Table of Contents

Component Description

Polybrominated diphenyl ethers (PBDEs) and 2,2’,4,4’,5,5’-hexabromobiphenyl (PBB-153) are included in a larger group of chemicals known as brominated flame retardants (BFRs) that are added to products such as foam padding, textiles, or plastics to prevent accidental ignition and fire development. BFRs are not chemically bound to the flame-retarded material, so they can enter the environment from volatilization, leaching, or degradation of BFR-containing products. PBDEs are generally persistent in the environment and have been measured in aquatic sediments, house dust, and aquatic and terrestrial animals. PBDEs have been shown to bio accumulate in fish. Humans may be exposed though the diet, including breast feeding, and by contact with BFR-treated products and contaminated house dust.

Eligible Sample

Examined participants aged 12 years and older from a one-third subsample were eligible.

Description of Laboratory Methodology

Eleven polybrominated diphenyl ethers (PBDEs) and PBB-153 were measured in serum through the use of automated liquid/liquid extraction and subsequent sample clean-up. Final determination of target analytes wasperformed by isotope dilution gas chromatography high-resolution mass spectrometry GC/IDHRMS. The analytical method is described in Jones et al, 2012, which is a modification of the method described by Sjodin et al., 2004.

Refer to the Laboratory Methods Files section for a detailed description of the laboratory methods used.

There were no changes to the lab method, lab equipment, or lab site for this component in the NHANES 2005-2006 cycle. However, the samples were measured in a pooled fashion for 2005-2006 rather than individual measurements.

Laboratory Quality Assurance and Monitoring

Serum samples were processed, stored and shipped to the Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA for analysis. 

Detailed instructions on specimen collection and processing are discussed in the NHANES Laboratory Procedure Manual (LPM). Vials are stored under appropriate frozen (-30oC) conditions until they were shipped to the National Center for Environmental Health for testing. 

The NHANES quality assurance and quality control (QA/QC) protocols meet the 1988 Clinical Laboratory Improvement Act mandates. Detailed QA/QC instructions are discussed in the NHANES LPM.

Mobile Examination Centers (MECs)

Laboratory team performance is monitored using several techniques. NCHS and contract consultants use a structured competency assessment evaluation during visits to evaluate both the quality of the laboratory work and the quality-control procedures. Each laboratory staff member is observed for equipment operation, specimen collection and preparation; testing procedures and constructive feedback are given to each staff member. Formal retraining sessions are conducted annually to ensure that required skill levels were maintained.

Analytical Laboratories

NHANES uses several methods to monitor the quality of the analyses performed by the contract laboratories. In the MEC, these methods include performing blind split samples collected during “dry run” sessions. In addition, contract laboratories randomly perform repeat testing on 2% of all specimens.

NCHS developed and distributed a quality control protocol for all CDC and contract laboratories, which outlined the use of Westgard rules (Westgard, et al. 1981) when running NHANES specimens. Progress reports containing any problems encountered during shipping or receipt of specimens, summary statistics for each control pool, QC graphs, instrument calibration, reagents, and any special considerations are submitted to NCHS quarterly. The reports are reviewed for trends or shifts in the data. The laboratories are required to explain any identified areas of concern.

All QC procedures recommended by the manufacturers were followed. Reported results for all assays meet the Division of Laboratory Sciences’ quality control and quality assurance performance criteria for accuracy and precision, similar to the Westgard rules (Caudill, et al. 2008).

Data Processing and Editing

The data were reviewed. Incomplete data or improbable values were sent to the performing laboratory for confirmation.

Analytic Notes

Refer to the 2005-2006 Laboratory Data Overview for general information on NHANES laboratory data.

Please refer to the NHANES Analytic Guidelines and the on-line NHANES Tutorial for details on the use of sample weights and analytic issues.

Subsample Weights

The original pooled-sample weight created for this file released in July 2013 was not correctly stratified to the U.S population total. This new file contains the corrected sample weight (WTSMSMPA). No changes or corrections were made to the lab analyte data in this new release. Any analyses of the data using the old public use data file should be repeated using the corrected sample weight on this file.

BFR including PBDEs and PBB-153 were measured in a one-third subsample of participants 12 years older.  Special sample weights are required to analyze these data properly. Specific sample weights for this subsample are included in this data file and should be used when analyzing these data. Samples were pooled in groups of 8 samples per pool within 40 demographic groups. The analysis of NHANES 2005-2006 pooled-sample data must be conducted with the basic demographic variables provided in this data file. This pooled-sample data file cannot be linked to other NHANES 2005-2006 data. Because each sample person does not have an equal probability of selection, sample weighting is needed to produce correct population estimates of means, percentiles, and other descriptive statistics.

