Table 1 Participant characteristics and descriptive statistics by BPA tertile
Lower tertile (n = 44) | Middle tertile (n = 44) | Upper tertile (n = 44) | |||||||
|---|---|---|---|---|---|---|---|---|---|
Maternal Variable | GM(SE) | Median | Range | GM(SE) | Median | Range | GM(SE) | Median | Range |
Age (years) | 29.7 (.61) | 30 | 24–40 | 30.8 (.56) | 31.5 | 20–39 | 31.3 (.63) | 32 | 22–42 |
Pre-pregnancy BMI | 24.6 (.65) | 24 | 19.8–42.3 | 25.4 (.82) | 25 | 18.4–38.5 | 25.9 (.93) | 24 | 19.1–43.1 |
Total BPA (ng/mL) | .34 (.02) | .34 | .16–.60 | .92 (.04) | .93 | .63–1.40 | 3.84 (1.58) | 3.15 | 1.43–43.42 |
Creatinine (mmol/L) | 4.01 (.44) | 4.10 | .80–12.40 | 8.06 (.72) | 9.10 | 2.30–19.10 | 11.96 (.94) | 13.10 | 3.90–32.80 |
Infant Variable | |||||||||
Gestational age at birth (weeks) | 39.5 (.19) | 40.0 | 35.3–41.6 | 39.0 (.27) | 39.2 | 33.0–41.3 | 39.2 (.21) | 39.0 | 35.6–41.7 |
Birthweight (grams) | 3501 (74) | 3418 | 2725–4904 | 3254 (86) | 3410 | 2030–4420 | 3329 (75) | 3385 | 2220–4200 |
Baseline cortisol (μg/dL) | .25 (.03) | .26 | .05–1.02 | .25 (.04) | .26 | .06–1.51 | .22 (.04) | .22 | .10–1.17 |
Percent | Percent | Percent | |||||||
Household Income | |||||||||
< $20,000 | 0 | 4.5 | 0 | ||||||
$20 k – $40 k | 2.4 | 2.3 | 9.1 | ||||||
$40 k – $70 k | 11.9 | 11.4 | 11.4 | ||||||
$70 k – $100 k | 28.6 | 22.7 | 25.0 | ||||||
> $100,000 | 57.1 | 59.1 | 54.5 | ||||||
Education | |||||||||
High school diploma | 14.3 | 6.8 | 4.5 | ||||||
College diploma | 11.9 | 15.9 | 34.1 | ||||||
University degree | 73.8 | 77.3 | 61.4 | ||||||
Ethnicity | |||||||||
White | 86.4 | 77.3 | 86.4 | ||||||
Other | 13.6 | 22.7 | 13.6 | ||||||
Marital status | |||||||||
Married | 90.7 | 81.8 | 90.9 | ||||||
Common law | 9.3 | 15.9 | 9.1 | ||||||
Single/separated/ divorced | 0 | 2.3 | 0 | ||||||
Nulliparous | 52.3 | 47.7 | 61.4 | ||||||
Infant Sex | |||||||||
Male | 50 | 50 | 50 | ||||||