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 through diet, including breastfeeding, and by contact with BFR-treated products and contaminated house dust.

Eligible Sample

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

Description of Laboratory Methodology

Serum samples from NHANES 2013-2014 were stored frozen before analysis. Eleven polybrominated diphenyl ethers (PBDEs) and PBB-153 were measured in serum using automated liquid/liquid extraction and subsequent sample clean-up. Final determination of target analytes was performed 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 Method Files 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 2013-2014 cycle.

Laboratory Method Files

Polybrominated diphenyl ethers (PBDEs) (May 2018)

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 Procedures Manual (LPM). Vials are stored under appropriate frozen (-30oC) conditions until they are 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 Environmental Health 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 2013-2014 Laboratory Data Overview for general information on NHANES laboratory data.

Subsample Weights

BFRs including PBDEs and PBB-153 were measured in a one-third subsample of participants 12 years and 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 48 demographic groups. The analysis of NHANES 2013-2014 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 2013-2014 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 design effect adjusted variance estimates for these pooled results. These data cannot be analyzed using software designed for complex surveys because design features are not available. 

Rationale and Methods Used to Create Pooled Results

The Centers for Disease Control and Prevention (CDC) provides an ongoing assessment of the U.S. 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 U.S. 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. In NHANES 2013-2014, a weighted pooled-sample design was implemented to facilitate pooling samples before making analytical measurements. Table 1 lists the 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 subsample of the NHANES 2013-2014 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 48 demographic groups based on race and Hispanic origin (Mexican American: MA, Other Hispanic: OH, non-Hispanic white: NHW, non-Hispanic black: NHB, non-Hispanic Asian: NHA, Other race including multiracial: 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 48 demographic groups varied depending on the total number of individual samples available in a demographic group. The one-third subsample of NHANES 2013-2014 represents 2,318 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, 2,179 samples were available to create 284 pools with 8 samples per pool. For NHANES 2013-2014, due to limited sample size, no pooled sample was formed for males 60 years and older in the “OTHER” race/Hispanic origin group. Data user needs to be cautious when making national inference including this population subgroup. 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 284. Please refer to the Pooled-Sample Technical Support file (POOLTF_H) 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 10. The individual samples were sorted/stratified by sampling weight within each of the 48 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 subsample, 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 WTBSMSMA.

Demographic and Other Related Variables

The analysis of NHANES laboratory data must be conducted using the appropriate survey design and demographic variables. The NHANES 2013-2014 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).

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. Lipid adjusted detection limits are variable (ng/g lipid) due to differences of the lipid levels measured in individual pools/specimens. In cases where the result was below the limit of detection, the value for that variable is the detection limit divided by the square root of 2.

Table 1. NHANES Variable name, common abbreviation and International Union of Pure and Applied Chemistry (IUPAC) name for each analyte reported.*

Variable

Common

IUPAC Name

Max LOD

Name

Abbrev.

(pg/g serum)

(ng/g lipid)

LBCBR1

PBDE17

2,2´,4- Tribromodiphenyl ether

1.0

0.26

LBCBR2

PBDE28

2,4,4´-Tribromodiphenyl ether

1.0

0.26

LBCBR3

PBDE47

2,2´,4,4´-Tetrabromodiphenyl ether

3.9

1.0

LBCBR66

PBDE66

2,3´,4´,4-Tetrabromodiphenyl ether

2.9

0.73

LBCBR4

PBDE85

2,2´,3,4,4´-Tentabromodiphenyl ether

1.0

0.26

LBCBR5

PBDE99

2,2´,4,4´,5-Pentabromodiphenyl ether

1.7

0.44

LBCBR6

PBDE100

2,2´,4,4´,6-Pentabromodiphenyl ether

1.0

0.26

LBCBR7

PBDE153

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

1.0

0.26

LBCBR8

PBDE154

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

1.0

0.26

LBCBR9

PBDE183

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

1.0

0.26

LBCBR11

PBDE209

Decabromodiphenyl ether

5.0

1.3

LBCBB1

PBB153

2,2´,4,4´,5,5´-Hexabromobiphenyl

0.7

0.18

            *Maximum limit of detection (MLOD) expressed as pg/serum and ng/g lipid).*

 

