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. 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.