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Table 1 Participant characteristics and descriptive statistics by BPA tertile

From: Prenatal bisphenol a exposure and dysregulation of infant hypothalamic-pituitary-adrenal axis function: findings from the APrON cohort study

  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   
  1. Note. GM geometric mean, SE standard error of the mean