 

Table 2. Number of subjects in the one-third subsample,number of individual serum samples available, number of usable samples, and number of pools formed from NHANES 2013-2014 participants per demographic group

 

Race/Ethnicity

Gender

Number of subjects in the one-third subsample/

Number of Samples Available/Number of Usable Samples

(Number of Pools)

12–19 years

(RIDAGEYR=1)1

20–39 years

(RIDAGEYR=2)

40–59 years

(RIDAGEYR=3)

60+ years

(RIDAGEYR=4)

Mexican

American

(RIDRETH3=1) 1

Male

(RIAGENDR=1) 1

56/51/502

(7)

40/39/393

(5)

42/41/40

(5)

34/34/32

(4)

Female

(RIAGENDR=2)

54/50/504

(7)

39/38/385

(5)

43/43/436

(6)

42/38/385

(5)

Other Hispanics

(RIDRETH3=2)

Male

(RIAGENDR=1)

21/19/197

(3)

19/19/197

(3)

28/28/288

(4)

24/23/239

(3)

Female

(RIAGENDR=2)

22/22/2210

(3)

30/29/2911

(4)

33/32/32

(4)

34/33/32

(4)

Non-Hispanic White

(RIDRETH3=3)

Male

(RIAGENDR=1)

67/63/6312

(8)

117/112/11113

(14)

111/106/10414

(14)

132/130/13015

(17)

Female

(RIAGENDR=2)

56/49/48

(6)

122/121/120

(15)

131/125/12516

(16)

165/160/15817

(20)

Non-Hispanic Black

(RIDRETH3=4)

Male

(RIAGENDR=1)

61/48/48

(6)

65/57/56

(7)

57/53/5318

(7)

74/67/6719

(9)

Female

(RIAGENDR=2)

57/47/4520

(6)

69/64/64

(8)

66/62/6221

(8)

65/61/6022

(8)

Non-Hispanic Asian

    (RIDRETH3=6)

Male

(RIAGENDR=1)

23/18/1823

(3)

32/30/3024

(4)

34/31/3125

(4)

27/25/24

(3)

Female

(RIAGENDR=2)

29/19/197

(3)

40/39/393

(6)

53/52/5226

(7)

23/23/239

(3)

Other Race  including  Multiracial

(RIDRETH3=7)

Male

(RIAGENDR=1)

9/9/8

(1)

18/17/16

(2)

12/11/1127

(2)

2/2/028

(0)

Female

(RIAGENDR=2)

12/11/1129

(2)

16/16/16

(2)

9/9/8

(1)

3/3/330

(1)

1 Value of this categorical variable in the data set; 2 50 Usable samples: five 8 sample, one 7 sample and one 3 sample pool were created; 3 39 Usable: four 8 sample and one 7 sample pool; 4 50 Usable: six 8 sample and one 2 sample pool; 5 38 Usable: four 8 sample and one 6 sample pools; 6 43 Usable: five 8 sample and one 3 sample pool; 7 19 Usable: two 8 sample and one 3 sample pool; 8 28 Usable: three 8 sample and one 4 sample pool; 9 23 Usable: two 8 sample and one 7 sample pool; 10 22 Usable: two 8 sample and one 6 sample pool; 11 29 Usable: three 8 sample and one 5 sample pool; 12 63 Usable: seven 8 sample and one 7 sample pool; 13 111 Usable: thirteen 8 sample and one 7sample pool; 14 104 Usable: eleven 8 sample, two 7 sample and one 2 sample pool; 15 130 Usable: fifteen 8 sample, one 7 sample and one 3 sample pool; 16 125 Usable: fifteen 8 sample and one 5 sample pool; 17 158 Usable: nineteen 8 sample and one 6 sample pool; 18 53 Usable: six 8 sample and one 5 sample pool; 19 67 Usable: eight 8 sample and one 3 sample pool; 20 45 Usable: five 8 sample and one 5 sample pool; 21 62 Usable: seven 8 sample and one 6 sample pool; 22 60 Usable: seven 8 sample and one 4 sample pool; 23 18 Usable: two 8 sample and one 2 sample pool; 24 30 Usable: three 8 sample and one 6 sample pool; 25 31 Usable: three 8 sample and one 7 sample pool; 26 52 Usable: six 8 sample and one 4 sample pool; 27 11 Usable: one 7 sample and one 4 sample pool; 28 0 Usable: no pool formed; 29 11 Usable: one 8 sample and one 3 sample pool; 30 3 Usable: one 3 sample pool.

