Table 4.
Follow-up adjusted for baseline covariates and mean difference (intervention-control)
| Intervention | Control | Mean difference (intervention minus control) (95% CI) | p value | Effect size (95% CI) | |
|---|---|---|---|---|---|
| Sedentary time (min.d-1) | 503.9 ± 64.2 | 507.2 ± 63.4 | -3.3 (-35.3 to 28.6) | 0.83 | -0.05 (-0.53 to 0.43) |
| Sedentary time (% of wear time) | 66.5 ± 5.2 | 63.1 ± 5.2 | 3.3 (0.7 to 5.9) | 0.01* | 0.54 (0.05 to 1.03) |
| Light physical activity (min.d-1) | 205.6 ± 36.0 | 234.3 ± 36.4 | -28.7 (-46.5 to -10.8) | 0.02* | -0.68 (-1.17 to -0.18) |
| Light physical activity (% of wear time) | 27.0 ± 4.4 | 29.3 ± 4.3 | -2.3 (-4.5 to 0.2) | 0.03* | -0.46 (-0.94 to 0.03) |
| MVPA (min.d-1) | 52.2 ± 16.4 | 58.2 ± 16.0 | -5.6 (-13.6 to 2.3) | 0.16 | -0.26 (-0.74 to 0.22) |
| MVPA (% of wear time) | 6.7 ± 2.1 | 7.4 ± 2.1 | -0.6 (-1.6 to 0.4) | 0.21 | -0.03 (-0.51 to 0.45) |
| VA total activity (counts min-1) | 442.1 ± 123.3 | 507.5 ± 122.9 | -65.4 (-126.0 to -4.7) | 0.03* | -0.37 (-0.85 to 0.12) |
| VM total activity (counts min-1) | 892.5 ± 187.2 | 993.0 ± 230.7 | -100.5 (-193.3 to -7.6) | 0.03* | -0.39 (-0.89 to 0.09) |
| Weight (kg) | 52.0 ± 4.3 | 53.7 ± 4.3 | -1.7 (-2.9 to -0.4) | 0.01* | -0.14 (-0.43 to 0.16) |
| Body mass index (kg.m -2) | 21.1 ± 1.5 | 21.9 ± 1.5 | - 0.9 (-1.3 to -0.4) | 0.0001* | -0.21 (-0.51 to 0.082) |
| Percentage body fat | 22.8 ± 6.7 | 25.0 ± 6.7 | -2.2 (-4.2 to -0.2) | 0.03* | -0.20 (-0.49 to 0.09) |
| Self-efficacy for physical activity | 23.1 ± 5.2 | 22.2 ± 5.2 | 0.9 (-0.3 to 2.2) | 0.13 | 0.17 (-0.06 to 0.41) |
| Physical well-being | 48.4 ± 8.2 | 46.5 ± 8.2 | 1.9 (0.2 to 4.8) | 0.06 | 0.23 (-0.02 to 0.47) |
| Psychological well-being | 50.8 ± 9.7 | 48.3 ± 9.7 | 2.5 (0.1 to 4.8) | 0.03* | 0.25 (0.01 to 0.48) |
| Autonomy and parent relation | 55.5 ± 11.4 | 51.3 ± 11.4 | 4.2 (1.4 to 7.0) | 0.003* | 0.34 (0.10 to 0.59) |
| Peers and social support | 52.6 ± 10.3 | 51.7 ± 10.3 | 0.9 (-1.5 to 3.3) | 0.45 | 0.08 (-0.15 to 0.31) |
| School environment | 50.2 ± 9.9 | 48.2 ± 9.9 | 2.0 (-0.2 to 4.3) | 0.09 | 0.19 (-0.04 to 0.42) |
| 20 m shuttle run test (km.h-1) | 10.2 ± 0.7 | 10.2 ± 0.7 | 0.0 (-0.2 to 0.1) | 0.72 | -0.03 (-0.29 to 0.23) |
| Number of shuttles completed | 31.8 ± 11.6 | 32.6 ± 11.6 | -0.8 (-3.8 to 2.3) | 0.61 | -0.04 (-0.30 to 0.21) |
| School attendance (%) | 94.6 ± 6.2 | 94.2 ± 6.2 | 0.3 (-0.8 to 1.4) | 0.57 | 0.05 (-0.14 to 0.24) |
*Significantly different between groups. MVPA – moderate to vigorous physical activity; VA - vertical axis; VM - vertical magnitude.