Table 1. Characteristics of study participants by birth weight quintile.
| Quintile 1 (n = 50) |
Quintile 2 (n = 52) |
Quintile 3 (n = 52) |
Quintile 4 (n = 51) |
Quintile 5 (n = 51) |
|
|---|---|---|---|---|---|
| Age | 9.6 ± 1.6 | 9.5 ± 1.5 | 9.4 ± 1.6 | 9.5 ± 1.6 | 9.6 ± 1.7 |
| Ethnicity(EA/AA/HA) | 8/23/19 | 17/19/16 | 31/14/7 | 26/15/10 | 24/16/11 * |
| Sex (n,% male) | 26 (52%) | 23 (43%) | 26 (50%) | 34 (64%) | 27 (53%) |
| Tanner Stage (1/2/3) | 30/9/11 | 30/13/9 | 40/8/4 | 37/11/3 | 25/18/8 * |
| Height (cm) | 138.5 ± 11.8 | 139.3 ± 10.1 | 138.0 ± 8.8 | 139.4 ± 10.7 | 141.5 ± 12.1 |
| Weight (kg) | 35.2 ± 9.7 | 35.4 ± 8.4 | 34.6 ± 7.2 | 37.0 ± 10.7 | 39.6 ± 10.2 |
| Birth Weight (kg) | 2.3 ± 0.4 | 3.0 ± 0.1 | 3.3 ± 0.1 | 3.6 ± 0.1 | 4.1 ± 0.3 † |
| BMI (kg/m2) | 18.1 ± 2.9 | 18.0 ± 2.5 | 18.0 ± 2.6 | 18.8 ± 3.5 | 19.5 ± 2.8 * |
| BMI percentile | 62.4 ± 27.9 | 62.8 ± 25.7 | 64.0 ± 26.3 | 65.5 ± 29.1 | 75.7 ± 20.6 |
| Fat mass (kg) | 8.2 ± 5.5 | 8.2 ± 4.7 | 7.7 ± 4.0 | 9.1 ± 7.0 | 10.3 ± 6.1 |
| FMI (kg/m2) | 4.2 ± 2.3 | 4.1 ± 2.0 | 4.0 ± 2.1 | 4.5 ± 3.0 | 5.1 ± 2.6 |
| Fat-free mass (kg) | 24.9 ± 6.0 | 24.9 ± 5.0 | 25.1 ± 4.9 | 25.8 ± 4.6 | 27.0 ± 5.8 |
| FFMI (kg/m2) | 12.9 ± 1.4 | 12.8 ± 1.3 | 13.1 ± 1.4 | 13.3 ± 1.2 | 13.4 ± 1.2 |
| Trunk fat (kg) | 3.4 ± 2.7 | 3.3 ± 2.3 | 3.0 ± 1.9 | 3.8 ± 3.4 | 4.2 ± 2.9 |
| Trunk FMI (kg/m2) | 1.7 ± 1.2 | 1.7 ± 1.0 | 1.6 ± 1.0 | 1.9 ± 1.5 | 2.1 ± 1.3 |
| SES | 34.4 ± 13.4 | 35.1 ± 13.6 | 43.6 ± 13.6 | 39.2 ± 15.1 | 40.6 ± 15.3 † |
| MVPA (min/d) | 52.6 ± 37.2 | 57.2 ± 32.5 | 60.2 ± 31.6 | 68.8 ± 32.4 | 57.5 ± 31.5 |
*
difference at P < 0.05
†
difference at P < 0.01