Table 1.
Sample characteristics of this study.
| Variables | n/Mean | %/SD | |
|---|---|---|---|
| Age | 13.82 | 2.1 | |
| Gender | |||
| Boy | 1268 | 52.7 | |
| Girl | 1139 | 47.3 | |
| Siblings | |||
| Yes | 1184 | 49.2 | |
| No | 1223 | 50.8 | |
| Living with parent | |||
| Yes | 2018 | 83.8 | |
| No | 389 | 16.2 | |
| Grade | |||
| 4 | 355 | 14.7 | |
| 5 | 334 | 13.9 | |
| 7 | 353 | 14.7 | |
| 8 | 415 | 17.2 | |
| 10 | 515 | 21.4 | |
| 11 | 435 | 18.1 | |
| Residence | |||
| Rural | 277 | 11.5 | |
| Suburban | 526 | 21.9 | |
| Urban | 1604 | 66.6 | |
| Father Education Level | |||
| Middle school or below | 623 | 25.9 | |
| High school | 595 | 24.7 | |
| Undergraduate | 772 | 32.1 | |
| Graduate | 137 | 5.7 | |
| Unknown | 280 | 11.6 | |
| Mother Education Level | |||
| Middle school or below | 770 | 32.0 | |
| High school | 512 | 21.3 | |
| Undergraduate | 732 | 30.4 | |
| Graduate | 114 | 4.7 | |
| Unknown | 279 | 11.6 | |
| Family affluence | 5.09 | 1.5 | |
| MVPA guideline | |||
| Not meet | 2250 | 93.5 | |
| Meet | 157 | 6.5 | |
| Screen guideline | |||
| Not meet | 1368 | 56.8 | |
| Meet | 1039 | 43.2 | |
| Sleep guideline | |||
| Not meet | 1674 | 69.5 | |
| Meet | 733 | 30.5 | |
| 24 h movement guideline number | |||
| None | 866 | 36.0 | |
| One | 1175 | 48.8 | |
| Two | 344 | 14.3 | |
| Three | 22 | 0.9 | |
| 24 h movement guideline combinations | |||
| None | 866 | 36.0 | |
| MVPA only | 44 | 1.8 | |
| Screen only | 718 | 29.8 | |
| Sleep only | 413 | 17.2 | |
| MVPA + screen | 46 | 1.9 | |
| MVPA + sleep | 45 | 1.9 | |
| Screen + sleep | 253 | 10.5 | |
| All | 22 | 0.9 | |
| General physical fitness | |||
| Very poor | 78 | 3.2 | |
| Poor | 297 | 12.3 | |
| Average | 1254 | 52.1 | |
| Good | 581 | 24.1 | |
| Very good | 197 | 8.2 | |
| Cardiorespiratory fitness | |||
| Very poor | 90 | 3.7 | |
| Poor | 341 | 14.2 | |
| Average | 1140 | 47.4 | |
| Good | 621 | 25.8 | |
| Very good | 215 | 8.9 | |
| Muscular strength | |||
| Very poor | 85 | 3.5 | |
| Poor | 380 | 15.8 | |
| Average | 1239 | 51.5 | |
| Good | 549 | 22.8 | |
| Very good | 154 | 6.4 | |
| Speed/Agility | |||
| Very poor | 63 | 2.6 | |
| Poor | 305 | 12.7 | |
| Average | 1120 | 46.5 | |
| Good | 667 | 27.7 | |
| Very good | 252 | 10.5 | |
| Flexibility | |||
| Very poor | 166 | 6.9 | |
| Poor | 530 | 22.0 | |
| Average | 1031 | 42.8 | |
| Good | 491 | 20.4 | |
| Very good | 189 | 7.9 |
Note. SD: standard deviation.