Table 1.
Sample Characteristics (Mean±SE)
| Total Sample N=336 |
Age<7 N=232† |
Age>7 N=104 |
Boys N=168 |
Girls N=168 |
|
|---|---|---|---|---|---|
| Age | 9.0±0.1 | 5.9±0.2 | 9.9±0.1 | 9.1±0.2 | 8.9±0.1 |
| Height | 53.5±0.3 | 46.3±0.6 | 55.5±0.2 | 53.5±0.4 | 53.4±0.4 |
| Weight | 76.5±1.2 | 54.5±1.5 | 82.7±1.2 | 77.2±1.8 | 75.9±1.5 |
| Tanner Stage | 1.44±0.1 | 1.0±0 | 1.6±0.1 | 1.3±0.1a | 1.6±0.1b |
| BMI % | 66.0±1.5 | 75.3±3.1 | 64.6±1.6 | 66.1±2.0 | 65.9±2.1 |
| BMI z-score | 0.1±0.1 | 0.1±0.1 | −0.3±0.1 | 0.1±0.1 | −0.1±0.1 |
| Total Fat | 8.7±0.3 | 6.1±0.3 | 9.4±0.3 | 8.0±0.4a | 9.4±0.4b |
| % Fat | 24.2±0.5 | 24.8±0.9 | 24.1±0.6 | 21.7±0.7a | 26.9±0.6b |
| Total BMC | 1208.6±18.1 | 838.5±23.9 | 1312.9±17.9 | 1230.6±26.4 | 1185.6±24.4 |
| BMD | 0.92±0.01 | 0.87±0.01 | 0.92±0.01 | 0.93±0.01 | 0.91±0.01 |
| Total Sleep | 9.2 | 9.9±0.1 | 9.0±0.1 | 9.1±0.1a | 9.4±0.1b |
| Night Sleep | 9.0±0.1 | 9.4±0.1 | 8.9±0.1 | 8.9±0.1 | 9.1±0.1 |
| Nap Sleep | 0.3±0.1 | 0.5±0.1 | 0.3±0.1 | 0.3±0.1 | 0.4±0.1 |
| REE | 1192.7±13.7 | 1050.3±24.1 | 1215.1±14.9 | 1239.8±19.8 | 1140.9±17.8 |
†
denotes significant difference for all variables between age categories p<0.001.
a,b
superscript indicates significant difference between sex groups.