Table 2.
Comparisons between trial and control groups in terms of perceived stress at baseline (time 1), 6 months (time 2), 15 months (time 3), and 21 months (time 4) after the intervention.
| Time | Time 1 | Time 2 | Time 3 | Time 4 | Between-group comparison (treatments) | Within-group comparison (time) | Interaction between time and treatments |
|---|---|---|---|---|---|---|---|
| Group | M (SD) | M (SD) | M (SD) | M (SD) | |||
| Control | 36.05 (3.11) | 48.37 (3.69) | 50.65 (3.75) | 61.1 (4.06) | P < 0.001 | P < 0.001 | P < 0.001 |
| Inter. 1 | 34.78 (2.91) | 29.35 (4.38) | 27.6 (4.56) | 24.53 (4.44) | |||
| Inter. 2 | 35.03 (2.99) | 31.87 (3.24) | 28.8 (3.42) | 25.85 (3.86) | |||
| Inter. 3 | 34.45 (3.19) | 29.6 (3.46) | 26.65 (3.85) | 21.73 (4.35) |
M: mean; SD: standard deviation; NS: nonsignificant; inter.: intervention.