The pooled-sample weights required to produce estimates from these data are included in this data file.  The analysis of pooled-samples from survey data is a relatively new field of study, and there is currently no established method to produce variance estimates for these pooled results.   These data cannot be analyzed using software designed for complex surveys because design features are not available. 

Demographic and Other Related Variables

The analysis of NHANES laboratory data must be conducted using the appropriate survey design and demographic variables. The NHANES 2005-2006 Demographics File contains demographic data, health indicators, and other related information collected during household interviews as well as the sample design variables. The recommended procedure for variance estimation requires use of stratum and PSU variables (SDMVSTRA and SDMVPSU, respectively) in the demographic data file.

The Fasting Questionnaire File includes auxiliary information, such as fasting status, length of fast and the time of venipuncture.

This laboratory data file can be linked to the other NHANES data files using the unique survey participant identifier (i.e., SEQN).

Rationale and Methods Used to Create Pooled Results

The Centers for Disease Control and Prevention (CDC) provide an ongoing assessment of the US population's exposure to environmental chemicals by using biomonitoring in conjunction with CDC's National Health and Nutrition Examination Survey (NHANES). Characterizing the distributions of concentrations of environmental compounds or their metabolites in the US population is a primary objective of CDC's biomonitoring program. Historically, this characterization has been based on individual measurements of these compounds in body fluid or tissue from representative samples of the population. Pooling samples allows for larger sample volumes, which can result in lower limits of detection and reduces the number of measurements and costs. For the first time in NHANES 2005-2006, a weighted pooled-sample design was implemented to facilitate pooling samples before making analytical measurements (pooled results were not weighted in NHANES 2001-2002). Table 1 lists the IUPAC (International Union of Pure and Applied Chemistry (IUPAC) names, common abbreviation, and NHANES variable name for the analytes included in this data file.

Pools were prepared from serum collected from a random one-third subset of the NHANES 2005–2006 participants aged 12 years and older. Samples were pooled based on gender, race and Hispanic origin, and age. To implement the pooled-sample design, each participant sample was identified as belonging to one of 32 demographic groups based on race and Hispanic origin (non-Hispanic white: NHW, non-Hispanic black: NHB, Mexican American: MA,: not non-Hispanic black, non-Hispanic white or Mexican-American: OTHER), gender (Male, Female), and age group (12-19, 20-39, 40-59, and 60+ years of age and older). Eight (8) samples were included in each pool. The number of pools created for each of the 32 demographic groups varied depending on the total number of individual samples available in a demographic group. The one-third subset of NHANES 2005-2006 represents 2345 individual samples, but because the pooled-sample design requires that all samples be of sufficient volume and that there be the same number of samples in each pool, only 1973 samples were available to create 247 pools with 8 samples per pool.  See more details on pool sample formation and exceptions in Table 2. The variable SAMPLEID denotes the identification number for each pool and ranges from 1 through 247. Please refer to the Pooled-Sample Technical Support file (POOLTF_D) for detailed information on individual participants included in each pool.

In order to incorporate sample weighting into the pooled-sample design it was necessary to use a different volume of material from each sample contributing to a pool. The volume chosen for each sample in a pool was based on the ratio of its sampling weight to the sum of the sampling weights of all samples in the pool. To physically accomplish the pooling in the laboratory required that the ratio of the largest to the smallest sampling weight of samples in the same pool be no larger than about 4 or 5. The individual samples were sorted/stratified by sampling weight within each of the 32 demographic groups and pools were formed using samples with sampling weights adjacent to one another in the sorted list. The number of samples in the one-third subset, the number of samples available, the number of these samples that were usable, and the number of pools formed in each demographic group are presented in Table 2. Once the pools were created, summed sampling weights were further adjusted to account for the unused samples. These adjusted summed sampling weights are represented by the variable named WTSMSMPA.

