Fetal Growth and Prenatal Exposure to Bisphenol A: The Generation R Study

http://dx.doi.org/10.1289/ehp.1205296



Table 1. Baseline characteristics of all women with at least one available BPA measurement (= 219) participating in the Generation R cohort.
Characteristics Value
Values aren (%) or mean ± SD for categorical variables unless otherwise indicated. Educational levels were defined as low (primary school, 3 years secondary school), mid-low (> 3 years secondary school, intermediate vocational ­training), mid-high (higher vocational training, bachelor’s degree), and high (higher academic education).
Maternal  
Age at intake (years) 30.8 ± 5.2
Weight before pregnancy (kg) [median (interquartile range)] 63.0 (15.3)
Height measured at intake (cm) [median (interquartile range)] 168.0 (11.0)
Educational level  
Low 39 (17.8)
Mid-low 56 (25.6)
Mid-high 55 (25.1)
High 50 (22.8)
Missing 19 (8.7)
Ethnicity  
Dutch 120 (54.8)
Surinamese and Dutch Antilleans 19 (8.7)
Moroccan and Turkish 29 (13.2)
Other 34 (15.5)
Missing 17 (7.8)
Parity  
Nulliparous 112 (51.1)
Multiparous 99 (45.2)
Missing 8 (3.7)
Smoking  
Yes, during pregnancy 27 (12.3)
Yes, until pregnancy was known 10 (4.6)
No 158 (72.1)
Missing 24 (11.0)
Alcohol  
Yes, during pregnancy 74 (33.8)
Yes, until pregnancy was known 28 (12.8)
No 92 (42.0)
Missing 25 (11.4)
Folic acid use  
No 40 (18.3)
Yes, postconception start 49 (22.4)
Yes, preconception start 82 (37.4)
Missing 48 (21.9)
Birth outcomes  
Gestational age at birth (weeks) [median (interquartile range)] 40 (2.00)
Birth weight (g) 3372.28 ± 589.14
Male sex 105 (47.9)
Head circumference at birth (cm) 33.84 ± 1.49
Length at birth (cm) 50.14 ± 2.17
First-trimester gestational age at urine collection (weeks) 13.24 ± 1.74
Second-trimester gestational age at urine collection (weeks) 20.67 ± 1.12
Third-trimester gestational age at urine collection (weeks) 30.37 ± 1.53
Urine creatinine (g/L) [median (interquartile range)] 0.69 (0.66)