| | ASD (n = 303) | ADHD (n = 319) | p value | Cohen’s d |
|---|
| Mean (SD) | Mean (SD) |
|---|
| Age (years) | 11.22 (3.43) | 10.08 (2.74) | < 0.001** | 0.37 |
| IQa | 87.49 (24.63) | 97.50 (15.91) | < 0.001** | 0.48 |
| ABAS composite scoresb |
| Conceptual | 71.07 (15.36) | 81.38 (14.04) | < 0.001 ** | 0.70 |
| Social | 70.96 (12.43) | 85.68 (16.52) | < 0.001 ** | 1.00 |
| Practical | 64.23 (18.35) | 79.49 (17.19) | < 0.001 ** | 0.86 |
| SCQ score | 19.96 (7.86) | 7.76 (5.94) | < 0.001 ** | 1.75 |
| SWAN INA score | 4.72 (2.94) | 5.40 (2.88) | < 0.01 ** | 0.23 |
| SWAN IMP/HYP score | 3.68 (2.96) | 3.49 (3.10) | 0.43 | 0.06 |
| | n (%) | n (%) | p value | |
| Males | 242 (79.87%) | 253 (79.31%) | 0.92 | |
| Clinical co-occurring ASDc | - | 4 (1.36%) | - | |
| Clinical co-occurring ADHDd | 55 (18.97%) | - | - | |
| ASD caseness | 221 (72.94%) | 43 (13.48%) | < 0.001** | |
| ADHD caseness | 161 (53.14%) | 200 (62.70%) | 0.02* | |
- ADHD attention-deficit/hyperactivity disorder, ASD autism spectrum disorder, ABAS adaptive behavior assessment system, SCQ social communication questionnaire, SWAN strengths and weaknesses of ADHD symptoms and normal behavior questionnaire, INA inattention, HYP/IMP hyperactivity/impulsivity
- a30 ASD participants were missing IQ information and 193 ADHD participants were missing IQ information
- b24 ASD participants were missing ABAS information and 131 ADHD participants were missing ABAS information
- c13 ASD participants were missing co-occurring mental health condition information
- d25 ADHD participants were missing co-occurring mental health condition information
- *p < 0.05
- **p < 0.01
