Table 3.
Mixed Effects Intention-to-Treat Analysis (N = 136)
| Outcome | Arm | Baseline mean score (SD) | 8-week vs. baseline | 24-week vs. baseline | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Week 8 mean score (SD) | d (within-group) | Difference-in-differences MTPC vs. LDC | Week 24 mean score (SD) | d (within-group) | Difference-in-differences MTPC vs. LDC | |||||
| Β (SE) | d | Β (SE) | d | |||||||
| PROMIS-Anx | MTPC | 63.9 (6.9) | 58.5 (6.6) | − 0.80 (p < 0.001*) | − 2.44 (1.58) | − 0.36 | 58.1 (6.4) | − 0.87 (p < 0.001*) | − 2.02 (1.63) | − 0.30 |
| LDC | 61.9 (6.6) | 58.9 (6.9) | − 0.45 (p = 0.02*) | p = 0.12 | 58.0 (6.7) | − 0.59 (p = 0.004*) | p = 0.22 | |||
| PROMIS-Dep | MTPC | 59.2 (8.6) | 53.9 (7.9) | − 0.59 (p < 0.001*) | − 2.94 (1.68) | − 0.34 | 54.4 (7.3) | − 0.59 (p < 0.001*) | 0.20 (1.4) | 0.02 |
| LDC | 58.0 (8.6) | 55.6 (8.0) | − 0.29 (p = 0.08) | p = 0.08 | 52.9 (7.8) | − 0.62 (p < 0.001*) | p = 0.91 | |||
| PSS | MTPC | 25.0 (6.7) | 19.9 (6.3) | − 0.77 (p < 0.001*) | − 1.69 (1.28) | − 0.25 | 19.7 (6.0) | − 0.81 (p < 0.001*) | − 1.15 (1.32) | − 0.17 |
| LDC | 24.3 (6.6) | 20.9 (6.3) | − 0.53 (p = 0.001*) | p = 0.19 | 20.2 (6.1) | − 0.64 (p < 0.001*) | p = 0.39 | |||
| SECD | MTPC | 6.1 (1.9) | 6.7 (1.6) | 0.30 (p = 0.001*) | 0.34 (0.34) | 0.15 | 6.7 (1.5) | 0.30 (p = 0.002*) | 0.40 (0.35) | 0.21 |
| LDC | 6.2 (2.0) | 6.5 (1.7) | 0.16 (p = 0.32) | p = 0.31 | 6.4 (1.7) | 0.11 (p = 0.39) | p = 0.25 | |||
| FFMQ | MTPC | 115.8 (18.2) | 132.0 (16.9) | 0.92 (p < 0.001*) | 12.46 (3.49) | 0.57 | 135.2 (16.0) | 1.11 (p < 0.001*) | 8.95 (3.53) | 0.41 |
| LDC | 115.6 (24.5) | 119.4 (26.4) | 0.15 (p = 0.19) | p < 0.001* | 126.0 (25.6) | 0.42 (p < 0.001*) | p = 0.01* | |||
| SCS-SF | MTPC | 2.6 (0.67) | 3.1 (0.65) | 0.85 (p < 0.001*) | 0.29 (0.13) | 0.41 | 3.2 (0.62) | 0.98 (p < 0.001*) | 0.25 (0.13) | 0.36 |
| LDC | 2.6 (0.73) | 2.8 (0.69) | 0.52 (p = 0.01^) | p = 0.03* | 3.0 (0.67) | 0.52 (p < 0.001*) | p = 0.06 | |||
| PCQ | MTPC | 23.5 (4.4) | 25.3 (4.2) | 0.41 (p = 0.001*) | 1.04 (0.92) | 0.22 | 24.3 (4.0) | 0.19 (p = 0.14) | − 0.76 (0.95) | − 0.19 |
| LDC | 23.0 (4.4) | 23.8 (4.3) | 0.19 (p = 0.29) | p = 0.26 | 24.6 (4.2) | 0.38 (p = 0.38) | p = 0.42 | |||
| DERS | MTPC | 76.1 (23.0) | 60.2 (21.8) | − 0.71 (p < 0.001*) | − 13.42 (4.28) | − 0.58 | 58.5 (20.4) | − 0.80 (p < 0.001*) | − 7.73 (4.45) | − 0.34 |
| LDC | 72.2 (23.2) | 68.8 (21.8) | − 0.15 (p = 0.48) | p < 0.00* | 61.4 (21.7) | − 0.48 (p = 0.006*) | p = 0.08 | |||
| MAIA | MTPC | 2.4 (0.73) | 3.1 (0.64) | 1.00 (p < 0.001*) | 0.55 (0.13) | 0.75 | 3.1 (0.63) | 1.00 (p < 0.001*) | 0.55 (0.14) | 0.71 |
| LDC | 2.5 (0.73) | 2.6 (0.69) | 0.14 (p = 0.42) | p < 0.001* | 2.6 (0.67) | 0.28 (p = 0.14) | p = 0.001* | |||
*Significant after Hochberg FDR procedure, family-wise p < 0.05
^Significant before Hochberg FDR procedure
PROMIS-Anx, anxiety; PROMIS-Dep, depression; PSS, perceived stress; SECD, self-efficacy; FFMQ, mindfulness; SCS-SF, self-compassion; PCQ, perceived control; DERS, emotion regulation difficulty; MAIA, interoceptive awareness
Baseline: n = 92 (MTPC), n = 44 (LDC); week 8: n = 65 (MTPC), n = 33 (LDC); week 24: n = 53 (MTPC), n = 31 (LDC)