Table 1 Description of the samples
| Â | ADHD (N = 34) | Controls (N = 34) | p |
|---|---|---|---|
Age (mean, SD) | 10.2 (2.0) | 10.1 (1.82) | n.s. |
   range | 7.1-13.7 | 7.1-13.9 |  |
IQ (mean, SD) | 105.6 (14.4 ) | 106.5 (15.1) | n.s. |
Ratio boys/girls | 29/5 | 28/6 | n.s. |
Parent Ratings SNAP (mean raw scores, SD) | Â | Â | Â |
   Inattention | 15.9 (5.8) | 6.6 (5.1) | .000 |
   Hyperactivity | 6.8 (3.4) | 1.4 (1.7) | .000 |
   Impulsivity | 5.8 (2.8) | 2.0 (1.9) | .000 |
   Oppositional/Aggressive | 9.3 (5.7) | 4.0 (3.1) | .000 |
SDQ (mean raw scores, SD) | Â | Â | Â |
   Hyperactivity | 7.5 (1.9) | 2.5 (2.1) | .000 |
   Behavioral problems | 3.5 (2.6) | 1.3 (1.0) | .000 |
Teacher Ratings CTRS (mean T-scores, SD) | Â | Â | Â |
   ADHD Index | 65.9 (7.3) | 47.6 (6.3) | .000 |
   DSM IV Inattentive | 65.0 (8.0) | 47.6 (6.8) | .000 |
   DSM IV Hyperactive- Impulsive | 64.0 (9.4) | 47.6 (8.0) | .000 |
   Oppositional | 59.0 (9.9) | 51.1 (7.3) | .000 |