Table 3.
Estimated between arm (Intervention change–Control change at T2) and within arm (T2–T1) mean differences (95%CI) for MVPA and secondary ActiGraph outcomes.
| ActiGraph outcomes | Intervention change–Control change T2 |
Arm × Time interactiona |
Intervention change (T2–T1) |
Control change (T2–T1) |
||||
|---|---|---|---|---|---|---|---|---|
| Net mean difference | 95%CI | χ2(1)b | p | Mean difference | 95%CI | Mean difference | 95%CI | |
| MVPA (min/week) | 49.8 | 13.6 to 86.1 | 7.27 | 0.007 | 68.7 | 41.5 to 95.9 | 18.9 | –5.1 to 42.8 |
| MV10 (min/week) | 39.5 | 11.9 to 67.1 | 7.88 | 0.005 | 49.8 | 27.7 to 72.0 | 10.3 | –5.4 to 26.1 |
| Moderate PA (min/week) | 49.5 | 13.0 to 85.9 | 7.09 | 0.008 | 64.8 | 37.5 to 92.1 | 15.3 | –8.8 to 39.4 |
| Light PA (min/week) | 30.5 | 143.7 to 204.8 | 0.12 | 0.731 | 158.7 | 27.8 to 289.6 | 128.2 | 13.1 to 243.2 |
| Sedentary time (min/week) | –65.2 | –2707 to 140.4 | 0.39 | 0.534 | –194.5 | –348.7 to –40.4 | –129.4 | –265.4 to 6.6 |
| Sedentary time (≥20-min bouts) (min/week) | –55.6 | –271.8 to 160.7 | 0.25 | 0.615 | –65.2 | –227.4 to 96.9 | –9.7 | –152.7 to 133.4 |
Abbreviations: 95%CI = 95% confidence interval; MV10 = minutes of moderate-to-vigorous physical activity completed in bouts of at least 10 min; MVPA = moderate-to-vigorous physical activity; PA = physical activity; T1= baseline; T2 = 12-weeks following baseline.
a
Bold font denotes a statistically significant result. Mean differences are estimated from the mixed model; they will be slightly different from those calculated from observed means (Table 2) due to the estimation process.
b
Wald χ2 test for the Arm × Time interaction.