Table 3 Demographic and baseline data of the pooled sample
| Â | Placebo-controlled studies | All studies | ||||
|---|---|---|---|---|---|---|
Characteristics | Children (N = 275) | Adolescents (N = 112) | p-value | Children (N = 611) | Adolescents (N = 183) | p-value |
Gender | Â | Â | 0.45 | Â | Â | 0.152 |
   Female (n, %) | 44 (16.0) | 16 (14.3) |  | 115 (18.8) | 21 (11.5) |  |
   Male (n, %) | 231 (84.0) | 96 (85.7) |  | 496 (81.2) | 162 (88.5) |  |
Age, mean (SD), y | 8.7 (1.53) | 13.0 (1.04) | NA | 8.7 (1.51) | 13.0 (0.99) | NA |
ADHD subtype | Â | Â | 0.002 | Â | Â | <0.001 |
   Combined (n, %) | 223 (81.1) | 72 (64.3) |  | 508 (83.1) | 133 (72.7) |  |
   Hyperactive/impulsive (n, %) | 10 (3.6) | 7 (6.3) |  | 14 (2.3) | 10 (5.5) |  |
   Inattentive (n, %) | 42 (15.3) | 33 (29.5) |  | 89 (14.6) | 40 (21.9) |  |
ADHD-RS, mean (SD) | Â | Â | Â | Â | Â | Â |
   Total score | 41.4 (7.42) | 38.4 (7.83) | 0.002 | 42.1 (7.87) | 41.0 (8.57) | 0.004 |
   Inattentive subscore | 21.6 (3.70) | 21.9 (3.85) | 0.35 | 22.1 (3.80) | 22.5 (3.90) | 0.374 |
   Hyperactive/impulsive subscore | 19.8 (5.51) | 16.5 (6.53) | <0.001 | 20.0 (5.79) | 18.4 (6.67) | <0.001 |