 

   

Methodological approaches for analysis

There are a few pooled-sample methodological publications, which address approaches related to the following topics:

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
Code or Value Value Description Count Cumulative Skip to Item
1 to 284 Range of Values 284 284
. Missing 0 284

RIDRETH3 - Race/Hispanic Origin

Variable Name:
RIDRETH3
SAS Label:
Race/Hispanic Origin
English Text:
Recode of reported race and Hispanic origin information
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Mexican American 44 44
2 Other Hispanic 28 72
3 Non-Hispanic White 110 182
4 Non-Hispanic Black 59 241
6 Non-Hispanic Asian 32 273
7 Other Race, Including Multiracial 11 284
. Missing 0 284

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 55 55
2 20-39 years 74 129
3 40-59 years 78 207
4 60+ years 77 284
. Missing 0 284

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 135 135
2 Female 149 284
. Missing 0 284

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
2 to 8 Range of Values 284 284
. Missing 0 284

WTBSMSMA - Sum of adjusted subsample B weights

Variable Name:
WTBSMSMA
SAS Label:
Sum of adjusted subsample B weights
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
63628.672969 to 3656105.4719 Range of Values 284 284
. Missing 0 284

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
0.7071 to 714.2 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBB1LA
SAS Label:
2,2',4,4',5,5'-hxbrmbiphl lpd adj (ng/g)
English Text:
2,2',4,4',5,5'-Hexabromobiphenyl Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.1344 to 129.2 Range of Values 284 284
. Missing 0 284

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 262 262
1 Below lower detection limit 22 284
. Missing 0 284

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
0.7071 to 11.74 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR1LA
SAS Label:
2,2',4-tribrmobiphl ether lpd adj (ng/g)
English Text:
2,2',4-Tribromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.08485 to 1.761 Range of Values 284 284
. Missing 0 284

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 33 33
1 Below lower detection limit 251 284
. Missing 0 284

LBCBR11 - Decabromodiphenyl ether (pg/g)

Variable Name:
LBCBR11
SAS Label:
Decabromodiphenyl ether (pg/g)
English Text:
Decabromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3.536 to 91.93 Range of Values 282 282
. Missing 2 284

LBCBR11L - Decabromodiphenyl ether lipid adj (ng/g)

Variable Name:
LBCBR11L
SAS Label:
Decabromodiphenyl ether lipid adj (ng/g)
English Text:
Decabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.6293 to 20.93 Range of Values 282 282
. Missing 2 284

LBDBR11C - Decabromodiphenyl ether comment

Variable Name:
LBDBR11C
SAS Label:
Decabromodiphenyl ether comment
English Text:
Decabromodiphenyl 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 278 278
1 Below lower detection limit 4 282
. Missing 2 284

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
1.252 to 51.42 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR2LA
SAS Label:
2,4,4'-tribrmdphenyl ethr lpd adj (ng/g)
English Text:
2,4,4'-Tribromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2622 to 9.792 Range of Values 284 284
. Missing 0 284

