Table 3.

Adjusted effect of personal airborne exposure to B[a]P measured in the second trimester of pregnancy in mother/newborn pairs on the cord blood (ln-transformed) concentrations of PAH-DNA adducts (per 10⁸ nucleotides). Multivariable regression model (N = 362, R-squared = 0.183

Predictors	Coef.	t	P>t	[95% Conf. Interval]		VIF*	Partial Eta2**
Maternal adducts***	0.380	7.88	0.000	0.285	0.474	1.01	0.148
Season of birth****	−0.067	−1.29	0.197	−0.168	0.035	1.02	0.005
Prenatal airborne B[a]P level
<1.15 ng/m3	reference
1.16 – 5.69 ng/m3	0.049	0.82	0.411	−0.068	0.166	1.32	0.002
>5.69 ng/m3	0.192	3,14	0.002	0.072	0.312	1.34	0.027

^*VIF = variance inflation factor

^**Eta² = effect size

^***ln-transformed values

^****1 = non-heating season (April – September), 2 = heating season (October – March)