Table 2.

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

	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

*Number of children with high dimensions of phenotype/total number of children

^† Analyses performed using dichotomized symptom scales

^‡ Analyses performed using dimensional scales