Table 1 Baseline demographic characteristics of participants
| Â | 3-5 years (n=70) | 6-11 years (n=70) | 12-17years (n=100) | 3-17 years (n=240) |
|---|---|---|---|---|
Age (years) | ||||
 Mean (SD) | 4.4(0.7) | 8.7(1.4) | 13.9(1.3) | 9.6(4.2) |
 Median (IQR) | 4.0(4.0,5.0) | 9.0(8.0,10.0) | 14.0(13.0,15.0) | 10.0(5.0,13.0) |
 Min-Max | 3.0-5.0 | 6.0-11.0 | 12.0-17.0 | 3.0-17.0 |
Height (cm) | ||||
 Mean (SD) | 110.8(5.9) | 135.0(11.0) | 164.2(9.0) | 140.1(24.1) |
 Median (IQR) | 111.3(107.0,114.5) | 136.0(128.0,141.0) | 163.5(157.5,171.0) | 139.3(115.0,161.0) |
 Min-Max | 98.5-124.0 | 108.0-160.0 | 141.0-186.0 | 98.5-186.0 |
Weight (kg) | ||||
 Mean (SD) | 18.3(2.2) | 31.4(10.1) | 54.6(12.7) | 37.2(18.4) |
 Median (IQR) | 17.8(16.9,19.4) | 28.5(25.1,35.1) | 52.6(46.7,59.7) | 32.5(20.1,51.2) |
 Min-Max | 13.5-27.4 | 17.5-73.9 | 28.8-94.5 | 13.5-94.5 |
Gender | ||||
 Male | 36(51.4) | 32(45.7) | 58(58.0) | 126(52.5) |
 Female | 34(48.6) | 38(54.3) | 42(42.0) | 114(47.5) |
Ethnicity | ||||
 Han Chinese | 68(97.1%) | 69(98.6%) | 99(99.0%) | 236(98.3%) |
 Other | 2(2.9%) | 1(1.4%) | 1(1.0%) | 4(1.7%) |