Table 2. Gender specific 24h sodium, potassium, creatinine urinary excretion and urinary volume according to BMI-Zscore.
| Boys (n = 766) | ||||
|---|---|---|---|---|
| Sodium mmol/24h | Potassium mmol/24h | Creatinine mmol/24h | Urine volumeml/24h | |
| BMI Zscore | Median (interquartile range) | Median (interquartile range) | Median (interquartile range) | Median (interquartile range) |
| < 0 (n = 208) | 111 (80–150) | 33 (25–43) | 6.0 (4.3–8.5) | 850 (602–1150) |
| 0–0.9 (n = 234) | 124 (89–160) | 38 (28–51) | 6.4 (4.6–9.4) | 950 (787–1252) |
| 1–2 (n = 240) | 114 (81–169) | 37 (27–50) | 6.9 (4.6–9.3) | 850 (650–1172) |
| > 2 (n = 84) | 135 (93–198) | 42 (32–53) | 7.1 (5.4–9.4) | 975 (762–1290) |
| p for trend | 0.010 | <0.001 | 0.068 | 0.006 |
| Girls (n = 658) | ||||
| Sodium mmol/24h | Potassium mmol/24h | Creatinine mmol/24h | Urine volumeml/24h | |
| BMI Zscore | Median (interquartile range) | Median (interquartile range) | Median (interquartile range) | Median(interquartile range) |
| < 0 (n = 190) | 98 (72–131) | 31 (23–41) | 5.4 (3.7–7.8) | 850 (700–1200) |
| 0–0.9 (n = 202) | 114 (88–153) | 36 (27–46) | 6.3 (4.5–8.7) | 920 (730–1220) |
| 1–2 (n = 216) | 108 (73–148) | 34 (24–43) | 5.6 (4.1–8.1) | 900 (650–1300) |
| > 2 (n = 50) | 116 (90–159) | 35 (28–45) | 6.3 (3.8–8.2) | 900 (737–1225) |
| p for trend | 0.002 | 0.008 | 0.031 | 0.308 |