TABLE 3.
Group differences over time in main variables.
| Baseline differences between groups | Baseline to post difference within groups | Interaction effects between-groups from baseline to post | |
| β (95% CI) | β (95% CI) | β (95% CI) | |
| Intention | 0.00 (−0.27 to 0.27) | 0.04 (−0.23 to 0.30) | −0.26 (−0.62 to 0.11) |
| Motivation | |||
| Intrinsic | −0.06 (−0.32 to 0.21) | −0.01 (−0.17 to 0.15) | 0.17 (−0.05 to 0.39) |
| Identified | −0.07 (−0.26 to 0.11) | 0.04 (−0.11 to 0.21) | −0.04 (−0.26 to 0.18) |
| Introjected | 0.06 (−0.20 to 0.32) | 0.20 (−0.01 to 0.42) | −0.08 (−0.38 to 0.21) |
| External | −0.01 (−0.25 to 0.23) | 0.17 (−0.01 to 0.36) | −0.10 (−0.35 to 0.15) |
| Self-efficacy | 0.11 (−0.13 to 0.35) | −0.08 (−0.27 to 0.10) | −0.04 (−0.29 to 0.21) |
| Positive outcome expectancies | −0.03 (−0.15 to 0.08) | −0.02 (−0.09 to 0.06) | 0.05 (−0.06 to 0.18) |
| Negative outcome expectancies | 0.00 (−0.17 to 0.17) | −0.58 (−0.72 to −0.044) | −0.06 (−0.25 to 0.14) |
| Action planning | −0.04 (−0.02 to 0.11) | 0.31 (0.17 to 0.46) | −0.12 (−0.32 to 0.07) |
| Coping planning | −0.07 (−0.23 to 0.09) | 0.39 (0.24 to 0.54) | −0.08 (−0.29 to 0.12) |
| Perceived barriers | 0.04 (−0.07 to 0.16) | −0.04 (−0.13 to 0.06) | −0.08 (−0.22 to 0.05) |
| D-Score | −0.00 (−0.12 to 0.11) | 0.05 (−0.07 to 0.17) | −0.07 (−0.24 to 0.10) |
| MVPA | |||
| Accelerometer-based (min/day) | 3.23 (−4.48 to 10.95) | −9.76 (−16.04 to −3.49) | −8.37 (−16.98 to 0.23) |
| Subjective (hours/week) | 0.21 (−0.40 to 0.83) | 1.07 (0.45 to 1.68) | −0.44 (−1.30 to 0.41) |
| Steps per day | 482 (−336 to 1,300) | −835 (−1,485 to −184) | −1,323 (−2,215 to −431) |
| Depression | |||
| BDI | −1.90 (−4.74 to 0.94) | −4.59 (−6.70 to −2.47) | −0.99 (−3.97 to 1.99) |
| Hamilton | −1.72 (−3.13 to −0.31) | −3.97 (−5.18 to −2.75) | 0.01 (−1.70 to 1.73) |
Results from linear mixed models. MVPA, moderate-to-vigorous physical activity; min, minutes; β, regression coefficient representing estimated group mean difference; BDI, Beck Depression Inventory.