Table 3.

REVISED. Comparison of Chemical Analyte Concentrations between Cohorts Calculated from Multivariate Regression Models Adjusted for Age, Gestational Age, Race/Ethnicity, Parity, And Insurance Status^a,^c

chemical analyte	n	% differenceb	2008–2009 LSGM (95% CI)	2011–2012 LSGM (95% CI)	p
PBDEs (ng/g lipid)
BDE-28	59	−43 (−60, −17)	2.15 (1.49, 3.09)	1.23 (0.85, 1.78)	0.004
BDE-47	59	−44 (−61, −18)	40.3 (27.9, 58.1)	22.7 (15.7, 32.9)	0.003
BDE-99	59	−44 (−61, −17)	9.69 (6.64,14.2)	5.48 (3.74, 8.02)	0.004
BDE-100	59	−47 (−65, −19)	10.0 (6.60,15.2)	5.31 (3.48, 8.09)	0.004
BDE-153	59	−25 (−47, 6)	23.0 (16.2, 32.5)	17.2 (12.1, 24.4)	0.10
ΣPBDEs	59	−39 (−56, −15)	90.0 (64.7, 125.2)	54.6 (39.2, 76.2)	0.004
PCBs (ng/g lipid)
PCB-74	59	−26 (−46, 1)	1.26 (0.92, 1.72)	0.93 (0.68, 1.27)	0.06
PCB-118	59	−10 (−34, 24)	2.04 (1.49, 2.81)	1.85 (1.34, 2.54)	0.53
PCB-138	59	−6 (−31, 29)	2.96 (2.17, 4.05)	2.79 (2.04, 3.82)	0.70
PCB-153	59	−9 (−36, 30)	4.34 (3.05, 6.17)	3.96 (2.78, 5.65)	0.61
PCB-180	59	−42 (−59, −18)	3.83 (2.72, 5.38)	2.23 (1.59, 3.15)	0.003
ΣPCBs	59	−20 (−40, 7)	15.1 (11.3, 20.1)	12.0 (8.98, 16.1)	0.13
OH-PBDEs (ng/mL)
5-OH-BDE47	58	−83 (−92, −66)	0.042 (0.020, 0.088)	0.007 (0.003, 0.014)	<0.0001
6-OH-BDE47	58	−84 (−91, −71)	0.039 (0.022, 0.070)	0.006 (0.004, 0.011)	<0.0001
ΣOH-PBDEs	58	−86 (−92, −75)	0.099 (0.055, 0.179)	0.014 (0.008, 0.025)	<0.0001
ΣOH-PCBs (ng/mL)	58	−8 (−41, 43)	0.020 (0.013, 0.031)	0.018 (0.012, 0.028)	0.71

^aChemical analyte concentrations were natural log-transformed in multivariate regression models.

^bReference group is 2008−2009 cohort.

^cAbbreviations: CI = confidence intervals; LSGM = least-squares geometric mean.