Table 1.
Subject description
| 3 years (n = 43) | 4–8 years (n = 281) | 9–13 years (n = 217) | Total (n = 541) | |
|---|---|---|---|---|
| Age (years) | 3.0 ± 0.0 | 5.9 ± 1.4a | 10.8 ± 1.4a,b | 7.6 ± 3.0 |
| Weight (kg) | 17.5 ± 9.0 | 23.2 ± 5.6a | 45.5 ± 16.5a,b | 31.6 ± 16.2 |
| Height (cm) | 99.3 ± 4.4 | 119.1 ± 11.2a | 148.7 ± 13.3a,b | 129.3 ± 20.4 |
| BMI (kg m−2) | 17.7 ± 8.8 | 16.2 ± 2.3 | 20.5 ± 9.5a,b | 18.0 ± 7.0 |
| Overweight/Obese (%) | 19.0 | 22.6 | 31.4 | 25.7 |
| 24-h UOsm (mmol kg−1) | 665 ± 209 | 732 ± 234 | 679 ± 245b | 706 ± 238 |
| 24-h UVol (mL day−1) | 441 ± 201 | 614 ± 295 | 926 ± 636a,b | 725 ± 489 |
| 24-h UVoid (number∙day−1) | 6.2 ± 2.0 | 6.8 ± 2.9 | 5.7 ± 2.5b | 6.4 ± 2.7 |
BMI body mass index, UOsm urine osmolality, UVol urine volume, UVoid urine void frequency
aDifference from 3 years (P < 0.05)
bDifference from 4–8 years (P < 0.05)