From:  Visuospatial attention and intelligence in children with ADHD-hyperactive type

 Demographic and socioeconomic characteristics of the ADHD-H and control groups.

VariablesControls (n = 73)ADHD-H (n = 65)p
Age (years), mean ± SD8.7 ± 0.819.1 ± 0.350.62
Sex (% male)80.82%81.54%0.74
Parental education (years), mean ± SD13.8 ± 2.613.5 ± 2.80.48
Socioeconomic status (SES), mean ± SD45.2 ± 8.144.6 ± 8.40.67

No significant differences were observed between groups for demographic or socioeconomic variables (p > 0.05). ADHD-H: attention deficit hyperactivity disorder-hyperactive type.