Skip to main content

Table 5 Adjusteda differences (95% confidence intervals) in birth outcomes per standard deviation increase in specific gravity-adjusted urinary organophosphate ester metabolite latent factorsb estimated using structural equation regression models

From: Predictors and reproducibility of urinary organophosphate ester metabolite concentrations during pregnancy and associations with birth outcomes in an urban population

Characteristics Birth length (cm) Ponderal index (g/cm3) Gestational age at delivery BW-GAc(z-score)
BCIPP −0.22 (−1.36, 0.92) −0.01 (−0.12, 0.09) 0.33 (−0.21, 0.88) − 0.27 (− 0.64, 0.11)
BDCIPP − 0.56 (− 1.52, 0.40) 0.06 (0.00, 0.12) 0.02 (− 0.44, 0.48) − 0.12 (− 0.40, 0.16)
DPHP −0.39 (− 1.12, 0.39) 0.06 (− 0.02, 0.14) −0.09 (− 0.51, 0.33) −0.01 (− 0.28, 0.27)
ip-PPP 0.04 (− 0.66, 0.74) −0.03 (− 0.08, 0.02) −0.25 (− 0.60, 0.11) 0.07 (− 0.17, 0.32)
tb-PPP 0.20 (− 0.88, 1.28) 0.00 (− 0.11, 0.10) 0.23 (− 0.38, 0.84) −0.06 (− 0.45, 0.32)
  1. Abbreviations: BCIPP Bis(1-chloro-2-propyl) phosphate; BDCIPP Bis(1,3-dichloro-2-propyl) phosphate; BW-GA Birth weight for gestational age; cm Centimeter; DPHP Diphenyl phosphate; g Grams; ip-PPP Isopropyl phenyl phenyl phosphate; tb-PPP Tert-butyl phenyl phenyl phosphate
  2. a Adjusted for maternal pre-pregnancy BMI (kg/m2), parity (nulliparous vs. parous), maternal education level (high school diploma or less vs. some college, vs. Bachelor’s degree or higher), maternal race (white vs. non-white), maternal age (in years)
  3. b Adjusted for time of sample collection (hours; centered at noon) and season (winter vs. other)
  4. c Birth weight for gestational age z-score based on 2017 US reference curves stratified by infant sex and maternal parity