Table 2.
Descriptive statistics of boys by weight status and the Kruskal-Wallis test results.
| BMI categories | UW (n = 12) | NW (n = 82) | OW (n = 26) | H | p |
|---|---|---|---|---|---|
| Age (years) | 10.03 ± 0.31 | 10.30 ± 0.28 | 10.31 ± 0.30 | 8.8 | 0.012 |
| Height (cm) | 135.6 ± 4.1 | 139.9 ± 4.7 | 145.2 ± 6.6 | 23.7 | 0.001 |
| Body mass (kg) | 25.6 ± 2.8 | 33.5 ± 3.8 | 49.2 ± 7.5 | 73.5 | 0.001 |
| BMI (kg/m2) | 13.9 ± 1.2 | 17.1 ± 1.5 | 23.2 ± 2.0 | 79.5 | 0.001 |
| Waist circumference (cm) | 56.7 ± 2.5 | 60.7 ± 6.9 | 78.2 ± 7.2 | 67.8 | 0.001 |
| 20 m shuttle (laps) | 39.1 ± 22.8 | 34.1 ± 15.8 | 20.3 ± 10.6 | 17.7 | 0.001 |
| Wear time (min/day) | 1408.5 ± 45.8 | 1415.4 ± 44.8 | 1409.8 ± 65.9 | 0.4 | 0.829 |
| Sedentary time (min/day) | 485.2 ± 70.6 | 506.0 ± 74.6 | 534.9 ± 98.8 | 3.7 | 0.156 |
| Light activity (min/day) | 370.5 ± 65.2 | 355.5 ± 57.5 | 331.3 ± 69.2 | 4.5 | 0.106 |
| Moderate activity (min/day) | 21.4 ± 10.8 | 22.3 ± 8.9 | 16.6 ± 11.7 | 12.5 | 0.002 |
| Vigorous activity (min/day) | 17.8 ± 9.7 | 16.4 ± 8.8 | 9.9 ± 7.4 | 14.9 | 0.001 |
| MVPA (min/day) | 39.2 ± 20.5 | 38.7 ± 17.2 | 26.5 ± 18.9 | 14.1 | 0.001 |
| Sleep time (min/day) | 545.1 ± 38.9 | 539.8 ± 31.7 | 547.3 ± 29.4 | 0.607 | 1.5 |