Predictors of serum concentrations of polybrominated flame retardants among healthy pregnant women in an urban environment: a cross-sectional study

Table 2 Lipid adjusted concentrations and congener distributions of PBDE in maternal serum (n = 316)

Congener	N	% > LOD	Median LOD ng/g serum lipid)^a	Median (ng/g serum lipid)^b	Range (ng/g serum lipid)	Congener distribution (median %)^c
PBDE-17	298	6.7	0.50	0.35	ND-1.8	1.69
PBDE-28	316	45.6	0.50	0.42	ND-63.7	2.03
PBDE-47	316	99.1	1.20	7.90	ND-1600	38.15
PBDE-66	316	3.2	0.50	0.35	ND-2.5	1.69
PBDE-85	316	24.7	0.70	0.35	ND-38.3	1.69
PBDE-99	316	83.5	0.50	1.60	ND-377	7.73
PBDE-100	316	91.1	0.50	1.70	ND-301	8.21
PBDE-153	315	98.4	0.50	2.95	ND-206	14.24
PBDE-154	316	14.6	0.50	0.35	ND-34.1	1.69
PBDE-183	316	15.5	0.50	0.35	ND-2.9	1.69
PBDE-209	311	19.3	5.40	4.04	ND-38.2	19.51
PBB-153	314	38.9	0.50	0.35	ND-84.3	1.69

ND = non detect. The concentration of PBDE measured was less than the limit of detection (LOD).
^aMedian LOD. LODs differed between individuals due to the amount of sample collected provided for analysis, sample quantity ranged from 0.374-2.002 g, mean ± se = 1.898 ± 0.009.
^bFor samples with PBDE concentrations < LOD, the value of LOD/sqrt 2 was substituted.
^cPBDE congener distribution (median %) calculated as the percent contribution of the sum of 12 congeners to the total sum of median congener concentrations (ΣPBDE).

ISSN: 1476-069X