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Table 3 Median and interquartile ranges of lipid-adjusted PBDE concentrations (ng/g lipid)b in maternal blood collected upon delivery by demographic, dietary and lifestyle characteristics

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

Characteristics/Predictors PBDE 47 PBDE 99 PBDE 100 PBDE 153a
  Median (IQR) Median (IQR) Median (IQR) Median (IQR)
Demographic
  Race/Ethnicity     
African American 9.20 (19.8) 1.70 (3.9) 1.90 (2.6) 3.00 (2.1)
Non Hispanic White 7.80 (9.7) 1.45 (1.9) 1.70 (2.3) 3.40 (6.7)
Hispanic 7.70 (11.6) 1.60 (2.1) 1.60 (2.4) 2.80 (2.9)*
Education     
Less than high school 7.10 (11.6) 1.20 (2.2) 1.45 (2.3) 2.15 (2.8)
High school or high school equivalent 9.00 (14.0) 1.80 (3.1) 2.00 (2.7) 2.70 (2.7)
College 8.20 (12.0) 1.60 (1.8) 1.60 (2.1) 3.20 (3.6)
Graduate School 7.10 (7.1)* 1.40 (1.9) 1.65 (2.1) 3.00 (2.7)*
Income     
< 25 7.70 (11.5) 1.60 (1.8) 1.60 (2.5) 2.60 (2.9)
25-50K 9.00 (12.5) 1.80 (3.1) 2.15 (2.3) 3.20 (3.3)
> 50 K 7.90 (10.9) 1.40 (2.0) 1.55 (2.1) 3.60 (5.5)*
BMI     
Underweight 7.80 (4.4) 1.54 (1.6) 1.40 (1.3) 2.90 (2.8)
Normal 7.90 (12.2) 1.60 (1.9) 1.60 (2.6) 3.20 (3.9)
Overweight 8.45 (11.7) 1.61 (2.2) 2.05 (2.0) 2.90 (3.3)
Obese 7.60 (10.4) 1.30 (1.5) 1.70 (2.2) 2.15 (1.9)*
Dietary
  Solid Dairy (servings/week)    
< 5 7.30 (10.4) 1.40 (2.0) 1.50 (2.1) 2.30 (2.4)
≥ 5 7.80 (10.9) 1.60 (1.8) 1.60 (2.2) 3.10 (3.5)*
Processed meat (any)     
No 7.00 (6.6) 1.40 (1.6) 1.40 (1.4) 2.35 (2.1)
Yes 8.90 (15.6)* 1.70 (2.9) 2.00 (3.3)** 3.90 (4.7)*
Lifestyle
  Electronics (# of household electronics)    
< 10 7.00 (9.6) 1.40 (1.9) 1.40 (2.0) 2.80 (3.5)
≥ 10 9.40 (11.5)* 1.90 (2.5)** 2.20 (2.6)** 3.20 (4.5)*
Carpet     
No 7.70 (11.2) 1.50 (1.9) 1.60 (2.2) 2.90 (3.5)
Yes 8.55 (11.2) 1.75 (2.1) 1.90 (2.5) 3.30 (3.6)*
Current Employment     
No 7.30 (9.8) 1.50 (2.1) 1.40 (2.3) 2.70 (3.0)
Yes 8.40 (12.5)* 1.63 (1.9) 1.80 (2.3) 3.20 (4.2)*
Parity     
Nulliparous 7.20 (7.2) 1.60 (1.3) 1.50 (2.0) 2.90 (3.7)
  Multiparous 8.10 (12.5) 1.60 (2.4) 1.70 (2.4) 3.00 (3.5)
  1. aSample size for PBDE 153 drops by one subject as the analytical sample failed laboratory QA/QC.
  2. bFor samples with PBDE concentrations < LOD, the value of LOD/sqrt 2 was substituted.
  3. *indicates Kruskal-Wallis significance at p < 0.1, ** indicates Kruskal-Wallis significance at p < 0.05.