Table 3.
Within-person comparison of total daily physical activity outcomes on BOKS before school program days vs. other days in Massachusetts and Rhode Island, Fall 2016a.
| Outcome | Unadjusted mean (SD) | Adjusted mean (SE)b | Adjusted mean difference (95% CI) | P valuec |
|---|---|---|---|---|
| Steps | ||||
| BOKS day | 11,571 (4017) | 11,291 (238) | 1153 (841, 1464) | <0.001 |
| Not BOKS day | 9815 (4413) | 10,138 (236) | ||
| MVPA minutes | ||||
| BOKS day | 43.7 (48.8) | 38.9 (1.4) | 8.8 (5.3, 12.2) | <0.001 |
| Not BOKS day | 25.5 (34.8) | 30.2 (1.4) | ||
| VPA minutes | ||||
| BOKS day | 12.6 (19.4) | 10.8 (0.6) | 3.0 (1.6, 4.5) | <0.001 |
| Not BOKS day | 6.1 (12.7) | 7.8 (0.5) | ||
| Total PA minutesd | ||||
| BOKS day | 420.3 (117.0) | 406.9 (5.1) | 20.8 (13.6, 28.1) | <0.001 |
| Not BOKS day | 371.5 (124.4) | 386.1 (5.0) |
Abbreviations: BOKS, Build Our Kids' Success; SE, standard error; CI, confidence interval, MVPA, moderate-to-vigorous physical activity; VPA, vigorous physical activity; PA, physical activity.
Within-person comparisons were assessed using multivariable linear mixed-effects regression models among the sample of BOKS program participants only (n = 241 participants with a total of 792 days of observation). All models are adjusted for age, gender, total daily monitor wear hours, daily monitor wear hours during school, and daily physical activity achieved during school, and account for repeated days of observation within children and clustering of children within schools.
Adjusted means represent mean activity levels for a child wearing the monitor for the mean total daily wear time and mean daily wear time during school and engaging in mean daily physical activity levels during school.
Boldface indicates statistical significance (p < 0.05).
Total PA minutes include minutes engaged in light, moderate, or vigorous activity.