Table 2.
Cross-sectional sedentary activity from accelerometry by body mass index (BMI) or percent body fat in 8th Grade
| BMI | Percent Body Fat | |||||||
|---|---|---|---|---|---|---|---|---|
| 5th - 85th percentile (N=2007) | 85th - <95th percentile (N=543) | ≥ 95th percentile (N=535) | p-value | <30% (N=1349) | 30-34% (N=612) | ≥35% (N=1124) | p-value | |
| Hours of sedentary activity (all days) | 8.51 (0.07) | 8.59 (0.08) | 8.58 (0.08) | 0.2285 | 8.47 (0.07) | 8.58 (0.08) | 8.60 (0.07) | 0.0035 |
| Hours of sedentary activity (Weekend) | 6.53 (0.14) | 6.54 (0.15) | 6.56 (0.15) | 0.9285 | 6.49 (0.14) | 6.59 (0.15) | 6.56 (0.14) | 0.3558 |
| Hours of sedentary activity (Weekday) | 9.31 (0.07) | 9.41 (0.08) | 9.39 (0.08) | 0.0816 | 9.26 (0.07) | 9.38 (0.08) | 9.42 (0.07) | 0.0004 |
| Hours of light activity (all days) | 5.01 (0.06) | 4.96 (0.07) | 4.96 (0.07) | 0.4032 | 5.05 (0.07) | 4.94 (0.07) | 4.95 (0.07) | 0.0075 |
| Hours of light activity (Weekend) | 4.38 (0.06) | 4.39 (0.07) | 4.36 (0.07) | 0.8472 | 4.43 (0.06) | 4.34 (0.07) | 4.35 (0.06) | 0.1349 |
| Hours of light activity (Weekday) | 5.26 (0.07) | 5.19 (0.08) | 5.20 (0.08) | 0.2261 | 5.30 (0.07) | 5.19 (0.07) | 5.19 (0.07) | 0.0051 |
Mean (SE)
Means and p-values from mixed model analyses: Sedentary or Light Activity = Body Composition + Race + (Field Center + School within Field Center included as random effects).