Table 1.
Participant demographics. Reported values are median (interquartile range (IQR)). P values are not corrected for multiple comparisons (6 comparisons)
| ASD (n = 192) | ADHD (n = 109) | OCD (n = 50) | TD (n = 65) | Group effect (uncorrected P value) | |
|---|---|---|---|---|---|
| Age | 12.0(5.6) | 11.1(4.1) | 12.3(4.2) | 11.6(7.5) | 0.06 |
| Sex (m:f) | 155:37 | 89:20 | 29:21 | 34:31 | <0.0001 Male ASD, ADHD > OCD, TD |
| Full-scale IQ | 96.5(29.7) | 102.5(20.0) | 115.0(15.5) | 110.0(18.0) | <0.0001 ASD < ADHD<OCD, TD |
| SCQ | 20.0(10.0) | 5.0(8.0) | 4.5(6.8) | 1.0(3.0) | <0.0001 TD < OCD, ADHD< ASD |
| SCQ—social communication | 14.0(9.0) | 3.0(6.0) | 2.0(4.0) | 1.0(3.0) | <0.0001 TD < OCD < ADHD < ASD |
| SWAN—inattention | 5.0(5.0) | 7.0(4.0) | 0.5(3.7) | 0(0) | <0.0001 TD < OCD < ASD < ADHD |
| SWAN—hyperactivity | 3.0(5.0) | 3.0(6.0) | 0(1.7) | 0(0) | <0.0001 TD < OCD < ASD < ADHD |
| TOCS | −3.0(29.5) | −17.0(45.0) | 20.5(24.0) | −42.0(53.5) | <0.0001 TD < ADHD<ASD < OCD |
| CBCL—anxiety problems | 67.5(17.0) | 60.0(16.0) | 70.0(9.5) | 51.0(4.0) | <0.0001 TD < ADHD<ASD,OCD |
| CBCL—internalizing problems | 65.0(12.7) | 65.0(14.5) | 68.0(12.5) | 48.0(12.0) | <0.0001 TD < ASD, ADHD, OCD |
| CBCL—externalizing problems | 60.0(15.0) | 61.0(15.0) | 53.0(12.0) | 40.0(14.0) | <0.0001 TD,OCD < ASD,ADHD |
Note: Fifty-seven of the 416 participants were missing IQ data.
CBCL, Child Behavior Checklist; SWAN, The Strengths and Weaknesses of Attention-Deficit/Hyperactivity Disorder Symptoms and Normal Behavior Scale (SWAN); TOCS, Toronto Obsessive Compulsive Scale.