. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: Neurotoxicol Teratol. 2009 Apr 5;31(5):283–290. doi: 10.1016/j.ntt.2009.03.003

Table 1. Means (and standard deviations) of covariates.

	Tobacco-exposed (n = 7)	Unexposed (n = 11)
Environmental Risk	53.84 (10.0)	51.80 (5.4)
Environmental smoke exposure (current)	1.07 (1.2)	1.14 (1.3)
Handedness (l=left; 3=right)	2.68 (0.5)	2.71 (0.6)
Intelligence	90.50 (20.5)	92.73 (11.3)
Neonatal Health Problems	1.80 (2.5)	0.89 (1.1)
Prenatal Alcohol Exposure	0.04 (0.1)	0.01 (0.0)
Prenatal Cigarette Exposure	4.18 (3.4)	0.00 (0.0)^*

Significant group difference at p < .05.