Table 3. Means, SDs and effect sizes (Cohen’s d) for measures of emotional processing and mindfulness skills.

	Mean (SD)			Effect size Cohen’s d (95% CI)			Linear mixed models
Measure and group	Pre-treatment	Post-treatment	7-month follow-up	Between-group, post-treatment	Within-group pre-post-treatment	Within-group pre-7-month follow-up	Effect	p
EPS-25							Group	.50
Treatment group (n = 50)	5.00 (1.03)	2.86 (1.48)	2.84 (1.65)	0.82 (0.41–1.23)	1.67 (1.13–2.21)	1.51 (1.00–2.01)	Time	< .001
Control group (n = 50)	4.93 (1.01)	4.17 (1.73)			0.50 (0.22–0.77)		G × T	< .001
FFMQ							Group	.15
Treatment group (n = 50)	76.70 (10.9)	88.00 (12.0)	88.98 (13.3)	0.65 (0.25–1.05)	0.98 (0.65–1.31)	0.99 (0.59–1.39)	Time	< .001
Control group (n = 50)	77.18 (14.1)	78.44 (17.1)			0.08 (−0.11–0.27)		G × T	< .001

Notes.

The confidence intervals were calculated using the standard error and an alpha level of 0.05. A confidence interval that do not overlap zero indicates a significance of p < .05. p values are given for linear mixed models using data from pre-treatment and post-treatment and all individuals (N = 100). The p value associated with the main effect of group denotes significance of average difference between groups at the pre-treatment assessment. The p value associated with the effect of time denotes the significance of average change over all assessment periods across treatment. The p value associated with the effect of G × T (group × time) denotes significance of difference between the treatment group and the control group in change over all assessment periods. Effect sizes are calculated as standardized mean differences. EPS-25: Emotional Processing Scale; FFMQ: Five Facets of Mindfulness Questionnaire.