Table 1.
Demographic data at baseline in both ADHD and non-ADHD groups
| Characteristics | ADHD group (n = 128) | Non-ADHD group (n = 40) |
|---|---|---|
| Gender, n (%) | ||
| Boys | 108 (84.4) | 23 (57.5) |
| Girls | 20 (15.6) | 17 (42.5) |
| Ethnicity, n (%) | ||
| Han | 124 (96.9) | 39 (97.5) |
| Others | 4 (3.1) | 1 (2.5) |
| Body weight (kg), mean ± SD | 33.0 ± 9.3 | 37.5 ± 8.3 |
| Age (years), median (mean ± SD) | 9 (9.2 ± 1.5) | 10 (9.7 ± 1.7) |
| Age distribution, n (%) | ||
| ≤7 years | 14 (10.9) | 7 (17.5) |
| 8 years | 34 (26.6) | 3 (7.5) |
| 9 years | 32 (25.0) | 7 (17.5) |
| 10 years | 23 (18.0) | 9 (22.5) |
| 11 years | 13 (10.2) | 8 (20.0) |
| ≥12 years | 12 (9.4) | 6 (15.0) |
ADHD: Attention-deficit hyperactivity disorder; SD: Standard deviation.