TABLE 1.
Participant characteristics1
| Total (n = 161) | Age <9 y (n = 22) | Age ≥9 y (n = 139) | P | |
| Age (y) | 10.0 ± 0.952 | 8.7 ± 0.19 | 10.2 ± 0.84 | — |
| Height (cm) | 140.3 ± 8.3 | 134.2 ± 5.7 | 141.2 ± 8.3 | <0.001 |
| Weight (kg) | 32.8 ± 5.5 | 28.8 ± 3.9 | 33.4 ± 5.5 | <0.001 |
| BMI percentile | 42.2 ± 23.4 | 43.2 ± 26.3 | 42.0 ± 23.0 | 0.83 |
| BMI z score | −0.25 ± 0.70 | −0.22 ± 0.79 | −0.25 ± 0.69 | 0.86 |
| Fat mass (kg) | 7.6 ± 2.4 | 6.7 ± 2.3 | 7.7 ± 2.5 | 0.08 |
| Fat-free mass (kg) | 25.2 ± 4.1 | 22.1 ± 2.5 | 25.7 ± 4.1 | <0.001 |
| Race-ethnicity [n (%)] | 0.58 | |||
| White | 117 (73) | 18 (82) | 99 (71) | |
| Black | 23 (14) | 2 (9) | 21 (15) | |
| Other | 21 (13) | 2 (9) | 19 (14) | |
| PA3 category [n (%)] | 0.09 | |||
| Sedentary/low active | 90 (56) | 16 (73) | 74 (53) | |
| Active/very active | 71 (44) | 6 (27) | 65 (47) |
1
P values for differences between age groups were determined by using an independent samples t test for continuous variables and a chi-square test for categorical variables.
2
Mean ± SD (all such values).
3
PA, physical activity.