Table 2.
Urinary sodium and potassium excretion according to the sex.
| Total (n=131) | Boys (n=68) | Girls (n=63) | p value | ||||
|---|---|---|---|---|---|---|---|
| Mean ± SD | Median (interquartile range) | Mean ± SD | Median (interquartile range) | Mean ± SD | Median (interquartile range) | ||
| Sodium (mg/d)∗ | 2235.3 ± 823.2 | 2094.2 (1640.3, 2498.0) | 2184.3 ± 783.3 | 2057.0 (1600.0, 2462.5) | 2290.3 ± 867.2 | 2138.0 (1765.3, 2669.1) | 0.4 |
| Potassium (mg/d) | 1431 ± 636.5 | 1251.6 (994.3, 1813.0) | 1469.4 ± 721.3 | 1217.7 (902.9, 1940.6) | 1389.5 ± 532.8 | 1288.3(1022.6, 1288.3) | 0.47 |
| Sodium-to-potassium ratio | 1.7 ± 0.7 | 1.7 (1.2, 2.1) | 1.7 ± 0.7 | 1.6 (1.2, 2.03) | 1.8 ± 0.7 | 1.7 (1.2, 2.2) | 0.4 |
| Salt (mg/d) | 5667.9 ± 2077.7 | 5316.3 (4166.4, 6345.0) | 5548.3 ± 1989.6 | 5224.7 (4063.9, 6254.7) | 5797.0 ± 2177.5 | 5430.6 (4483.8, 6779.4) | 0.5 |
| Creatinine (mg/d)∗ | 852.8 ± 352.7 | 842 (620, 1020) | 853.4 ± 324.4 | 866 (609.5, 1010.3) | 852.1 ± 329.7 | 789 (621, 1058) | 0.9 |
| Volume (ml/d)∗ | 0.8 ± 0.4 | 0.8 (0.7, 1.1) | 0.9 ± 0.4 | 0.8 (0.6, 1.01) | 0.9 ± 0.3 | 0.8 (0.7, 1.0) | 0.3 |
∗Variables are not normally distributed (Kolmogorov–Smirnov test). p values by one-way ANOVA for means or Mann–Whitney U test for medians.