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Table 1 Demographic and clinical characteristics of sample

From: BAIAP2 exhibits association to childhood ADHD especially predominantly inattentive subtype in Chinese Han subjects

  Family-based study Case-control study
  ADHD (trios) ADHD (indep.) Controls P values
N 1397 569 957  
Mean Age (SD) 9.9 (2.5) 10.5 (2.6) 15.4 (8.5) < 0.001
N Male (%) 1171 (83.9) 465 (81.7) 617 (64.5) < 0.001
N subtypes (%)     
Inattentive 706 (50.5) 295 (51.8)   
Hyperactive-impulsive 71 (5.1) 22 (3.9)   
Combined 620 (44.4) 252 (44.3)   
  1. Abbreviations: ADHD attention-deficit/hyperactivity disorder, SD standard deviation, ADHD (indep.) independent ADHD cases for case-control study, not including ADHD probands from trios sample.