Table 3.

Classification of exposure groups for VOCs.

VOCs	High	Low
Maternal
Toluene (n)	27	90
Toluene (μg/g cr.)	31.0 ± 92.3	2.8 ± 1.4
Age	33.8 ± 3.1	33.9 ± 3.4
Xylene (n) 2-MHA	31	86
Xylene (μg/g cr.)	98.6 ± 90.6	24.9 ± 11.3
Age	34.4 ± 3.8	33.6 ± 3.2
Xylene (n) 3,4-MHA	31	86
Xylene (μg/g cr.)	416.9 ± 394.2	129.8 ± 40.6
Age	34.3 ± 3.9	33.7 ± 3.1
Benzene (n)	28	89
Benzene (μg/g cr.)	1.2 ± 1.4	0.8 ± 0.7
Age	34.2 ± 3.9	33.7 ± 3.2
Infant
Toluene (n)	19	74
Xylene (n) 2-MHA	24	69
Xylene (n) (3,4-MHA)	23	70
Benzene (n)	20	73