Table 3.
Associations between sedentary and light activity and body composition in girls with both 6th and 8th grade measures*.
| BMI β (95% CI) | |||||
|---|---|---|---|---|---|
| All Activity | Weekday Activity | Weekend Activity | Before School Activity | After School Activity | |
| Sedentary | |||||
| Mean6,8 | 0.3496 (0.01785, 0.6814) | 0.5135 (0.1832, 0.8437) | −0.01629 (−0.2556, 0.2230) | 0.7116 (0.1182, 1.3050 ) | 0.6368 (0.1454, 1.1281) |
| Deviation | 0.001110 (−0.09794,0.1002) | 0.01840 (−0.08217, 0.1190) | −0.01484 (−0.07466,0.04497) | 0.05483 (−0.1129, 0.2226) | −0.00249 (−0.1402, 0.1352) |
| Light | |||||
| Mean6,8 | −0.4227 (−0.8207, −0.02470 | −0.4585 (−0.8366, −0.08029) | −0.1444 (−0.4713, 0.1824) | −1.1274 (−1.8403,−0.4144) | −0.3927 (−0.9917, 0.2063) |
| Deviation | 0.008957 (−0.1156, 0.1335) | 0.02752 (−0.08842, 0.1434) | −0.02447 (−0.1133,0.06440) | 0.006994 (−0.2021, 0.2161) | 0.05400 (−0.1151, 0.2232) |
| Percent Body Fat β (95% CI) | |||||
|---|---|---|---|---|---|
| Sedentary | |||||
| Mean6,8 | 0.9004 (0.3190, 1.4819) | 1.1909 (0.6112, 1.7706) | 0.1005 (−0.3204, 0.5213) | 1.8692 (0.8228, 2.9155) | 1.3619 (0.4990, 2.2248) |
| Deviation | 0.2045 (−0.04047, 0.4495) | 0.3423 (0.09409, 0.5904) | −0.04151 (−0.1896, 0.1066) | 0.6522 (0.2387, 1.0657) | 0.2020 (−0.1389, 0.5428) |
| Light | |||||
| Mean6,8 | −1.1208 (−1.8179,−0.4237) | −1.1751 (−1.8377, −0.5124) | −0.4570 (−1.0297, 0.1157) | −2.8250 (−4.0797,−1.5703) | −1.0146 (−2.0660,0.03686) |
| Deviation | −0.2604 (−0.5684,0.04765) | −0.2367 (−0.5235,0.05007) | −0.1164 (−0.3364, 0.1036) | −0.7258 (−1.2417,−0.2098) | −0.02916 (−0.4482, 0.3899) |
*
Linear mixed models: Body Composition = Physical activity mean + Physical activity deviation + Race + Grade + (Field Center + School within Field Center + Student within School within Field Center included as random effects).