Table 1.
Characteristics of the study sample
| Variable | Boys (n = 1,983) | Girls (n = 1,946) | P |
|---|---|---|---|
| Age (years) | 13.0 ± 3.5 | 13.1 ± 3.4 | 0.56 |
| BMI (kg/m2) | 22.1 ± 5.9 | 22.6 ± 6.3 | 0.03 |
| Race (%) | 0.44 | ||
| Non-Hispanic White | 26.2 | 24.0 | |
| Non-Hispanic Black | 27.4 | 27.2 | |
| Mexican American | 20.1 | 21.6 | |
| Other Hispanic | 10.6 | 10.4 | |
| Other | 15.7 | 16.8 | |
| Vigorous recreational PA (%) | 42.3 | 26.5 | <0.0001 |
| Moderate recreational PA (%) | 30.7 | 28.7 | 0.24 |
| Handgrip strength (kg) | 58.3 ± 25.1 | 46.1 ± 14.0 | <0.0001 |
| Systolic blood pressure (mg Hg) | 107.6 ± 10.8 | 103.7 ± 9.3 | <0.0001 |
| Diastolic blood pressure (mg Hg) | 53.9 ± 16.1 | 56.2 ± 13.9 | <0.0001 |
Mean±SD is presented unless otherwise indicated. Abbreviations: BMI, body mass index; PA, physical activity.