	0.49	3.80	215.9	<.001
Masterye	12.8 (3.4)	15.9 (4.1)	0.91	12.8 (3.6)	14.5 (3.5)	0.47	0.44	3.36	226.8	.001

^a Individual standardized effect size (d = t 0 – t 1 /SDt0), with positive effect sizes indicating improvement.

^b Effect size differences between MYM group and wait-listed control group.

^c Dutch version of the Center for Epidemiologic Studies Depression Scale [43].

^d Dutch version of the Hospital Anxiety and Depression Scale [47].

^e 5-item Mastery Scale [48].