Table 1. Subject characteristics, by sex.
| Parameter | Female (n = 473) | Male (n = 526) | P Value |
| Mean (SD) | Mean (SD) | ||
| Age (years) | 11.0 (3.4) | 11.7 (3.5) | 0.002 |
| BMI (kg/m2) | 20.5 (6.1) | 21.2 (7.5) | 0.16 |
| BMI percentile (CDC) | 60.7 (32.8) | 57.6 (34.6) | 0.15 |
| SBP (mmHg) | 111.2 (10.2) | 113.4 (13.1) | 0.006 |
| DBP (mmHg) | 66.8 (8.0) | 65.4 (8.3) | 0.007 |
| SBP Z-score | 0.47 (0.54) | 0.39 (0.57) | (0.021) |
| DBP Z-score | 0.32 (0.44) | 0.20 (0.38) | (0.001) |
SD; standard deviation, BMI; body mass index, SBP; systolic blood pressure, DBP; diastolic blood pressure, Z-score deviation of BP from age, sex, height specific CDC reference value, divided by the difference between the 95th and 50th CDC percentile.