Detection Limits

In the dataset, the whole weight detection limit (pg/g serum) is a variable and dependent on the available sample size, however, the variation in sample size was low. Three variables are provided for each of these analytes. The variable ending in “LC” (ex., LBDBB1LC) indicates whether the result was below the limit of detection: the value “0” means that the result was at or above the limit of detection, “1” indicates that the result was below the limit of detection.  The other variable prefixed “LA” indicates the lipid adjusted detection limits (ex., LBCBB1LA) in ng/g lipid due to differences of the lipid levels measured in individual pools/specimens. The third variable (ex., LBCBB1) provides the analytic result for that analyte.  For analytes with analytic results below the lower limit of detection (ex., LBDBB1LC =1), an imputed fill value was placed in the analyte results field. This value is the lower limit of detection divided by the square root of 2 (LLOD/sqrt[2]). The lower limit of detection (LLOD in pg/g) for BFRs: 

Table 1. NHANES Variable name, common abbreviation and International Union of Pure and Applied Chemistry (IUPAC) name for each analyte reported. Maximum limit of detection (MLOD) expressed as pg/g serum and ng/g lipid.

Variable

Common

IUPAC Name

Max LOD

 

Name

Abbrev.

pg/g serum

ng/g lipid

LBCBR1

PBDE17

2,2´,4- Tribromodiphenyl ether

1.8

0.4

LBCBR2

PBDE28

2,4,4´-Tribromodiphenyl ether

1.8

0.4

LBCBR3

PBDE47

2,2´,4,4´-Tetrabromodiphenyl ether

1.8

0.4

LBCBR66

PBDE66

2,3´,4´,4-Tetrabromodiphenyl ether

1.8

0.4

LBCBR4

PBDE85

2,2´,3,4,4´-Tentabromodiphenyl ether

1.8

0.4

LBCBR5

PBDE99

2,2´,4,4´,5-Pentabromodiphenyl ether

1.8

0.4

LBCBR6

PBDE100

2,2´,4,4´,6-Pentabromodiphenyl ether

1.8

0.4

LBCBR7

PBDE153

2,2´,4,4´,5,5´-Hexabromodiphenyl ether

1.8

0.4

LBCBR8

PBDE154

2,2´,4,4´,5,6´-Hexabromodiphenyl ether

1.8

0.4

LBCBR9

PBDE183

2,2´,3,4,4´,5´,6-Heptabromodiphenyl ether

1.8

0.4

LBCBR11

PBDE209

Decabromodiphenyl ether

18

4.1

LBCBB1

PBB153

2,2´,4,4´,5,5´-Hexabromobiphenyl

1.8

0.4

 

Table 2.  Number of subjects per demographic group in the NHANES 2005–2006 one-third subsample, number of individual serum samples available, number of usable samples, and number of pools formed from usable samples. 

Table 2. Number of subjects per demographic group in the NHANES 2005–2006 one-third subsample, number of individual serum samples available, number of usable samples, and number of pools formed from usable samples. 

1 Value of this categorical variable in the data set.
2 With only 23 usable samples, two 8 sample pools and one 7 sample pool were created.
3 With only 6 usable samples, one 6 sample pool was created.

Methodological Considerations for analysis

There are a few pooled-sample methodological publications, which address issues related to the following topics (See References.)

• Variance estimation and bias correction when pooling samples from log-normally distributed populations (Caudill, 2010a; Caudill, 2010b; Caudill et al., 2007);
• Models that incorporate measurement error when analyzing pooled-samples from normally or log-normally distributed populations (Caudill, 2010a);
• Incorporation of sample weighting into a pooled-sample design (Caudill, 2012; Caudill, 2010a);
• Estimation of standard errors and confidence limits for point estimates from pooled-samples (Caudill, 2012; Caudill, 2010a). 

References

Codebook and Frequencies

SAMPLEID - Pool identification number

Variable Name:
SAMPLEID
SAS Label:
Pool identification number
English Text:
Pool identification number
Target:
Both males and females 12 YEARS - 150 YEARS

RIAGENDR - Gender

Variable Name:
RIAGENDR
SAS Label:
Gender
English Text:
Gender
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Male 114 114
2 Female 133 247
. Missing 0 247

ETHNICTY - Ethnicity - Recode

Variable Name:
ETHNICTY
SAS Label:
Ethnicity - Recode
English Text:
Ethnicity - Recode
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Non-Hispanic White 104 104
2 Non-Hispanic Black 62 166
3 Mexican American 62 228
4 Other 19 247
. Missing 0 247

RIDAGGRP - Age group

Variable Name:
RIDAGGRP
SAS Label:
Age group
English Text:
Age group
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 12-19 years 78 78
2 20-39 years 66 144
3 40-59 years 52 196
4 60+ years 51 247
. Missing 0 247

