TABLE 2—
Outcome Variables Among Girls Who Attended Control and Intervention Schools
| Unadjusted Means (SE)a | Race/Ethnicity, BMI, and Wave Controlleda | ||||||||||
| Control | Intervention | Control | Intervention | Adjusted Means (SE)at Follow-Upbc | |||||||
| Pre | Post | Pre | Post | Pre | Post | Pre | Post | Control | Intervention | P | |
| ≥ 2 blocks of moderate-to-vigorous physical activity/day, % | 72.9 (2.3) | 70.8 (2.0) | 68.6 (2.8) | 72.0 (1.9) | 73.9 (2.6) | 72.0 (1.8) | 70.9 (2.1) | 69.3 (3.4) | 70.3 (2.2) | 72.3 (1.8) | 0.53 |
| ≥ 1 block of vigorous physical activity/day, % | 45.6 (3.3) | 39.1 (3.0) | 40.2 (3.3) | 43.0 (3.9) | 46.9 (3.2) | 44.1 (2.8) | 37.6 (3.0) | 40.6 (2.9) | 36.4 (2.9) | 44.5 (2.6) | 0.05 |
| ≥ 85th percentile of BMI, % | 33.3 (2.2) | 34.4 (2.0) | 33.4 (2.2) | 35.0 (2.1) | 33.6 (2.5) | 35.1 (2.0) | 33.3 (2.3) | 33.8 (2.1) | 33.9 (1.1) | 35.0 (0.9) | 0.5 |
| ≥ 95th percentile of BMI, % | 18.5 (1.6) | 16.6 (1.5) | 18.9 (1.6) | 17.7 (1.5) | 18.7 (1.9) | 16.9 (1.5) | 18.2 (1.8) | 16.4 (1.6) | 17.6 (1.0) | 17.7 (0.8) | 0.97 |
Note. BMI = body mass index; block = 30-minute time period.
aThere were no significant differences between the control and intervention schools at either pre- or post-intervention time points.
bANCOVA for physical activity variables, which were controlled for baseline value, wave, interaction of wave and treatment group, BMI, race/ethnicity, and school (N = 1604; control = 741, intervention = 863).
cANCOVA for BMI, which was controlled for baseline value, wave, interaction of wave and treatment group, race/ethnicity, and school (N = 1539; control = 712, intervention = 827).