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Table 2 Dichotomized symptom scale of ADHD/disruptive behavior and platelet MAO-B activity in girls

From: ADHD and Disruptive behavior scores – associations with MAO-A and 5-HTT genes and with platelet MAO-B activity in adolescents

  MAO-B activity in girls   
Dichotomized symptom scale High dimension of phenotype Mean(S.D.) Low dimension of phenotype Mean(S.D.) n/N* p p
ADHD inattentive 12.57(2.40) 13.31(3.53) 22/140 0.381 0.631
ADHD hyperactive 11.99(2.32) 13.32(3.47) 15/139 0.264 0.215
ADHD combined 11.97(1.95) 13.25(3.45) 8/139 0.646 0.291
ODD 11.50(2.18) 13.44(3.46) 18/140 0.033 0.007
CD 11.63(1.48) 13.26(3.42) 6/140 0.227 0.167
ODD or CD 11.52(2.07) 13.47(3.48) 20/140 0.013 0.017
  1. *Number of children with high dimensions of phenotype/total number of children
  2. Analyses performed using dichotomized symptom scales
  3. Analyses performed using dimensional scales