Table 2.

Means (and SD) of Type D dimensions and standardized state negative affect scores at pre- and post-intervention for the mindfulness and control groups

	Mindfulness group (N = 72)		Waitlist control group (N = 74)		F/t values	Effect size partial η2
	Pre-treatment	Post-treatment	Pre-treatment	Post-treatment
NA	16.15 (5.22)	12.99 (5.32)	17.16 (5.09)	16.39 (5.21)	20.83***/4.37***	0.14/0.12
SI	12.49 (6.53)	10.87 (6.45)	11.53 (6.45)	11.17 (6.28)	6.10*/2.54*	0.04/0.04
State negative affect	−0.11 (0.99)	−0.25 (0.97)	0.11 (1.00)	0.28 (0.98)	10.64**/3.13**	0.07/0.06

Data shown are original (non-imputed) data, test statistics are shown for the Time by Group interaction effect: for both non-imputed (F test) and imputed data (pooled t test), respectively; NA negative affectivity; SI social inhibition; for state negative affect standardized scores are shown; * p < .05; ** p < .01; *** p < .001