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 sample were eligible.

Description of Laboratory Methodology

Serum samples from NHANES 2009-2010 were stored frozen before analysis. 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 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 2009-2010 cycle.

Laboratory Method Files

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 lab for confirmation.

Analytic Notes

Refer to the 2009-2010 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 40 demographic groups. The analysis of NHANES 2009-2010 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 2009-2010 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 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. In NHANES 2009-2010, 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 subset of the NHANES 2009-2010 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 40 demographic groups based on race and Hispanic origin (Mexican American: MA, Other Hispanic: OH, non-Hispanic white: NHW, non-Hispanic black: NHB, 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 40 demographic groups varied depending on the total number of individual samples available in a demographic group. The one-third subset of NHANES 2009-2010 represents 2524 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, 2322 samples were available to create 301 pools with 8 samples per pool (Exceptions are in Table 2). The variable SAMPLEID denotes the identification number for each pool and ranges from 1 through 303, excluding the numbers 265 and 266. Please refer to the Pooled-Sample Technical Support file (POOLTF_F) 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 40 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, 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. 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. Maximum limit of detection (MLOD) expressed as pg/serum and ng/g lipid).

Variable Name Common Abbrev. IUPAC Name Max LOD (pg/g serum) Max LOD (ng/g lipid)
LBCBR1 PBDE17 2,2´,4- Tribromodiphenyl ether 2.5 0.59
LBCBR2 PBDE28 2,4,4´-Tribromodiphenyl ether 2.8 0.66
LBCBR3 PBDE47 2,2´,4,4´-Tetrabromodiphenyl ether 2.8 0.64
LBCBR66 PBDE66 2,3´,4´,4-Tetrabromodiphenyl ether 1.9 0.44
LBCBR4 PBDE85 2,2´,3,4,4´-Tentabromodiphenyl ether 1.9 0.44
LBCBR5 PBDE99 2,2´,4,4´,5-Pentabromodiphenyl ether 2.4 0.56
LBCBR6 PBDE100 2,2´,4,4´,6-Pentabromodiphenyl ether 1.9 0.44
LBCBR7 PBDE153 2,2´,4,4´,5,5´-Hexabromodiphenyl ether 2.5 0.6
LBCBR8 PBDE154 2,2´,4,4´,5,6´-Hexabromodiphenyl ether 2.5 0.58
LBCBR9 PBDE183 2,2´,3,4,4´,5´,6-Heptabromodiphenyl ether 2.1 0.49
LBCBR11 PBDE209 Decabromodiphenyl ether 9.2 2.19
LBCBB1 PBB153 2,2´,4,4´,5,5´-Hexabromobiphenyl 3.8 0.92

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 2009-2010 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

(RIDRETH1=1) 1

Male

(RIAGENDR=1) 1

65/61/602

(8)

67/65/64

(8)

70/65/64

(8)

43/40/40

(5)

Female

(RIAGENDR=2)

57/52/523

(7)

80/76/764

(10)

73/72/72

(9)

51/49/48

(6)

Other Hispanics

(RIDRETH1=2)

Male

(RIAGENDR=1)

22/20/205

(3)

35/34/346

(5)

40/39/397

(5)

26/24/24

(3)

Female

(RIAGENDR=2)

22/20/205

(3)

38/33/32

(4)

39/34/348

(5)

38/35/359

(5)

Non-Hispanic White

(RIDRETH1=3)

Male

(RIAGENDR=1)

91/79/7910

(10)

139/135/13511

(17)

146/142/136

(17)

182/175/168

(21)

Female

(RIAGENDR=2)

76/65/6312

(8)

164/151/15013

(19)

149/138/136

(17)

188/178/176

(22)

Non-Hispanic Black

(RIDRETH1=4)

Male

(RIAGENDR=1)

45/43/4314

(6)

56/52/523

(7)

60/54/5415

(7)

72/67/6716

(9)

Female

(RIAGENDR=2)

53/48/48

(6)

63/57/56

(7)

60/53/5317

(7)

58/52/523

(7)

Other Race  including  Multiracial

(RIDRETH1=5)

Male

(RIAGENDR=1)

13/11/1118

(2)

21/19/1819

(3)

18/18/16

(2)

16/15/1520

(2)

Female

(RIAGENDR=2)

18/17/16

(2)

31/30/3021

(4)

23/21/2122

(3)

16/15/1323

(2)