RIANSMP - Number of samples in a pool

Variable Name:
RIANSMP
SAS Label:
Number of samples in a pool
English Text:
Number of samples in a pool
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
6 to 8 Range of Values 247 247
. Missing 0 247

WTSMSMPA - Adjust sum sampling weights in same pool

Variable Name:
WTSMSMPA
SAS Label:
Adjust sum sampling weights in same pool
English Text:
Adjust sum sampling weights in same pool
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
59702.062036 to 3228037.3031 Range of Values 247 247
. Missing 0 247

LBCBB1 - 2,2',4,4',5,5'-hexabromobiphenyl (pg/g)

Variable Name:
LBCBB1
SAS Label:
2,2',4,4',5,5'-hexabromobiphenyl (pg/g)
English Text:
2,2',4,4',5,5'-hexabromobiphenyl (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 967.8 Range of Values 247 247
. Missing 0 247

LBCBB1LA - 2,2',4,4',5,5'-hxbrmbiphl lipd adj(ng/g)

Variable Name:
LBCBB1LA
SAS Label:
2,2',4,4',5,5'-hxbrmbiphl lipd adj(ng/g)
English Text:
2,2',4,4',5,5'-hxbrmbiphl lipid adj (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 135 Range of Values 247 247
. Missing 0 247

LBDBB1LC - 2,2',4,4',5,5'-hexabromobiphenyl comnt

Variable Name:
LBDBB1LC
SAS Label:
2,2',4,4',5,5'-hexabromobiphenyl comnt
English Text:
2,2',4,4',5,5'-hexabromobiphenyl comment code
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 214 214
1 Below lower detection limit 33 247
. Missing 0 247

LBCBR1 - 2,2',4-tribromodiphenyl ether (pg/g)

Variable Name:
LBCBR1
SAS Label:
2,2',4-tribromodiphenyl ether (pg/g)
English Text:
2,2',4-tribromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 6 Range of Values 247 247
. Missing 0 247

LBCBR1LA - 2,2',4-tribromodiphl ether lpd adj(ng/g)

Variable Name:
LBCBR1LA
SAS Label:
2,2',4-tribromodiphl ether lpd adj(ng/g)
English Text:
2,2',4-tribromodiphl ether lipid adj (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 1 Range of Values 247 247
. Missing 0 247

LBDBR1LC - 2,2',4-tribromodiphenyl ether comment

Variable Name:
LBDBR1LC
SAS Label:
2,2',4-tribromodiphenyl ether comment
English Text:
2,2',4-tribromodiphenyl ether comment code
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 7 7
1 Below lower detection limit 240 247
. Missing 0 247

LBCBR11 - PBDE 209 (pg/g)

Variable Name:
LBCBR11
SAS Label:
PBDE 209 (pg/g)
English Text:
PBDE 209 (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
17.6 to 189.6 Range of Values 247 247
. Missing 0 247

LBCBR11L - PBDE 209 lipid adj (ng/g)

Variable Name:
LBCBR11L
SAS Label:
PBDE 209 lipid adj (ng/g)
English Text:
PBDE 209 lipid adj (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.9 to 25.2 Range of Values 247 247
. Missing 0 247

LBDBR11C - PBDE 209 comment

Variable Name:
LBDBR11C
SAS Label:
PBDE 209 comment
English Text:
PBDE 209 comment
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 30 30
1 Below lower detection limit 217 247
. Missing 0 247

LBCBR2 - 2,4,4'-tribromodiphenyl ether (pg/g)

Variable Name:
LBCBR2
SAS Label:
2,4,4'-tribromodiphenyl ether (pg/g)
English Text:
2,4,4'-tribromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 62.4 Range of Values 247 247
. Missing 0 247

LBCBR2LA - 2,4,4'-tribrmdphenyl ether lpd adj(ng/g)

Variable Name:
LBCBR2LA
SAS Label:
2,4,4'-tribrmdphenyl ether lpd adj(ng/g)
English Text:
2,4,4'-tribrmdphenyl ether lpd adj (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3 to 8.5 Range of Values 247 247
. Missing 0 247

LBDBR2LC - 2,4,4'-tribromodiphenyl ether comment

Variable Name:
LBDBR2LC
SAS Label:
2,4,4'-tribromodiphenyl ether comment
English Text:
2,4,4'-tribromodiphenyl ether comment
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 244 244
1 Below lower detection limit 3 247
. Missing 0 247

