Table 3 Mean (SD) and p-value for between group differences using linear mixed models
From: Addition of MoodGYM to physical treatments for chronic low back pain: A randomized controlled trial
|  | Baseline | Post-treatment (max. 8-weeks) | 6 months | 12 months | Mean differences between groups (0–12 months) | ||||
|---|---|---|---|---|---|---|---|---|---|
Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | p value | |||||
Outcome | Control group (n = 54) | Intervention group (n = 54) | Control group (n = 54) | Intervention group (n = 52) | Control group (n = 52) | Group 2 Intervention (n = 51) | Control group (n = 49) | Intervention group (n = 49) | |
Primary | |||||||||
 RMD | 9.9 (4.7) | 9.9 (4.2) | 5.8 (5.1) | 5.4 (3.8) | 5.0 (4.6) | 5.1 (4.0) | 5.3 (5.1) | 4.2 (3.7) | 0.70 |
 PSEQ | 37.8 (13.0) | 40.1 (10.0) | 44.3 (13.8) | 45.2 (12.0) | 45.7 (11.5) | 45.9 (11.7) | 47.6 (12.2) | 50.2 (9.4) | 0.52 |
Secondary | |||||||||
 Pain and function | |||||||||
  PNRS | 4.9 (2.05) | 5.1 (1.8) | 2.9 (2.0) | 2.8 (2.0) | 3.2 (2.2) | 3.2 (2.2) | 4.0 (2.1) | 3.0 (2.1) | 0.95 |
  WAI | 5.6 (2.1) | 5.7 (2.1) | 6.3 (2.3) | 6.5 (2.0) | 6.4 (2.3) | 6.5 (1.9) | 6.2 (2.5) | 6.8 (2.2) | 0.62 |
 Psychological | |||||||||
  PCS Total | 20.9 (12.5) | 20.0 (11.3) | 14.9 (10.5) | 15.5 (11.6) | 11.5 (8.8) | 13.4 (9.8) | 12.8 (10.1) | 11.8 (10.0) | 0.89 |
  PCS Rumination | 7.6 (4.3) | 7.6 (4.2) | 5.8 (4.1) | 5.6 (4.1) | 4.6 (3.7) | 5.1 (3.7) | 5.1 (4.2) | 4.5 (3.7) | 0.97 |
  PCS Magnification | 4.2 (3.0) | 3.6 (2.8) | 2.8 (2.2) | 2.9 (2.6) | 2.1 (1.8) | 2.4 (2.2) | 2.6 (2.2) | 2.1 (2.5) | 0.69 |
  PCS Helplessness | 9.1 (6.0) | 8.9 (5.6) | 6.4 (4.9) | 7.0 (5.7) | 4.8 (3.9) | 6.0 (4.6) | 5.1 (4.4) | 5.2 (4.8) | 0.61 |
  DASS21 Total | 16.8 (12.6) | 15.0 (10.1) | 13.3 (11.3) | 12.2 (9.5) | 11.0 (9.0) | 10.8 (7.3) | 11.2 (9.4) | 9.8 (8.1) | 0.49 |
  DASS21 Depression | 5.5 (5.3) | 5.3 (4.8) | 4.2 (4.5) | 4.2 (4.6) | 3.0 (3.0) | 3.7 (3.8) | 3.5 (3.5) | 3.2 (3.5) | 0.98 |
  DASS21 Anxiety | 3.6 (3.6) | 2.8 (2.9) | 3.0 (3.3) | 2.4 (2.7) | 2.6 (3.0) | 2.0 (2.1) | 2.7 (3.3) | 2.1 (2.5) | 0.19 |
  DASS21 Stress | 7.7 (4.7) | 7.0 (3.9) | 6.1 (4.3) | 5.6 (3.3) | 5.4 (3.8) | 5.2 (3.1) | 5.0 (3.7) | 4.4 (3.2) | 0.41 |