Table 3.
Frequency of comorbid psychiatric disorders in children with ASD and children with ADHD
| ASD (n = 40) | ADHD (n = 40) | |||
|---|---|---|---|---|
| n | % | n | % | |
| Comorbid disordera | 23 | 57.5 | 16 | 40.0 |
| Internalizing disordersb | 14 | 35.0 | 5 | 12.5 |
| Anxiety disorders | 11 | 27.5 | 4 | 10.0 |
| Separation anxiety disorder | 1 | 2.5 | 2 | 5.0 |
| Social anxiety disorder | 4 | 10.0 | 1 | 2.5 |
| Specific phobia | 5 | 12.5 | 1 | 2.5 |
| Generalized anxiety disorder | 2 | 5.0 | 0 | 0.0 |
| Obsessive–compulsive disorder | 3 | 7.5 | 0 | 0.0 |
| Panic disorder | 1 | 2.5 | 0 | 0.0 |
| Agoraphobia | 0 | 0.0 | 0 | 0.0 |
| Post-traumatic stress disorder | 0 | 0.0 | 0 | 0.0 |
| Anxiety disorder not otherwise specified | 0 | 0.0 | 0 | 0.0 |
| Mood disorders | 5 | 12.5 | 2 | 5.0 |
| Major depressive disorder | 1 | 2.5 | 2 | 5.0 |
| Dysthymic disorder | 4 | 10.0 | 0 | 0.0 |
| Externalizing disordersc | 9 | 22.5 | 11 | 27.5 |
| Oppositional defiant disorder | 9 | 22.5 | 8 | 20.0 |
| Conduct disorder | 1 | 2.5 | 5 | 12.5 |
| Attention deficit hyperactivity disorder | 9 | 22.5 | 36 | 90.0d |
aParticipants met KID-SCID criteria for at least one comorbid disorder (for the ADHD sample a KID-SCID diagnosis of ADHD was excluded)
bParticipants met KID-SCID criteria for at least one anxiety disorder and/or mood disorder
cParticipants met KID-SCID criteria for ODD and/or CD
dGroup assignment was based on clinical diagnosis and therefore it was possible that not all participants with ADHD were having an ADHD diagnosis according to the KID-SCID