Table 1.
Demographic Information, Stratified by Gender, Segment of the Week, and School Grade Level
| Demographics | School | Out-of-School | Weekend | |||
|---|---|---|---|---|---|---|
|
| ||||||
| Middle school (n=31) | High school (n=48) | Middle school (n=30) | High school (n=50) | Middle school (n=19) | High school (n=38) | |
| Boys | ||||||
| Age | 12.9 ±0.9 | 15.9±1.1 | 13.0 ±0.9 | 15.8 ±1.1 | 12.9 ±1.1 | 15.8±1.3 |
| BMI | 21.7 ±4.7 | 23.3±4.1 | 21.6 ±4.6 | 23.3 ±4.1 | 22.5 ±5.0 | 23.6±4.2 |
| Height (cm) | 161.7 ±12.6 | 176.5±8.7 | 162.1 ±12.8 | 175.5 ±8.6 | 159.5±14.2 | 175.9±8.5 |
| Weight (kg) | 57.4 ±16.4 | 72.8±15.4 | 57.4 ±16.7 | 72.2±15.9 | 58.1 ±17.5 | 73.5±16.7 |
| MVPAmin/day | 60.7 ±26.2 | 46.8±23.3 | 65.4 ±28.1 | 48.1±19.2 | 104.1±52.4 | 101.0±46.6 |
| MVPA%/day | 12.7 ±5.5 | 9.8±4.6 | 13.7 ±5.8 | 10.1 ±4.0 | 11.2 ±5.7 | 11.0±4.9 |
| SBmin/day | NA | NA | 277.3 ±55.9 | 298.9±52.9 | NA | NA |
| SB%/day | NA | NA | 58.1 ±10.6 | 62.7 ±8.9 | NA | NA |
| CPMday | 1,662.8±687.1 | 1,275.8±490.5 | 1,686.6±642.4 | 1,291.6±462.6 | 1,423.7±640.5 | 1,350.6±481.7 |
| Wear time (days) | 4.0 ±0.2 | 3.9±0.3 | 3.9 ±0.3 | 3.9 ±0.3 | 1.9 ±0.2 | 1.9±0.3 |
| Wear time (min/day) | 477.5 ±32.8 | 475.1±39.0 | 477.1 ±31.2 | 475.8±41.3 | 924.9 ±37.7 | 916.9±35.8 |
| Period duration | 478.7 ±30.1 | 477.7±38.2 | 482.3 ±30.5 | 476.4±64.1 | 960.0 ±0.0 | 960.0±0.0 |
| Girls | (n=33) | (n=57) | (n=30) | (n=60) | (n=27) | (n=46) |
| Age | 13.2 ±0.9 | 15.5±1.1 | 13.3 ±0.9 | 15.5 ±1.1 | 13.2 ±1.0 | 15.5 ±1.0 |
| BMI | 20.8 ±4.8 | 22.6±4.1 | 20.6 ±4.9 | 23.1 ±5.0 | 20.5 ±4.1 | 22.7 ±4.1 |
| Height (cm) | 158.1 ±9.4 | 164.8±6.4 | 157.9 ±9.5 | 163.8 ±7.2 | 158.0 ±9.5 | 163.3 ±7.3 |
| Weight (kg) | 52.4 ±15.3 | 61.3±12.2 | 52.1 ±16.2 | 62.1±14.6 | 51.7 ±13.3 | 60.9±12.8 |
| MVPAmin/day | 60.5 ±25.3 | 50.6±22.4 | 67.9 ±29.4 | 56.3±26.9 | 115.3 ±51.3 | 98.7±46.5 |
| MVPA%/day | 12.8 ±5.2 | 10.5±4.7 | 14.1 ±6.0 | 12.0 ±5.5 | 12.4 ±5.4 | 10.9 ±5.1 |
| SB min/day | NA | NA | 260.9 ±51.1 | 285.4±66.0 | NA | NA |
| SB%/day | NA | NA | 54.7 ±10.5 | 60.7±10.5 | NA | NA |
| CPMday | 1,635.1±564.9 | 1,299.5±519.8 | 1,665.8±555.8 | 1,446.2±607.0 | 1,484.6±543.4 | 1,310.6±497.1 |
| Wear time (days) | 3.9 ±0.3 | 3.9±0.3 | 3.9 ±0.3 | 3.8 ±0.4 | 1.9 ±0.4 | 2.0 ±0.2 |
| Wear time (min/day) | 471.1 ±39.9 | 487.5±79.5 | 478.6 ±40.0 | 469.5±54.0 | 921.2 ±50.2 | 908.2±40.1 |
| Period duration | 474.2 ±36.1 | 491.8±89.3 | 486.3 ±37.6 | 476.3±49.7 | 960.0 ±0.0 | 960.0 ±0.0 |
CPM, counts per minute; MVPA, moderate-to-vigorous physical activity; SB, sedentary behavior; NA, not applicable