1 Value of this categorical variable in the data set
2 60 Usable samples: seven 8 sample and one 4 sample pool were created
3 52 Usable samples: six 8 sample and one 4 sample pool
4 76 Usable samples: nine 8 sample and one 4 sample pool
5 20 Usable samples: two 8 sample and one 4 sample pool
6 34 Usable samples: three 8 sample and two 5 sample pools
7 39 Usable samples: four 8 sample and one 7 sample pool
8 34 Usable samples: four 8 sample and one 2 sample pool
9 35 Usable samples: four 8 sample and one 3 sample pool
10 79 Usable samples: nine 8 sample and one 7 sample pool
11 135 Usable samples: sixteen 8 sample and one 7 sample pool
12 63 Usable samples: seven 8 sample and one 7 sample pool
13 150 Usable samples: eighteen 8 sample and one 6 sample pool
14 34 Usable samples: five 8 sample and one 3 sample pool
15 54 Usable samples: six 8 sample and one 6 sample pool
16 67 Usable samples: eight 8 sample and one 3 sample pool
17 53 Usable samples: six 8 sample and one 5 sample pool
18 11 Usable samples: one 6 sample and one 5 sample pool
19 18 Usable samples: one 8 sample, one 6 sample, and one 4 sample pool
20 15 Usable samples: one 8 sample and one 7 sample pool
21 30 Usable samples: three 8 sample and one 6 sample pool
22 21 Usable samples: two 8 sample and one 5 sample pool
23 13 usable samples: one 8 sample and one 5 sample pool.

Methodological approaches for analysis

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

  • Variance estimation and bias correction when pooling samples from log-normally distributed populations (Caudill, 2010a; Caudill, 2010b; Caudill et al., 2007; Li et al., 2014);

  • 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

RIDRETH1 - Race/Hispanic Origin

Variable Name:
RIDRETH1
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 61 61
2 Other Hispanic 33 94
3 Non-Hispanic White 131 225
4 Non-Hispanic Black 56 281
5 Other Race, Including Multiracial 20 301
. Missing 0 301

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 84 139
3 40-59 years 80 219
4 60+ years 82 301
. Missing 0 301

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 148 148
2 Female 153 301
. Missing 0 301

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 301 301
. Missing 0 301

WTSMSMPA - Sum of adjusted subsample weights

Variable Name:
WTSMSMPA
SAS Label:
Sum of adjusted subsample weights
English Text:
Sum of adjusted subsample weights
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
49070.542891 to 2980185.9468 Range of Values 301 301
. Missing 0 301

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
1.414 to 375.1 Range of Values 300 300
. Missing 1 301

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
0.2546 to 52.14 Range of Values 300 300
. Missing 1 301

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 38 300
. Missing 1 301

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
0.9192 to 4.473 Range of Values 299 299
. Missing 2 301

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
0.09899 to 0.8604 Range of Values 299 299
. Missing 2 301

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 18 18
1 Below lower detection limit 281 299
. Missing 2 301

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 715.9 Range of Values 300 300
. Missing 1 301

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
0.7071 to 120.1 Range of Values 300 300
. Missing 1 301

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 289 289
1 Below lower detection limit 11 300
. Missing 1 301

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
1.807 to 30.21 Range of Values 300 300
. Missing 1 301

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
0.2551 to 5.206 Range of Values 300 300
. Missing 1 301

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 294 294
1 Below lower detection limit 6 300
. Missing 1 301

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
32.8 to 962.1 Range of Values 301 301
. Missing 0 301

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
4.67 to 184.6 Range of Values 301 301
. Missing 0 301

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 301 301
1 Below lower detection limit 0 301
. Missing 0 301

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
0.7 to 29.81 Range of Values 301 301
. Missing 0 301

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
0.09899 to 5.719 Range of Values 301 301
. Missing 0 301

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 267 267
1 Below lower detection limit 34 301
. Missing 0 301

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
4.097 to 432.4 Range of Values 301 301
. Missing 0 301

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
0.5834 to 82.95 Range of Values 301 301
. Missing 0 301

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 301 301
1 Below lower detection limit 0 301
. Missing 0 301

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
6.192 to 184.8 Range of Values 301 301
. Missing 0 301

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
0.8979 to 30.42 Range of Values 301 301
. Missing 0 301

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 301 301
1 Below lower detection limit 0 301
. Missing 0 301

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
0.693 to 9.638 Range of Values 301 301
. Missing 0 301

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
0.08485 to 1.849 Range of Values 301 301
. Missing 0 301

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 148 148
1 Below lower detection limit 153 301
. Missing 0 301

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
12.87 to 493.8 Range of Values 301 301
. Missing 0 301

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
1.832 to 74.84 Range of Values 301 301
. Missing 0 301

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 301 301
1 Below lower detection limit 0 301
. Missing 0 301

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
0.9192 to 28.66 Range of Values 299 299
. Missing 2 301

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
0.1131 to 5.498 Range of Values 299 299
. Missing 2 301

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 240 240
1 Below lower detection limit 59 299
. Missing 2 301

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
0.7778 to 9.862 Range of Values 301 301
. Missing 0 301

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
0.09192 to 1.386 Range of Values 301 301
. Missing 0 301

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 179 179
1 Below lower detection limit 122 301
. Missing 0 301