Table 1.
Sample demographics
| Mean (SD; range) | TD (n = 43) | ADHD (n = 21) | ODD/CD (n = 26) | ASD (n = 41) | Group differences |
|---|---|---|---|---|---|
| Age | 12.79 (1.61; 10.17–16) | 12.98 (1.47; 10.50–15.75) | 12.31 (1.62; 10.20–15.51) | 13.77 (1.08; 11.33–15.67) | ASD > TD*, ODD/CD** |
| IQ | 104.95 (11.67; 75–130) | 95.29 (13.26; 69–120) | 101.42 (14.68; 72–130) | 88.49 (19.71; 54–129) | TD > ASD**, ADHD** ODD/CD > ASD** |
| % male | 83.72% | 95.24% | 65.38% | 58.54% | ADHD > ADHD**, ODD/CD* TD > ASD* |
| SDQ hyperactivity | 2.53 (1.61; 0–6) | 7.95 (2.04; 3–10) | 6.58 (2.23; 1–10) | 4.62 (2.49; 0–9) | ADHD, ODD/CD, ASD > TD** ADHD > ODD/CD*, ASD** ODD/CD > ASD** |
| SDQ conduct problems | 1.16 (1.04; 0–3) | 3.58 (1.54; 1–7) | 5 (1.83; 1–8) | 1.41 (1.12; 0–3) | ADHD, ODD/CD > TD** ODD/CD > ADHD**, ASD** ADHD > ASD** |
SDQ Strengths and Difficulties Questionnaire
** p < 0.01, * p < 0.05