. Author manuscript; available in PMC: 2011 Aug 1.

Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2010 Jul 1;49(8):841–849. doi: 10.1016/j.jaac.2010.05.015

TABLE 1.

Descriptive Statistics of Predictor Variables for Probands with Mother-rated Child Behavior Checklists

	M	SD

Demographics
Age (in years) (n = 166)	10.93	2.77
Sex (% male) (n = 166)	58.43%
Parental Socioeconomic Status (n = 159)	65.09	22.04
COMT Genotype
Val158Met (%Val/Val) (n = 160)	31.25%
Parenting Qualities
Positive Involvement (n = 162)	63.51	7.59
Negative/Ineffective Discipline (n = 162)	21.29	4.75
Deficient Monitoring (n = 162)	12.90	4.52
Child Behavior Checklist Measures
Aggressive Behavior (n = 166)	10.81	9.30
Direct Aggression (n = 161)	1.92	2.78
Relational Aggression (n = 164)	9.15	7.09
Attention Problems (n = 166)	6.47	5.23

Note: COMT = Catechol O-methyl transferase