Table of Contents

Locator Record

Title: Non-dioxin-like Polychlorinated Biphenyls (L28NPB_C )
Contact Number: 1-866-441-NCHS
Years of Content: 2003 - 2004
First Published: April, 2008
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Non-dioxin-like Polychlorinated Biphenyls
Record Source: NHANES 2003 - 2004
Survey Methodology: NHANES 2003 - 2004 is a stratified multistage probability sample of the civilian non-institutionalized population of the U.S.
Medium: NHANES Web site; SAS transport files

Component Description

Polychlorinated biphenyls (PCBs) are a class of chlorinated aromatic hydrocarbon chemicals that once were used as heat-exchanger, transformer, and hydraulic fluids, and as additives to paints, oils, joint caulking, and floor tiles. The different types of PCB chemicals are known as congeners, which are compounds that are distinguished by the number of chlorine atoms and their location on the biphenyl structure. Peak production occurred in the early 1970s, and production was banned in the United States after 1979. More than 1.5 billion pounds of PCBs were manufactured in the United States prior to 1977. Continued concern about these chemicals is because of their persistence in the environment and accumulation in wildlife and the animal food chain. PCBs enter the food chain by a variety of routes, including migration into food from external sources, contamination of animal feeds, and accumulation in the fatty tissues of animals. PCBs are found at higher concentrations in fatty foods (e.g., dairy products and fish) and food is the main source of exposure for the general population. The transfer of PCBs from mother to infant via breast milk is another important source of exposure. Exposure to these chemicals nearly always occurs as mixtures rather than as individual PCBs.

Eligible Sample

Participants aged 12 years and older who met the subsample requirements.

Description of Laboratory Methodology

Serum specimens (1–1.5 mL) to be analyzed for PCBs and persistent pesticides are spiked with 13C12-labeled internal standards and the analytes of interest are isolated in hexane using a C18 solid phase extraction (SPE) procedure followed by extraction through neutral silica and Florosil SPE columns. PCBs and pesticides are eluted from the Florosil column with hexane and 1:1 dichloromethane /hexane. For PCBs and pesticides, each analytical run consists of nine unknown specimens, one method blank, and two quality control samples. Beforequantification, the vials are reconstituted with 10μL 13C-labeled external standard. Sample extracts are then analyzed simultaneously for PCBs and pesticides by HRGC/ID-HRMS where 1 μL is injected, using a GC Pal (Leap Technology) auto sampler, into a Hewlett-Packard 6890 gas chromatograph operated in the splitless injection mode with a flow of 1 mL/min helium through a DB-5ms capillary column (30 m x0.25 mm x0.25 μm film thickness) where analytes are separated prior to entering a Thermo Finnigan MAT95 XP (5 kV) magnetic sector mass spectrometer operated in EI mode at 40 eV, using selected ion monitoring (SIM) at 10,000 resolving power (10% valley). Two ion current responsescorresponding to two masses are monitored for each native (12C) compound and it corresponding 13C-internal standard. The instrumental response factor for each analyte is calculated as the sum of the two 12C-isomers divided by the sum of two 13C-isomers.

Calibration of mass spectrometer response factor vs. concentration is performed using calibration standards containing known concentrations of each 12C compound and its corresponding 13C internal standard. The concentration of each analyte is derived by interpolation from individual linear calibration curves and is adjusted for sample weight. The validity of all mass spectrometry data are evaluated using a variety of established criteria, such as signal-to-noise ratio ≥ 3 for the smallest native ion mass, instrument resolving power ≥ 10,000, chromatographic isomer specificity index with 95% limits, relative retention time ratio of native to isotopically labeled analyte within 3 parts-per-thousand compared to a standard, response ratios of the two 12C and 13C ions must be within ± 20 % of their theoretical values and analyte recovery ≥10 % and ≤ 120%. In addition, the calculated mean and range of each analyte in the quality control sample must be within their respectiveconfidence intervals. The method detection limit (MDL) for each analyteis calculated correcting for sample weight and recovery. The total lipidcontent of each specimen is estimated from its total cholesterol and triglycerides values using a “summation” method. Analytical results for PCBs and pesticides are reported on a whole-weight [ng/g or parts-per-billion (ppb)] and lipid-adjusted basis [ng/g or ppb]. International toxicity equivalents (I-TEQs) are also reported for PCDDs, PCDFs, cPCBs andother “dioxin-like” PCBs, based on the WHO-TEF system. Prior to reporting results, all quality control (QC) data undergo a final review bya Division of Laboratory Science quality control officer.

Laboratory Quality Assurance and Monitoring

Serum specimens are processed, stored, and shipped to the Division ofLaboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention for analysis.

