Table 2.
Demographic and clinical characteristics of the study groups.
| ASD group | ADHD group | ADHD-ASD group | p | |
|---|---|---|---|---|
| N | 31 | 25 | 35 | |
| Gender (M:F) | 27:4 | 22:3 | 28:7 | 0.625 |
| Age (years) | 7.7 ± 2.8 | 8.5 ± 1.9 | 7.5 ± 2.5 | 0.300 |
| IQ | 81.4 ± 18.7 | 103.3 ± 17.0 | 76.5 ± 20.6 | <0.001 |
| VABS-II | ||||
| Socialization | 71.5 ± 11.2 | 88.4 ± 7.5 | 68.6 ± 13.0 | <0.001 |
| Communicativon | 75.3 ± 11.8 | 87.3 ± 8.7 | 71.0 ± 10.0 | <0.001 |
| Daily living skills | 73.6 ± 8.4 | 89.4 ± 12.8 | 70.9 ± 13.6 | <0.001 |
| Motor skills | 84.5 ± 11.7 | 95.3 ± 12.1 | 80.7 ± 14.4 | <0.001 |
| ABC | 71.9 ± 8.2 | 86.8 ± 8.0 | 69.4 ± 10.6 | <0.001 |
| CPRS-R (ADHD Index) | ||||
| PI | 74.3 ± 10.5 | 78.4 ± 10.7 | 0.163 | |
| PH | 68.7 ± 13.2 | 68.2 ± 12.0 | 0.893 | |
| CB | 73.9 ± 12.0 | 75.6 ± 9.6 | 0.631 | |
| PI : CB | 5:20 | 11:24 | 0.324 | |
| ADOS-2 | ||||
| ADOS value | 16.5 ± 4.9 | 15.2 ± 4.5 | 0.244 | |
| CSS (comparison severity scores) | 7.8 ± 1.7 | 7.6 ± 1.6 | 0.622 |
Quantitative variables presented as mean ± standard deviation. VABS-II, Vineland Adaptive Behaviour Scale, second edition; CPRS-R: Conners’ Parent Rating Scale-Revised: Long Version; ADOS-2: Autism Diagnostic Observation Schedule- Second Edition. ABC, Adaptive Behaviour Composite; PI, Prevalent inattentive clinical presentation; PH, Predominantly Hyperactivity/Impulsivity clinical presentation; CB, Combined clinical presentation; CSS, Calibrated Severity Score. Quantitative variables presented as mean ± standard deviation.