. Author manuscript; available in PMC: 2019 Mar 22.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2018 Apr 4;29(1):49–60. doi: 10.1038/s41370-018-0031-3

Table 3.

Change in cord or child plasma PBDE concentrations (ng/g lipid) over time in GEE models adjusting for age at sample collection.

	Percent change/year (95% CI)^a	N сhildren^b	N observations^b
Cord & child samples (1998–2013)
BDE-47	−4.5 (−8.8, −2.3)	334	903
BDE-99	−6.7 (−8.8, −2.3)	334	880
BDE-100	−4.5 (−6.7, −0.9)	334	902
BDE-153	−2.3 (−6.7, 0.0)	334	901
Child samples only (2000–2013)
BDE-47	−12.9 (−18.7, −8.8)	288	576
BDE-99	−12.9 (−18.7, −8.8)	285	554
BDE-100	−10.9 (−14.9, −6.7)	288	575
BDE-153	−10.9 (−14.9, −6.7)	281	574

Percent change calculated using: ((1–10^β) × 100), where the β coefficient is estimated by regressing log₁₀-transformed PBDE concentration on year of sample collection.

Sample size varies due to non-reportable PBDE results (see Table 2)