Detailed specimen collection and processing instructions are discussed in the NHANES Laboratory/Medical Technologists Procedures Manual (LPM). Vials are stored under appropriate frozen (–20°C) conditions until they are shipped to National Center for Environmental Health for testing.

Mobile Examination Centers (MECs)

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

The NHANES QA/QC protocols meet the 1988 Clinical Laboratory Improvement Act mandates. Detailed QA/QC instructions are discussed in the NHANES LPM.

Analytical Laboratories

NHANES uses several methods to monitor the quality of the analyses performed by the laboratories. In the MEC, these methods include performing blind split samples collected on “dry run” sessions. In addition, contract laboratories randomly perform repeat testing on 2.0%of all specimens.

NCEH developed and distributed a quality control protocolfor all the laboratories which outlined the Westgard rules used when running NHANES specimens. Any problems encountered during shipping or receipt of specimens, instrument calibration, reagents, and any special considerations are submitted to NCHS and Westat. Summary statistics for each control pool, QC graphs, are reviewed by NCHS for trends or shifts in the data. The laboratories are required to explain any identifiedareas 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 specifications outlined by Westgard(1981).

Laboratory Quality Assurance and Monitoring

Serum specimens are processed, stored, and shipped to the Division ofLaboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention for analysis.

Detailed specimen collection and processing instructions are discussed in the NHANES Laboratory/Medical Technologists Procedures Manual (LPM). Vials are stored under appropriate frozen (–20°C) conditions until they are shipped to National Center for Environmental Health for testing.

Mobile Examination Centers (MECs)

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

The NHANES QA/QC protocols meet the 1988 Clinical Laboratory Improvement Act mandates. Detailed QA/QC instructions are discussed in the NHANES LPM.

Analytical Laboratories

NHANES uses several methods to monitor the quality of the analyses performed by the laboratories. In the MEC, these methods include performing blind split samples collected on “dry run” sessions. In addition, contract laboratories randomly perform repeat testing on 2.0% of all specimens.

NCEH developed and distributed a quality control protocolfor all the laboratories which outlined the Westgard rules used when running NHANES specimens. Any problems encountered during shipping or receipt of specimens, instrument calibration, reagents, and any special considerations are submitted to NCHS and Westat. Summary statistics for each control pool, QC graphs, are reviewed by NCHS 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 specifications outlined by Westgard(1981).

Analytic Notes

Measures of polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), non-ortho substituted or coplanar polychlorinated biphenyls (cPCBs) are assessed in participants aged 12 years and older on a one-third subsample.

Use the special weights included in this data file when analyzing data. Read the “Special Sample Weights for this Dataset”information provided before beginning analysis.

Subsample weights

Measures ofpolychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), non-ortho substituted or coplanar polychlorinated biphenyls (cPCBs) were measured in a one third subsample of persons 12 years and over. 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.

Variance estimation

The analysis of NHANES 2003-2004 laboratory data must be conducted with the key survey design and basic demographic variables. The NHANES 2003-2004 Demographic Data File contains demographic and 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.

Links to NHANES Data Files

This laboratory data file can be linked to the other NHANES 2003-2004data files using the unique survey participant identifier SEQN.

Detection Limits

The detection limits were variable for all of the analytes except for PCB 052(LBX052), PCB099(LBX099), PCB138(LBX138), and PCB153(LBX153), . The variable named LBD___LC indicates whetherthe result was below the limit of detection. There are two values: “0” and “1”. “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 named LBX___ provides the analytic result for thatanalyte.

The detection limit divided by the square root of 2 is the value that is provided for results that are below the limit of detection.

Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues.

Analytic Notes

Subsample weights

Measures of non-dioxin polychlorinated biphenyls were measured in a one third subsample of persons 12 years and over. Special sample weights are required to analyze these data properly. Specific sample weights for this subsample are included in this data file and should beused when analyzing these data.

Variance estimation

The analysis of NHANES 2003-2004 laboratory data must be conducted with the key survey design and basic demographic variables. The NHANES 2003-2004 Demographic Data File contains demographic and 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.

Links to NHANES Data Files

This laboratory data file can be linked to the other NHANES 2003-2004data files using the unique survey participant identifier SEQN.

Detection Limits

The detection limits were variable for all of the analytes except for PCB 052(LBX052), PCB099(LBX099), PCB138(LBX138), and PCB153(LBX153), . The variable named LBD___LC indicates whetherthe result was below the limit of detection. There are two values: “0” and “1”. “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 named LBX___ provides the analytic result for that analyte.

The detection limit divided by the square root of 2 is the value that is provided for results that are below the limit of detection.

Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues.

