Table 1 Mean Scores of Four Comparison Groups on Demographic and HIA-CP Variables
| Â | Non-HIA-CP (n= 517) | HIA-only (n= 48) | CP-only (n= 23) | HIA-CP (n= 29) | ||||
|---|---|---|---|---|---|---|---|---|
Variable | M | (SD) | M | (SD) | M | (SD) | M | (SD) |
Demographics | ||||||||
   Age | 9.60 | (1.20) | 9.37 | (1.16) | 9.73 | (1.29) | 9.36 | (1.27) |
   Gender (% male) | 45.26a |  | 62.50b |  | 52.17a, b |  | 65.52b |  |
   IQ | 106.30a |    (16.13) | 97.90b | (19.58) | 101.35a, b | (20.24) | 92.81b | (14.22) |
SDQ (Teacher) | ||||||||
   Hyperactivity | 1.66 a | (1.91) | 8.10b | (0.99) | 3.52c | (2.08) | 8.97d | (1.12) |
   Conduct Problems | 0.42a | (0.80) | 1.71b | (0.99) | 4.39c | (0.58) | 5.52d | (1.62) |