Table 1

Participant demographic characteristics and self-report means, standard deviations, and ranges

Characteristic	Group; mean ± SD (range)^*		Baseline group differences

	MBSR	SE
No. of particpants (M/F)	39 (26/13)	39 (23/16)	χ²₇₆ = 0.494; p = 0.482; ϕ = 0.080
Age, yr	31.15 ± 13.57 (18–67) n = 39	33.89 ± 13.34 (18–72) n = 38	t₇₅ = −0.862; p = 0.392; d = 0.204
IQ^†	104.76 ± 16.75 (70–131) n = 36	108.02 ± 17.38 (70–142) n = 35	t₆₉ = 0.817; p = 0.419; d = 0.015
ADOS-2	11.50 ± 3.85 (6–23) n = 38	10.95 ± 3.64 (7–19) n = 37	t₇₃ = −0.641; p = 0.524; d = 0.147
Classes attended	6.4 ± 2.3 (0–8) n = 39	6.8 ± 2.0 (0–8) n = 39	t₇₆ = 0.785; p = 0.435; d = 0.186

ADOS-2 = Autism Diagnostic Observation Schedule-2; F = female; M = male; MBSR = mindfulness-based stress reduction; SD = standard deviation; SE = social support/education.
↵* Unless indicated otherwise.
↵† Kaufman Brief Intelligence Test-2 Composite.