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Table 1 Sample characteristics

From: Preliminary evidence for altered motion tracking-based hyperactivity in ADHD siblings

  Children with ADHD (n = 45) Non-affected siblings (n = 22) Controls (n = 45) ANOVA
  M SD M SD M SD F2,109 p
Age in years 9.2 1.7 11.2 3.2 8.9 1.2 50.3a < .001
% male 77.8   59.1   44.4   10.5a .005
Conners parents DSM-IV         
 Inattentive 64.1 11.8 57.1 13.4 47.4 7.6 26.8 <.001b
 Hyperactive-impulsive 70.0 9.5 51.0 13.6 52.7 8.8 38.8 <.001
 Total 70.0 7.3 55.6 11.3 51.3 7.0 61.8 <.001c
Conners’ teacher DSM-IV         
 Inattentive 63.2 6.1 55.4” 10.0 52.9e 7.7 16.4 <.001c
 Hyperactive-impulsive 61.5 8.6 50.1d 3.5 53.5e 6.9 13.2 <.001c
 Total 64.3 7.3 55.4d 8.8 52.4e 7.2 20.8 <.001c
  1. Note. ADHD = Attention-deficit/hyperactivity disorder; DSM-IV = Diagnostic and Statistical Manual for Mental Disorders (4th edition).
  2. aχ 2.
  3. bThe ADHD and the non-affected siblings group differ significantly from the healthy control group (p < .05).
  4. cThe ADHD group differs significantly from the non-affected siblings group and from the healthy control group (p < .05).
  5. dMean and SD of Conners’ teacher ratings only available for 10 of the non-affected siblings.
  6. eMean and SD of Conners’ teacher ratings only available for 26 of the healthy controls.