Clinical and demographic characteristics of children with ADHD grouped according to their learning disability (LD) status
| Characteristic | Group; mean and SD* | p value† | |
|---|---|---|---|
| ADHD with LD n = 42 | ADHD without LD n = 53 | ||
| Age, yr | 9.5 (1.7) | 8.9 (1.8) | 0.08 |
| Male:female ratio | 38:4 | 43:10 | 0.20 |
| IQ | 91.6 (10.5) | 100.3 (14.8) | 0.004 |
| Low SES‡ | 76.9% | 58.3% | 0.07 |
| CBCL ext. | 70.6 (9.3) | 69.5 (12.5) | 0.62 |
| CBCL int. | 64.2 (11.1) | 62.9 (12.2) | 0.60 |
| RASS | 39.3 (28.5) | 47.4 (27.8) | 0.16 |
| CPT overall index | 11.7 (6.8) | 9.7 (7.6) | 0.18 |
ADHD = attention-deficit hyperactivity disorder; CBCL ext. = Child Behaviour Checklist externalizing behaviour; CBCL int. = Child Behaviour Checklist internalizing behaviour; CPT = Continuous Performance Task; IQ = intelligence quotient; RASS = Restricted Academic Situation Scale; SES = socioeconomic status.
↵* Unless indicated otherwise.
↵† Significance p is related to the comparison between the 2 groups. Significance was set at p < 0.05.
↵‡ Household income is less than $30 000.