Table 1. Descriptive Statistics, Reliability Coefficients, and Sensitivity to Change Statistics for FFMQ-39 and FFMQ-15 Facets Pre- and Post-MBCT (N = 238).

Scale and subscale	Pre-MBCT			Post-MBCT			Sensitivity to change
	M	SD	α	M	SD	α	ta	d [95% CI]b
Note. For FFMQ-39 subscales, scores range from 8−40, except for nonreactivity to experience scores, which range from 7−35. For all FFMQ-15 subscales, scores range from 3−15. CI = confidence interval; FFMQ = Five Facet Mindfulness Questionnaire; MBCT = mindfulness-based cognitive therapy.
a Paired-samples t tests comparing pre-MBCT and post-MBCT scores on the FFMQ facets. b Cohen’s d effect sizes, with accompanying 95% CIs.
* p < .001.
FFMQ-39
Observing	25.00	5.78	.78	28.32	5.02	.82	−10.14*	−0.61 [−0.74, −0.48]
Describing	26.21	6.36	.88	27.79	6.11	.90	−5.28*	−0.25 [−0.35, −0.16]
Acting with Awareness	24.12	5.29	.84	25.87	4.93	.86	−5.40*	−0.34 [−0.47, −0.21]
Nonjudging of Inner Experience	24.72	6.12	.86	27.71	5.85	.88	−7.56*	−0.50 [−0.63, −0.36]
Nonreactivity to Inner Experience	20.10	4.94	.83	22.70	4.28	.85	−7.80*	−0.56 [−0.71, −0.41]
FFMQ-15
Observing	8.98	2.73	.64	10.37	2.26	.69	−8.78*	−0.55 [−0.68, −0.42]
Describing	9.84	2.74	.80	10.55	2.60	.83	−5.20*	−0.26 [−0.36, −0.16]
Acting with Awareness	9.10	2.25	.68	10.11	2.09	.70	−6.98*	−0.47 [−0.61, −0.33]
Nonjudging of Inner Experience	9.43	2.67	.76	10.71	2.44	.78	−7.31*	−0.50 [−0.64, −0.36]
Nonreactivity to Inner Experience	8.58	2.30	.66	9.68	2.10	.77	−6.47*	−0.50 [−0.65, −0.34]