. Author manuscript; available in PMC: 2012 Jan 1.

Published in final edited form as: Neurotoxicol Teratol. 2011 Jan–Feb;33(1):61–68. doi: 10.1016/j.ntt.2010.07.004

Table 1.

Mean Levels of Drug Exposure and Risk by Cocaine Exposure Levels

Measure	Unexposed (n = 120)	Exposed (n = 83)	Lightly Exposed (n = 38)	Heavily Exposed (n = 45)	F-test (2, 200)	significance
Prenatal Exposure to Alcohol (drinks per day)	0.024	1.49	0.944^**	1.953^***	19.832	<.001
Prenatal Exposure to Cigarettes (cigarettes per day)	1.358	9.450	8.900^***	9.918^***	36.671	<.001
Prenatal Exposure to Marijuana (joints per day)	0.022	0.315	0.101	0.497 ^***	5.306	.006
Medical Complications Score – ln scale	0.115	0.248	0.263 ^**	0.234 ^**	6.991	.001
Environmental Risk Score – T scale	49.732	51.453	49.508	53.107 ^*	21.267	.106

Note:

p < .05;

^**

p < .01;

^***

p < .001 relative to unexposed