LBCBR3 - 2,2',4,4'-tetrabromodiphenyl ether(pg/g)

Variable Name:
LBCBR3
SAS Label:
2,2',4,4'-tetrabromodiphenyl ether(pg/g)
English Text:
2,2',4,4'-tetrabromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
72.6 to 2193.6 Range of Values 247 247
. Missing 0 247

LBCBR3LA - 2,2',4,4'-tetrmdiphnyl ethr lpd ad(ng/g)

Variable Name:
LBCBR3LA
SAS Label:
2,2',4,4'-tetrmdiphnyl ethr lpd ad(ng/g)
English Text:
2,2',4,4'-tetrmdiphnyl ether lpd adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10 to 298 Range of Values 247 247
. Missing 0 247

LBDBR3LC - 2,2',4,4'-tetrabromphenyl ether comment

Variable Name:
LBDBR3LC
SAS Label:
2,2',4,4'-tetrabromphenyl ether comment
English Text:
2,2',4,4'-tetrabromphenyl ether comment
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 247 247
1 Below lower detection limit 0 247
. Missing 0 247

LBCBR4 - 2,2',3,4,4'-pentbromodiphnyl ether(pg/g)

Variable Name:
LBCBR4
SAS Label:
2,2',3,4,4'-pentbromodiphnyl ether(pg/g)
English Text:
2,2',3,4,4'-pentbromodiphenyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 78.9 Range of Values 247 247
. Missing 0 247

LBCBR4LA - 2,2',3,4,4'-pentabromphnyl lpd adj(ng/g)

Variable Name:
LBCBR4LA
SAS Label:
2,2',3,4,4'-pentabromphnyl lpd adj(ng/g)
English Text:
2,2',3,4,4'-pentabromphnyl lpd adj (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 10.7 Range of Values 247 247
. Missing 0 247

LBDBR4LC - 2,2',3,4,4'-pentabromphenyl ether comt

Variable Name:
LBDBR4LC
SAS Label:
2,2',3,4,4'-pentabromphenyl ether comt
English Text:
2,2',3,4,4'-pentabromphenyl ether comt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 204 204
1 Below lower detection limit 43 247
. Missing 0 247

LBCBR5 - 2,2',4,4',5-pentabromodiphnyl ethr(pg/g)

Variable Name:
LBCBR5
SAS Label:
2,2',4,4',5-pentabromodiphnyl ethr(pg/g)
English Text:
2,2',4,4',5-pentabromodiphnyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12.3 to 491.2 Range of Values 247 247
. Missing 0 247

LBCBR5LA - 2,2',4,4',5-pentabrompheyl lpd adj(ng/g)

Variable Name:
LBCBR5LA
SAS Label:
2,2',4,4',5-pentabrompheyl lpd adj(ng/g)
English Text:
2,2',4,4',5-pentabromphenyl lpid adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.5 to 70.8 Range of Values 247 247
. Missing 0 247

LBDBR5LC - 2,2',4,4',5-pentabromphenyl ether comt

Variable Name:
LBDBR5LC
SAS Label:
2,2',4,4',5-pentabromphenyl ether comt
English Text:
2,2',4,4',5-pentabromodiphenyl ether comment code
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 247 247
1 Below lower detection limit 0 247
. Missing 0 247

LBCBR6 - 2,2',4,4',6-pentabromodiphyl ether(pg/g)

Variable Name:
LBCBR6
SAS Label:
2,2',4,4',6-pentabromodiphyl ether(pg/g)
English Text:
2,2',4,4',6-pentabromodiphyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10.7 to 549.9 Range of Values 247 247
. Missing 0 247

LBCBR6LA - 2,2',4,4',6-pentabromdphyl lpd adj(ng/g)

Variable Name:
LBCBR6LA
SAS Label:
2,2',4,4',6-pentabromdphyl lpd adj(ng/g)
English Text:
2,2',4,4',6-pentabromdphyl lipid adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.6 to 74.8 Range of Values 247 247
. Missing 0 247

LBDBR6LC - 2,2',4,4',6-pentabromdphenyl ether comt

Variable Name:
LBDBR6LC
SAS Label:
2,2',4,4',6-pentabromdphenyl ether comt
English Text:
2,2',4,4',6-pentabromdphenyl ether comt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 247 247
1 Below lower detection limit 0 247
. Missing 0 247

LBCBR66 - 2,3',4,4'-tetrabromodiphenyl ether(pg/g)