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 12 YEARS - 150 YEARS

WTSC2YR - Two-year MEC weights of subsample C

Variable Name:
WTSC2YR
SAS Label:
Two-year MEC weights of subsample C
English Text:
Two-year MEC weights of subsample C
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 456851.11941 Range of Values 2285 2285
. Missing 0 2285

LBX044 - PCB44 (ng/g)

Variable Name:
LBX044
SAS Label:
PCB44 (ng/g)
English Text:
PCB44 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.4912 Range of Values 1890 1890
. Missing 395 2285

LBX044LA - PCB44 Lipid Adj (ng/g)

Variable Name:
LBX044LA
SAS Label:
PCB44 Lipid Adj (ng/g)
English Text:
PCB44 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.08 to 85.4 Range of Values 1890 1890
. Missing 395 2285

LBD044LC - PCB44 Comment Code

Variable Name:
LBD044LC
SAS Label:
PCB44 Comment Code
English Text:
PCB44 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 1887 1887
1 Below lower detection limit 3 1890
. Missing 395 2285

LBX049 - PCB49 (ng/g)

Variable Name:
LBX049
SAS Label:
PCB49 (ng/g)
English Text:
PCB49 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.3136 Range of Values 1876 1876
. Missing 409 2285

LBX049LA - PCB49 Lipid Adj (ng/g)

Variable Name:
LBX049LA
SAS Label:
PCB49 Lipid Adj (ng/g)
English Text:
PCB49 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 54.5 Range of Values 1876 1876
. Missing 409 2285

LBD049LC - PCB49 Comment Code

Variable Name:
LBD049LC
SAS Label:
PCB49 Comment Code
English Text:
PCB49 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 1864 1864
1 Below lower detection limit 12 1876
. Missing 409 2285

LBX052 - PCB52 (ng/g)

Variable Name:
LBX052
SAS Label:
PCB52 (ng/g)
English Text:
PCB52 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0025 to 0.7638 Range of Values 1897 1897
. Missing 388 2285

LBX052LA - PCB52 Lipid Adj (ng/g)

Variable Name:
LBX052LA
SAS Label:
PCB52 Lipid Adj (ng/g)
English Text:
PCB52 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.38 to 133 Range of Values 1897 1897
. Missing 388 2285

LBD052LC - PCB52 Comment Code

Variable Name:
LBD052LC
SAS Label:
PCB52 Comment Code
English Text:
PCB52 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 1897 1897
1 Below lower detection limit 0 1897
. Missing 388 2285

LBX087 - PCB87 (ng/g)

Variable Name:
LBX087
SAS Label:
PCB87 (ng/g)
English Text:
PCB87 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.2245 Range of Values 1892 1892
. Missing 393 2285

LBX087LA - PCB87 Lipid Adj (ng/g)

Variable Name:
LBX087LA
SAS Label:
PCB87 Lipid Adj (ng/g)
English Text:
PCB87 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.02 to 39 Range of Values 1892 1892
. Missing 393 2285

LBD087LC - PCB87 Comment Code

Variable Name:
LBD087LC
SAS Label:
PCB87 Comment Code
English Text:
PCB87 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 1577 1577
1 Below lower detection limit 315 1892
. Missing 393 2285

LBX099 - PCB99 (ng/g)

Variable Name:
LBX099
SAS Label:
PCB99 (ng/g)
English Text:
PCB99 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0006 to 2.3149 Range of Values 1877 1877
. Missing 408 2285

LBX099LA - PCB99 Lipid Adj (ng/g)

Variable Name:
LBX099LA
SAS Label:
PCB99 Lipid Adj (ng/g)
English Text:
PCB99 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.1 to 304 Range of Values 1877 1877
. Missing 408 2285

LBD099LC - PCB99 Comment Code

Variable Name:
LBD099LC
SAS Label:
PCB99 Comment Code
English Text:
PCB99 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 1876 1876
1 Below lower detection limit 1 1877
. Missing 408 2285

LBX101 - PCB101 (ng/g)

Variable Name:
LBX101
SAS Label:
PCB101 (ng/g)
English Text:
PCB101 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0009 to 0.4564 Range of Values 1897 1897
. Missing 388 2285

LBX101LA - PCB101 Lipid Adj (ng/g)

Variable Name:
LBX101LA
SAS Label:
PCB101 Lipid Adj (ng/g)
English Text:
PCB101 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.09 to 79.3 Range of Values 1897 1897
. Missing 388 2285

LBD101LC - PCB101 Comment Code

Variable Name:
LBD101LC
SAS Label:
PCB101 Comment Code
English Text:
PCB101 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 1843 1843
1 Below lower detection limit 54 1897
. Missing 388 2285