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 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 284 284
1 Below lower detection limit 0 284
. Missing 0 284

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

Variable Name:
LBCBR3
SAS Label:
2,2',4,4'-tetrabromodiphenyl ethr (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
18.37 to 1218 Range of Values 284 284
. Missing 0 284

LBCBR3LA - 2,2',4,4'-tebrmdphnyl ethr lpd adj(ng/g)

Variable Name:
LBCBR3LA
SAS Label:
2,2',4,4'-tebrmdphnyl ethr lpd adj(ng/g)
English Text:
2,2',4,4'-Tetrabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3.848 to 231.9 Range of Values 284 284
. Missing 0 284

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 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 284 284
1 Below lower detection limit 0 284
. Missing 0 284

LBCBR4 - 2,2',3,4,4'-pentbromodiphenyl ethr(pg/g)

Variable Name:
LBCBR4
SAS Label:
2,2',3,4,4'-pentbromodiphenyl ethr(pg/g)
English Text:
2,2',3,4,4'-Pentabromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.7071 to 24.5 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR4LA
SAS Label:
2,2',3,4,4'-pntabromphnyl lpd adj (ng/g)
English Text:
2,2',3,4,4'-Pentabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.1061 to 4.307 Range of Values 284 284
. Missing 0 284

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 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 249 249
1 Below lower detection limit 35 284
. Missing 0 284

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
3.904 to 266.9 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR5LA
SAS Label:
2,2',4,4',5-pntabromphenyl lpd adj(ng/g)
English Text:
2,2',4,4',5-Pentabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.7439 to 47.39 Range of Values 284 284
. Missing 0 284

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 284 284
1 Below lower detection limit 0 284
. Missing 0 284

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
3.173 to 176.9 Range of Values 284 284
. Missing 0 284

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-Pentabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.6646 to 29.54 Range of Values 284 284
. Missing 0 284

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-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 284 284
1 Below lower detection limit 0 284
. Missing 0 284

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
1.98 to 9.929 Range of Values 284 284
. Missing 0 284

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'-Tetrabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2546 to 1.885 Range of Values 284 284
. Missing 0 284

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 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 35 35
1 Below lower detection limit 249 284
. Missing 0 284

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
10.76 to 502.1 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR7LA
SAS Label:
2,2',4,4',5,5'-hxbrmphenyl lpd adj(ng/g)
English Text:
2,2',4,4',5,5'-Hexabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2.067 to 90.9 Range of Values 284 284
. Missing 0 284

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'-Hexabromodiphenyl 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 284 284
1 Below lower detection limit 0 284
. Missing 0 284

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

Variable Name:
LBCBR8
SAS Label:
2,2',4,4',5,6'-hxabromodiphyl ethr(pg/g)
English Text:
2,2',4,4',5,6'-Hexabromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.7071 to 22.73 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR8LA
SAS Label:
2,2',4,4',5,6'-hxbrmphenyl lpd adj(ng/g)
English Text:
2,2',4,4',5,6'-Hexabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.1061 to 3.409 Range of Values 284 284
. Missing 0 284

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'-Hexabromodiphenyl 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 37 284
. Missing 0 284

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

Variable Name:
LBCBR9
SAS Label:
2,2',3,4,4',5',6-hptbrodiphyl ethr(pg/g)
English Text:
2,2',3,4,4',5',6-Heptabromodiphenyl ether (pg/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.7071 to 84.4 Range of Values 284 284
. Missing 0 284

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

Variable Name:
LBCBR9LA
SAS Label:
2,2',3,4,4',5',6-hptbrphnl lpd adj(ng/g)
English Text:
2,2',3,4,4',5',6-Heptabromodiphenyl ether Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.08485 to 13.94 Range of Values 284 284
. Missing 0 284

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-Heptabromodiphenyl 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 154 154
1 Below lower detection limit 130 284
. Missing 0 284