Variable Name:
LBCBR66
SAS Label:
2,3',4,4'-tetrabromodiphenyl ether(pg/g)
English Text:
2,3',4,4'-tetrabromodiphenyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 3.2 Range of Values 247 247
. Missing 0 247

LBCBR66L - 2,3',4,4'-tetrabromodiphyl lpd adj(ng/g)

Variable Name:
LBCBR66L
SAS Label:
2,3',4,4'-tetrabromodiphyl lpd adj(ng/g)
English Text:
2,3',4,4'-tetrabromodiphyl lipid adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 0.6 Range of Values 247 247
. Missing 0 247

LBDBR66C - 2,3',4,4'-tetrabromodiphenyl ether comt

Variable Name:
LBDBR66C
SAS Label:
2,3',4,4'-tetrabromodiphenyl ether comt
English Text:
2,3',4,4'-tetrabromodiphenyl ether comt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 6 6
1 Below lower detection limit 241 247
. Missing 0 247

LBCBR7 - 2,2',4,4',5,5'-hxbromodiphnyl ethr(pg/g)

Variable Name:
LBCBR7
SAS Label:
2,2',4,4',5,5'-hxbromodiphnyl ethr(pg/g)
English Text:
2,2',4,4',5,5'-hxbromodiphnyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
13.4 to 445.7 Range of Values 247 247
. Missing 0 247

LBCBR7LA - 2,2',4,4',5,5'-hxbrompheyl lpd adj(ng/g)

Variable Name:
LBCBR7LA
SAS Label:
2,2',4,4',5,5'-hxbrompheyl lpd adj(ng/g)
English Text:
2,2',4,4',5,5'-hxbromphenyl lipid adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.9 to 62 Range of Values 247 247
. Missing 0 247

LBDBR7LC - 2,2',4,4',5,5'-hexabromphenyl ether comt

Variable Name:
LBDBR7LC
SAS Label:
2,2',4,4',5,5'-hexabromphenyl ether comt
English Text:
2,2',4,4',5,5'-hexabromphenyl ether comt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 247 247
1 Below lower detection limit 0 247
. Missing 0 247

LBCBR8 - 2,2',4,4',5,6'hexabromodiphyl ethr(pg/g)

Variable Name:
LBCBR8
SAS Label:
2,2',4,4',5,6'hexabromodiphyl ethr(pg/g)
English Text:
2,2',4,4',5,6'-hexabromodiphyl ether(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 55.4 Range of Values 247 247
. Missing 0 247

LBCBR8LA - 2,2',4,4',5,6'-hxabromphyl lpd adj(ng/g)

Variable Name:
LBCBR8LA
SAS Label:
2,2',4,4',5,6'-hxabromphyl lpd adj(ng/g)
English Text:
2,2',4,4',5,6'-hxabromphenyl lpd adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 7.5 Range of Values 247 247
. Missing 0 247

LBDBR8LC - 2,2',4,4',5,6'-hexabromphenyl ether comt

Variable Name:
LBDBR8LC
SAS Label:
2,2',4,4',5,6'-hexabromphenyl ether comt
English Text:
2,2',4,4',5,6'-hexabromphenyl ether comt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 201 201
1 Below lower detection limit 46 247
. Missing 0 247

LBCBR9 - 2,2',3,4,4',5,6heptbromdiphyl ethr(pg/g)

Variable Name:
LBCBR9
SAS Label:
2,2',3,4,4',5,6heptbromdiphyl ethr(pg/g)
English Text:
2,2',3,4,4',5',6-heptabromodiphyl ethr(pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.8 to 75.7 Range of Values 247 247
. Missing 0 247

LBCBR9LA - 2,2',3,4,4',5',6-heptbrphl lpd adj(ng/g)

Variable Name:
LBCBR9LA
SAS Label:
2,2',3,4,4',5',6-heptbrphl lpd adj(ng/g)
English Text:
2,2',3,4,4',5',6-heptabrophenl lipid adj(ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2 to 15.1 Range of Values 247 247
. Missing 0 247

LBDBR9LC - 2,2',3,4,4',5',6-heptabrophenl ether cmt

Variable Name:
LBDBR9LC
SAS Label:
2,2',3,4,4',5',6-heptabrophenl ether cmt
English Text:
2,2',3,4,4',5',6-heptabrophenl ether cmt
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 78 78
1 Below lower detection limit 169 247
. Missing 0 247