Table 3.

Predictors of %CDT at term

Potential predictorsa	Regression coefficient	P-value
Baseline %CDT	0.48	<0.001
Maternal age	−0.01	0.053
Marijuana	−0.05	0.022
Cocaine	0.01	0.909
Methamphetamines	−0.03	0.284
Viral hepatitis	−0.04	0.123
Tobacco	−0.03	0.196

^aOther potential predictors (use of multi-vitamins and iron supplements, weight gain during pregnancy, parity and use of other illicit drugs) were not significant in univariate analysis and were not included in the final model. %CDT values were log-transformed.