Table 4.

Results of the ITT repeated measures ANOVAs.

	Pre-intervention – post-intervention (T1 – T2)									Pre-intervention – follow-up I (T1 – T3)
	Group effect			Time effect			Interaction effect			Group effect			Time effect			Interaction effect
Outcome	F	p	ηp2	F	p	ηp2	F	p	ηp2	F	p	ηp2	F	p	ηp2	F	p	ηp2
Mindfulness
Observing	0.73	0.535	0.01	5.47	0.020	0.03	1.35	0.261	0.02	0.17	0.915	0.00	7.56	0.007	0.04	0.52	0.670	0.01
Describing	1.31	0.273	0.02	21.94	<0.001	0.11	0.29	0.836	0.01	1.79	0.151	0.03	18.13	<0.001	0.10	0.12	0.951	0.00
Acting awareness	0.58	0.628	0.01	4.17	0.043	0.02	2.12	0.099	0.04	1.99	0.117	0.03	18.95	<0.001	0.10	0.15	0.932	0.00
Non-judging	0.45	0.717	0.01	28.20	<0.001	0.14	1.05	0.373	0.02	0.24	0.869	0.00	51.24	<0.001	0.23	1.53	0.210	0.03
Non-reactivity	0.85	0.466	0.02	58.58	<0.001	0.25	1.01	0.390	0.02	0.53	0.666	0.01	54.33	<0.001	0.24	1.68	0.174	0.03
Mindfulness characteristics
Body awareness	0.59	0.621	0.01	37.35	<0.001	0.18	0.44	0.726	0.01	0.77	0.512	0.01	16.93	<0.001	0.09	1.40	0.244	0.02
Non-attachment	0.77	0.511	0.01	3.34	0.070	0.02	0.49	0.689	0.01	0.48	0.694	0.01	10.44	0.001	0.06	0.62	0.605	0.01
Emotional regulation
Reappraisal	0.32	0.812	0.01	3.27	0.072	0.02	0.67	0.575	0.01	0.45	0.715	0.01	16.07	<0.001	0.09	1.58	0.196	0.03
Acceptance	0.29	0.833	0.01	8.95	0.003	0.05	0.15	0.928	0.00	0.12	0.947	0.00	11.83	<0.001	0.06	0.51	0.677	0.01
Rumination	0.63	0.594	0.01	37.59	<0.001	0.18	0.38	0.769	0.01	0.27	0.845	0.01	45.68	<0.001	0.21	0.52	0.669	0.01
Mental health
Depression	0.26	0.857	0.00	3.20	0.075	0.02	1.50	0.215	0.03	0.04	0.988	0.00	7.01	0.009	0.04	2.59	0.054	0.04
Anxiety	0.30	0.824	0.01	7.74	0.006	0.04	1.38	0.250	0.02	0.31	0.815	0.01	30.19	<0.001	0.15	1.14	0.335	0.02
Stress	0.18	0.911	0.00	17.35	<0.001	0.09	2.37	0.072	0.04	0.86	0.463	0.02	33.95	<0.001	0.16	0.40	0.755	0.01
Attentional abilities
Concentration	0.16	0.923	0.00	211.35	<0.001	0.55	3.16	0.026	0.05	0.63	0.599	0.01	93.86	<0.001	0.35	0.75	0.525	0.01
Working accuracy	0.24	0.866	0.00	78.10	<0.001	0.31	0.47	0.703	0.01	0.49	0.690	0.01	23.01	<0.001	0.12	0.38	0.766	0.01
Working speed	0.29	0.835	0.01	92.39	<0.001	0.35	0.58	0.627	0.01	0.33	0.802	0.01	44.27	<0.001	0.20	0.45	0.719	0.01

	Pre-intervention – follow-up II (T1 – T4)
	Group effect			Time effect			Interaction effect
Outcome	F	p	ηp2	F	p	ηp2	F	p	ηp2
Mindfulness
Observing	0.08	0.969	00	4.29	0.040	0.02	0.22	0.883	0.00
Describing	2.51	0.061	0.04	49.27	<0.001	0.22	0.02	0.997	0.00
Acting awareness	0.78	0.504	0.01	4.62	0.033	0.03	1.37	0.253	0.02
Non-judging	0.42	0.737	0.01	13.23	<0.001	0.07	0.32	0.810	0.01
Non-reactivity	0.86	0.465	0.02	47.39	<0.001	0.22	2.24	0.085	0.04
Mindfulness characteristics
Body awareness	0.34	0.796	0.01	51.40	<0.001	0.23	1.65	0.180	0.03
Non-attachment	0.58	0.630	0.01	1.82	0.180	0.01	0.37	0.774	0.01
Emotional regulation
Reappraisal	0.28	0.843	0.01	15.93	<0.001	0.08	0.75	0.522	0.01
Acceptance	0.76	0.517	0.01	9.26	0.003	0.05	0.29	0.837	0.01
Rumination	0.36	0.785	0.01	19.25	<0.001	0.10	0.19	0.900	0.00
Mental health
Depression	1.09	0.356	0.02	0.21	0.648	0.00	1.65	0.181	0.03
Anxiety	0.94	0.422	0.02	3.30	0.071	0.02	0.89	0.447	0.02
Stress	0.58	0.626	0.01	12.67	<0.001	0.07	1.01	0.391	0.02
Attentional abilities
Concentration	–	–	–	–	–	–	–	–	–
Working accuracy	–	–	–	–	–	–	–	–	–
Working speed	–	–	–	–	–	–	–	–	–

Bold values represent the statistically significant results.