Table 1.

Some characteristics and effects sizes for individual studies included in the meta-analysis.

Study	N	Mean age	% Gender	Treatment	Mode Intervention	Duration treatment	Quality	G´s Hedges
Jain et al. (2007)a	27	25.00	17.60	Mindfulness	Group	4	4.50	0.468
Jain et al. (2007)b	24	25.00	17.60	Relaxation	Group	4	4.50	0.302
Jain et al. (2007)c	30	25.00	17.60	Control			4.50	-0.365
Hanstede et al. (2008))a	8	25.00	29.40	Mindfulness	Group	8	3.50	1.616
Hanstede et al. (2008))b	9	25.00	29.40	Control			3.50	0.081
Rupp et al. (2019)a	21	30.81	28.57	Mindfulness	Group	2	5,45	1.260
Rupp et al. (2019)b	22	31.23	54.54	Cognitive Restructuring	Group	2	5.50	2.016
Rupp et al. (2019)c	21	30.43	42.86	Control			4.46	0.087
Didonna et al., 2019	35	37.20	57.00	Mindfulness	Group	11	3.50	0.488
Cludius et al. (2015)a	49	39.88	38.77	Mindfulness	Individual	6	2.54	0.007
Cludius et al. (2015)b	38	41.37	26.31	Relajación	Individual	6	2.61	-0.032
Külz et al. (2019)-20)a	61	37.61	34.40	Mindfulness	Group	8	3.82	0.412
Külz et al. (2019)-20)b	64	39.59	42.20	Control			3.83	0.263
Key et al. (2017)a	18	40.53	50.00	Mindfulness	Group	8	2.73	0.335
Key et al. (2017)b	18	46.06	55.60	Control			3.34	-0.193
Selchen et al. (2018)a	19	40.68	36.80	Mindfulness	Group	8	4.00	1.111
Selchen et al. (2018)b	18	43.61	44.40	Mindfulness	Group	8	4.00	1.246
Strauss et al. (2018)a	19	33.00	21.00	Mindfulness+ CBT	Group	10	4.64	0.970
Strauss et al. (2018)b	18	27.00	50.00	Exposición	Group	10	4.67	1.092
Madani et al. (2013)a	15		0.00	Mindfulness	Group	4	2.80	0.994
Madani et al. (2013)b	15		0.00	Control			2.80	-0.221
Hawley et al. (2020)	36	26.00		Mindfulness	Individual	8	5.45	0.543

N: sample size in posttest for each group, Treatment duration (number of), G´s Hedges: effect size for obsessive-compulsive symptoms pre-postest outcome.