Table 1 Demographics and clinical characteristics of study participants.

N

479

556

Age (mean (SD))

12.15 (3.16)

10.81 (3.04)

<0.001

Diagnosis (%)

<0.001

TD

93 (19.4)

113 (20.3)

ADHD

161 (33.6)

374 (67.3)

ASD

172 (35.9)

61 (11.0)

OCD

53 (11.1)

8 (1.4)

Sex = Male (%)

345 (72.0)

371 (66.7)

0.076

Child Behaviour Checklist - Attentional Problems Subscore (mean (SD))

63.46 (10.44)

63.18 (10.15)

0.66

Social Communication Questionnaire - Total Score (mean (SD))

10.30 (9.09)

7.53 (5.06)

<0.001

Toronto Obsessive-Compulsive Scale - Total Score (mean (SD))

−16.97 (29.07)

N/A

Child Behaviour Checklist - Obsessive-Compulsive Subscore (mean (SD))

N/A

49.51 (9.82)

Weschler Intelligence Scale for Children IQ (mean (SD))

102.88 (17.27)

100.72 (16.89)

0.073