Table 1.

Maternal characteristics during pregnancy ($n=206$): The Health Outcomes and Measures of the Environment (HOME) Study.

Characteristic	$n$ (%)
Age at delivery (y)
$<25$	56 (27)
25–35	122 (59)
$>35$	28 (14)
Race/ethnicity
Non-Hispanic white	116 (56)
Non-Hispanic black	80 (39)
Other	10 (5)
Maternal BMI ($\mathrm{kg}/{\mathrm{m}}^2$) at 16 wk gestation
$<18.5$ (underweight)	3 (2)
$18.5–<25$ (normal weight)	79 (41)
$25–<30$ (overweight)	64 (34)
$\ge 30$ (obese)	45 (24)
Missing	15
Household income ($\$$ per y)
$<\$\mathrm{20,000}$	53 (26)
$\$\mathrm{20,000}–<\$\mathrm{40,000}$	34 (17)
$\$\mathrm{40,000}–<\$\mathrm{80,000}$	70 (34)
$\ge \$\mathrm{80,000}$	49 (24)
Parity
Nulliparous (0)	82 (41)
1	64 (32)
$2+$	53 (27)
Missing	7
Prenatal vitamin use
Never used	24 (12)
Ever used	174 (88)
Missing	8
Average blood lead concentration ($\mathrm{\mu }\mathrm{g}/\text{dL}$)a
$<0.50$	36 (18)
$\ge 0.50–<1.00$	141 (68)
$\ge 1.00$	29 (14)

Note: BMI, body mass index: .

^aAverage of up to three lead measures in maternal blood collected at 16 wk gestation, 26 wk gestation, and delivery.