Table 1.
Baseline demographic features comparing boys and girls
| Variable | Boys (n=411) | Girls (n=270) | P Value |
|---|---|---|---|
| Age, yr | 11.0 [7.4, 14.4] | 11.3 [7.8, 14.8] | 0.29 |
| Black race | 22 (92) | 19 (52) | 0.34 |
| Hispanic ethnicity | 12 (49) | 18 (49) | 0.03 |
| Tanner stage | 0.01 | ||
| 1 | 62 (242) | 51 (129) | |
| 2 | 8 (33) | 9 (23) | |
| 3 | 8 (32) | 11 (28) | |
| 4 | 15 (59) | 15 (39) | |
| 5 | 7 (27) | 14 (36) | |
| Glomerular diagnosis | 23 (94) | 33 (90) | 0.004 |
| CKD duration, yr | 8.5 [4.4, 13.1] | 7.4 [3.3, 11.5] | 0.04 |
| iGFR, ml/min per 1.73 m2 | 53.6 [38.2, 72.4] | 49.6 [38.9, 68.0] | 0.18 |
| eGFR, ml/min per 1.73 m2 | 52.6 [37.9, 66.9] | 53.2 [41.0, 67.7] | 0.41 |
| Urine protein-to-creatinine, mg/mg | 0.33 [0.11, 1.06] | 0.39 [0.13, 0.94] | 0.33 |
| Height, cm | 140.8 [118.0, 163.3] | 139.4 [120.5, 157.5] | 0.24 |
| Height z-score | −0.47 [−1.26, 0.28] | −0.66 [−1.59, 0.15] | 0.05 |
| Weight, kg | 37.9 [22.6, 56.1] | 37.6 [24.4, 54.2] | 0.98 |
| Weight z-score | 0.09 [−0.77, 0.89] | −0.10 [−1.03, 0.98] | 0.31 |
| Body mass index, kg/m2 | 18.5 [16.3, 21.8] | 18.7 [16.3, 23.3] | 0.37 |
| BMI z-score | 0.47 [−0.31, 1.29] | 0.43 [−0.31, 1.38] | 0.95 |
| Obese | 17 (67) | 17 (45) | 0.92 |
| Lean body mass, kg | 27.4 [17.3, 42.5] | 25.9 [17.1, 36.0] | 0.03 |
Continuous variables expressed as median [interquartile range]. Categorical variables expressed as percentage (number of subjects). eGFR calculated using bedside CKiD equation. iGFR, iohexol GFR; BMI, body mass index.