. Author manuscript; available in PMC: 2015 Apr 1.

Published in final edited form as: J Child Psychol Psychiatry. 2014 Apr;55(4):384–392. doi: 10.1111/jcpp.12168

Table 1.

Descriptive statistics for study variables and demographic variables

	Mean	SD	Range
Birth weight	3287.53	707.80	510.29–4592.62
Higher-Order Neuropsych. Functions	0	1	−3.41–2.37
Primary Neuropsych. Functions	0	1	−.259–2.86
Hyperactive/Impulsive Composite	15.37	8.26	0–27
Inattentive Composite	13.60	7.73	0–27