Table 2 Means and measurements Pre (T0) Post (T1) FU (T2) Group x time Between-group effect size d [95% CI] Group M (SE) M (SE) M (SE) F T1 T2 Primary outcome Mental Health Perceived stress (PSS) MBSR 1.74 (0.06) 1.49 (0.06) 1.41 (0.06) 10.81** -0.84 [-1.19; -0.49] -0.69 [-1.03; -0.34] WL 1.71 (0.05) 1.87 (0.05) 1.72 (0.05) Secondary outcomes Mental Health Well-being (MHC-SF) MBSR 2.93 (0.06) 3.33 (0.06) 3.39 (0.06) 11.09** 0.54 [0.20; 0.88] 0.72 [0.37; 1.06] WL 2.94 (0.06) 3.06 (0.06) 3.02 (0.06) Proximal outcomes Mindfulness skills (FFMQ-SF) MBSR 3.18 (0.03) 3.41 (0.03) 3.48 (0.03) 46.16*** 0.91 [0.56; 1.26] 1.37 [1.00; 1.74] WL 3.19 (0.03) 3.21 (0.03) 3.18 (0.03) Emotion regulation (BRIEF-A) MBSR 0.68 (0.03) 0.48 (0.03) 0.47 (0.03) 16.55** -0.74 [-1.09; -0.39] -0.80 [-1.15; -0.46] WL 0.66 (0.03) 0.68 (0.03) 0.69 (0.03) Self-compassion (SCS-SF) MBSR 2.89 (0.08) 3.62 (0.08) 3.82 (0.08) 40.19*** 0.88 [0.53; 1.23] 1.26 [0.90; 1.63] WL 2.95 (0.07) 3.07 (0.07) 3.02 (0.07) Distal outcomes Teacher’s self-efficacy (TSES-SF) MBSR 5.21 (0.07) 5.75 (0.07) 5.97 (0.07) 20.07*** 0.78 [0.44; 1.13] 0.86 [0.51; 1.21] WL 5.26 (0.07) 5.32 (0.07) 5.49 (0.07) Pupil-teacher relationship MBSR 2.37 (0.03) 2.52 (0.03) 2.58 (0.03) 2.11 0.30 [-0.03; 0.64] 0.29 [-0.05; 0.63] WL 2.38 (0.03) 2.44 (0.03) 2.50 (0.03) Classroom climate quality MBSR 2.45 (0.02) 2.53 (0.02) 2.59 (0.02) 10.08** 0.49 [0.15; 0.83] 0.62 [0.28; 0.96] WL 2.45 (0.02) 2.44 (0.02) 2.48 (0.02)
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