Results

Chemical Group: Polybrominated Diphenyl Ethers (PBDEs)

  • Measured in: Serum

Project: California Teachers Study (CTS)

95% Confidence Interval Selected Percentiles
Chemical measured Indicates exposure to Units Number of people tested Geometric mean Lower Upper 25th 50th 75th 95th Detection frequency Limit of Detection (LOD), wet-weight Notes
BDE 153 BDE 153 ng/g lipid 1980 5.60 5.34 5.85 2.66 4.75 9.48 43.1 77% 0.009 ng/mL

Project: Firefighter Occupational Exposures (FOX) Project

Firefighters fighting flames, wearing full protective suits and holding large hoses spraying water
95% Confidence Interval Selected Percentiles
Chemical measured Indicates exposure to Units Number of people tested Geometric mean Lower Upper 25th 50th 75th 95th Detection frequency Limit of Detection (LOD), wet-weight Notes
BDE 153 BDE 153 ng/g lipid 101 15.4 12.9 18.2 9.01 12.9 21.1 63.1 100% 0.005 ng/mL

Project: Maternal and Infant Environmental Exposure Project (MIEEP)

Pregnant woman seated in front of a laptop computer
95% Confidence Interval Selected Percentiles
Chemical measured Indicates exposure to Units Number of people tested Geometric mean Lower Upper 25th 50th 75th 90th Limit of Detection (LOD), wet-weight Notes
BDE 153 BDE 153 ng/g lipid 77 2.64 2.01 3.47 0.980 1.94 7.66 14.9 0.005 ng/mL

Footnotes

# As of March 2013, PFBuS is no longer measured due to instrumental background interference.
**LOD changed during the time that samples were analyzed for this project.
*Geometric mean was not calculated because the chemical was found in less than 65% of the study group
*Geometric mean was not calculated because the chemical was found in less than 65% of the study group.
^Concentrations were adjusted for specific gravity using a reference value of 1.017 from NHANES 2007-2008.
§Summary statistics were based on 155 urine samples collected from 40 children.
ΔTwo samples were damaged during processing and could not be tested.
†Summary statistics were based on 138 urine samples collected from 38 adults.
‡Summary statistics were based on 150 urine samples collected from 40 adults.
♢Summary statistics were based on 168 urine samples collected from 40 children.
XLS