Table 1.

Demographic and clinical details of the subjects

CharacteristicADHD, N = 223Controls, N = 223
Age at initial scan, yr, mean (SD)* 10.2 (3.2)10.6 (3.5)
Gender
    Male:female141:82141:82
Estimated IQ, mean (SD)109 (15)111 (13)
Comorbid diagnoses
    Oppositional defiant disorder, no. (%)77 (35)NA
    Conduct disorder, no. (%)15 (7)NA
    Learning disorder, no. (%)19 (9)NA
    Mood disorder, no. (%)8 (4)NA
    Anxiety disorder, no. (%)13 (6)NA
    Tic (NOS), no. (%)14 (6)NA
Clinical details
    Clinical Global Assessment Scale, mean (SD)48 (7)NA
    CBCL Attention Problems T score, mean (SD)71 (8)NA
    TRF Attention Problems T score, mean (SD)66 (10)NA
    Prior stimulant treatment, no. (%)108 (66)NA
  • NA, not applicable; NOS, not otherwise specified; CBCL, Child Behavior Checklist; TRF, Teacher Report Form.

  • *P (ADHD vs controls), t (444) = −1.4, P = 0.16.

  • P (ADHD vs controls), t (426) = −1.5, P = 0.14