Table 3 Minutes of MVPA during school hours (square root transformed) is shown as a function of group status, time, BMI and sex. Repeated measures mixed effects unconditional vs. conditional models controlling for the clustering of data structure contrast the two study groups over time with regard to time spent in MVPA during school hours.
From: Assessment of a two-year school-based physical activity intervention among 7-9-year-old children
| Â | Adjusted models* | |||||
|---|---|---|---|---|---|---|
| Â | counts per minute(cpmschool) | MVPAschool (mins/day) | ||||
|  | β | CI | p-value | β | CI | p-value |
Constant | 26.77 | (23.67, 29.85) | >.0001 | 5.79 | (4.58, 6.99) | >.0001 |
Gender | 3.71 | (3.06, 4.35) | >.0001 | 1.75 | (1.22, 2.28) | >.0001 |
Group | 0.76 | (-3.31, 4.84) | .63 | 0.79 | (-0.93, 2.51) | .27 |
BMI | -0.18 | (-0.32, -0.04) | .01 | -0.06 | (-0.11, -0.01) | .02 |
Time(mid) | -0.21 | (-1.15, 0.73) | .66 | 0.07 | (-0.34, 0.49) | .72 |
Time(post) | -0.36 | (-1.32, 0.59) | .46 | 0.42 | (-0.02, 0.86) | .06 |
Time(mid) x Group | 3.63 | (2.35, 4.91) | >.0001 | 0.61 | (0.02, 1.20) | .04 |
Time(post) x Group | 0.33 | (-0.94, 1.60) | .61 | -0.48 | (-1.26, 0.05) | .07 |
Gender x Group | Â | Â | Â | -0.74 | (-1.47, -0.01) | .05 |
Time(mid) x Gender | Â | Â | Â | -0.36 | (-1.04, 0.32) | .30 |
Time(post) x Gender | Â | Â | Â | -0.11 | (-0.83, 0.61) | .76 |
Time(mid) x Group x Gender | Â | Â | Â | 1.06 | (0.15, 1.97) | .02 |
Time(post) x Group x Gender | Â | Â | Â | 0.72 | (-0.21, 1.66) | .12 |