Table 4.

Effects of Master Your Mood (MYM) course: comparison of responding participants only, no imputation.

Instrument	MYM group (n = 96)			Wait-listed controls (n = 98)			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 (8.0)	19.1 (10.7)	1.60	31.6 (7.7)	26.7 (9.4)	0.60	0.99	5.69	179.1	<.001
Anxiety (HADS)d	10.9 (3.5)	7.8 (4.2)	0.88	11.7 (3.2)	10.2 (3.5)	0.39	0.49	3.10	192	.002
Masterye	12.9 (3.3)	16.1 (4.3)	0.93	12.9 (3.3)	14.6 (3.8)	0.47	0.46	2.82	184.5	.005

^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].