Demographics and comorbidities between children with physician diagnosed ADHD and non-ADHD
| Non-ADHD group N=59 600 | ADHD group N=14 900 | ||
|---|---|---|---|
| n (%) | n (%) | p Value | |
| Sex | 0.99 | ||
| Girls | 12 268 (20.6) | 3067 (20.6) | |
| Boys | 47 332 (79.4) | 11 833 (79.4) | |
| Age (years) | 0.99 | ||
| 7–12 | 50 712 (85.1) | 12 678 (85.1) | |
| 13–18 | 8888 (14.9) | 2222 (14.9) | |
| Mean (SD) | 10.0 (2.49) | 10.0 (2.49) | 0.21 |
| Urbanization | <0.001 | ||
| Level 1 (highest) | 16 483 (27.8) | 5396 (36.4) | |
| Level 2 | 17 581 (29.7) | 4550 (30.7) | |
| Level 3 | 11 360 (19.2) | 2614 (17.7) | |
| Level 4 (lowest) | 13 780 (23.3) | 2252 (15.2) | |
| Parents' occupation | <0.001 | ||
| White collar | 35 156 (59.0) | 9555 (64.1) | |
| Blue collar | 16 633 (27.9) | 3526 (23.7) | |
| Others | 7811 (13.1) | 1819 (12.2) | |
| Comorbidity | |||
| Nocturnal enuresis | 286 (0.48) | 171 (1.15) | <0.001 |
| Epilepsy | 505 (0.85) | 422 (2.83) | <0.001 |
| Mental retardation | 289 (0.48) | 507 (3.40) | <0.001 |
| Autism | 142 (0.24) | 261 (1.75) | <0.001 |
| Tourette syndrome | 63 (0.11) | 126 (0.85) | <0.001 |
| Sleep disorder | 16 (0.03) | 28 (0.19) | <0.001 |
| Emotional problem | 93 (0.16) | 331 (2.22) | <0.001 |
| Reaction to acute stress | 6 (0.01) | 15 (0.10) | <0.001 |
| Adjustment disorder | 30 (0.05) | 122 (0.82) | <0.001 |
ADHD, attention deficit hyperactivity disorder.