Table 5.
Physical activity by baseline activity level and weight status, and intervention effect*
| |
BASELINE |
|
POST-INTERVENTION |
|
INTERVENTION EFFECT* |
|
|---|---|---|---|---|---|---|
| |
Control |
Intervention |
Control |
Intervention |
|
|
| Counts/min: All (n = 700) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Estimate (CI) | p |
| Low-activity group (n = 350) |
392 (66) |
373 (59)** |
499 (231) |
557 (261)§ |
92 (41, 142) |
<0.001 |
| High-activity group (n = 350) |
615 (114) |
608 (115) |
621 (263) |
587 (239) |
10 (−67, 87) |
0.79 |
| Normal weight (n = 591) |
517 (142) |
482 (146)** |
565 (252) |
585 (248) |
62 (10, 115) |
0.02 |
| Overweight (n = 93) | 468 (160) | 406 (115) | 566 (283) | 432 (173) | −96 (−211, 19) | 0.10 |
* Analyses were adjusted for school clustering, baseline physical activity, gender, pubertal status, month of measuring physical activity, weight category and parental education. ** Intervention group mean significantly lower than control group mean, p < 0.05. § Intervention group mean significantly higher than control group mean, p < 0.05. Test of interaction condition x activity level: p = 0.16, condition x weight status: p = 0.16.