Table 1. Gender specific 24h sodium, potassium, creatinine urinary excretion and urinary volume according to stage of sexual development.
| Boys (n = 766) | ||||
|---|---|---|---|---|
| Sodium mmol/24h | Potassium mmol/24h | Creatinine mmol/24h | Urine volumeml/24h | |
| Age | Median(interquartile range) | Median (interquartile range) | Median (interquartile range) | Median (interquartile range) |
| All | 120 (84–162) | 37 (27–49) | 6.6 (4.6–9.2) | 900 (700–1200) |
| <9 yrs (n = 303)Pre-pubertal | 98 (73–130) | 33 (25–44) | 4.9 (3.8–6.5) | 800 (600–1000) |
| 9 yrs-11 yrsand 5 months(n = 228) Peri-pubertal | 124 (94–168) | 37 (29–49) | 6.8 (5.4–8.6) | 900 (700–1250) |
| ≥11 yrs and 5months(n = 235) Adolescence | 136 (102–192) | 42 (30–54) | 9.6 (6.9–13.7) | 1100 (800–1410) |
| p for trend | <0.001 | <0.001 | <0.001 | <0.001 |
| Girls (n = 658) | ||||
| Sodium mmol/24h | Potassium mmol/24h | Creatinine mmol/24h | Urine volumeml/24h | |
| Age | Median(interquartile range) | Median (interquartile range) | Median (interquartile range) | Median (interquartile range) |
| All | 107 (77–146) | 34 (26–44) | 5.8 (4.1–8.1) | 900 (700–1205) |
| <8 yrs(n = 162) Pre-pubertal | 91 (65–118) | 29 (23–39) | 4.2 (3.3–5.6) | 750 (600–950) |
| 8–10 yrs and 2months(n = 180) Peri-pubertal | 98 (68–125) | 33 (25–40) | 5.0 (3.8–6.5) | 850 (650–1200) |
| ≥10 yrs and 2months(n = 316) Adolescence | 126 (93–172) | 39 (28–49) | 7.6 (5.6–9.9) | 1050 (800–1400) |
| p for trend | <0.001 | <0.001 | <0.001 | <0.001 |