LBX110 - PCB110 (ng/g)

Variable Name:
LBX110
SAS Label:
PCB110 (ng/g)
English Text:
PCB110 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0009 to 0.3408 Range of Values 1882 1882
. Missing 403 2285

LBX110LA - PCB110 Lipid Adj (ng/g)

Variable Name:
LBX110LA
SAS Label:
PCB110 Lipid Adj (ng/g)
English Text:
PCB110 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.08 to 59.2 Range of Values 1882 1882
. Missing 403 2285

LBD110LC - PCB110 Comment Code

Variable Name:
LBD110LC
SAS Label:
PCB110 Comment Code
English Text:
PCB110 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 1852 1852
1 Below lower detection limit 30 1882
. Missing 403 2285

LBX128 - PCB128 (ng/g)

Variable Name:
LBX128
SAS Label:
PCB128 (ng/g)
English Text:
PCB128 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.0631 Range of Values 1877 1877
. Missing 408 2285

LBX128LA - PCB128 Lipid Adj (ng/g)

Variable Name:
LBX128LA
SAS Label:
PCB128 Lipid Adj (ng/g)
English Text:
PCB128 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 9.2 Range of Values 1877 1877
. Missing 408 2285

LBD128LC - PCB128 Comment Code

Variable Name:
LBD128LC
SAS Label:
PCB128 Comment Code
English Text:
PCB128 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 470 470
1 Below lower detection limit 1407 1877
. Missing 408 2285

LBX138 - PCB138 & 158 (ng/g)

Variable Name:
LBX138
SAS Label:
PCB138 & 158 (ng/g)
English Text:
PCB138 & 158 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0055 to 5.1055 Range of Values 1896 1896
. Missing 389 2285

LBX138LA - PCB138 & 158 Lipid Adj (ng/g)

Variable Name:
LBX138LA
SAS Label:
PCB138 & 158 Lipid Adj (ng/g)
English Text:
PCB138 & 158 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.1 to 773 Range of Values 1896 1896
. Missing 389 2285

LBD138LC - PCB138 & 158 Comment Code

Variable Name:
LBD138LC
SAS Label:
PCB138 & 158 Comment Code
English Text:
PCB138 & 158 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 1896 1896
1 Below lower detection limit 0 1896
. Missing 389 2285

LBX146 - PCB146 (ng/g)

Variable Name:
LBX146
SAS Label:
PCB146 (ng/g)
English Text:
PCB146 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.6574 Range of Values 1894 1894
. Missing 391 2285

LBX146LA - PCB146 Lipid Adj (ng/g)

Variable Name:
LBX146LA
SAS Label:
PCB146 Lipid Adj (ng/g)
English Text:
PCB146 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 86.75 Range of Values 1894 1894
. Missing 391 2285

LBD146LC - PCB146 Comment Code

Variable Name:
LBD146LC
SAS Label:
PCB146 Comment Code
English Text:
PCB146 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 1864 1864
1 Below lower detection limit 30 1894
. Missing 391 2285

LBX149 - PCB149 (ng/g)

Variable Name:
LBX149
SAS Label:
PCB149 (ng/g)
English Text:
PCB149 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.1377 Range of Values 1873 1873
. Missing 412 2285

LBX149LA - PCB149 Lipid Adj (ng/g)

Variable Name:
LBX149LA
SAS Label:
PCB149 Lipid Adj (ng/g)
English Text:
PCB149 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 23.9 Range of Values 1873 1873
. Missing 412 2285

LBD149LC - PCB149 Comment Code

Variable Name:
LBD149LC
SAS Label:
PCB149 Comment Code
English Text:
PCB149 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 1790 1790
1 Below lower detection limit 83 1873
. Missing 412 2285

LBX151 - PCB151 (ng/g)

Variable Name:
LBX151
SAS Label:
PCB151 (ng/g)
English Text:
PCB151 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.0467 Range of Values 1870 1870
. Missing 415 2285

LBX151LA - PCB151 Lipid Adj (ng/g)

Variable Name:
LBX151LA
SAS Label:
PCB151 Lipid Adj (ng/g)
English Text:
PCB151 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 9.3 Range of Values 1870 1870
. Missing 415 2285

LBD151LC - PCB151 Comment Code

Variable Name:
LBD151LC
SAS Label:
PCB151 Comment Code
English Text:
PCB151 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 1470 1470
1 Below lower detection limit 400 1870
. Missing 415 2285

LBX153 - PCB153 (ng/g)

Variable Name:
LBX153
SAS Label:
PCB153 (ng/g)
English Text:
PCB153 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0061 to 6.5094 Range of Values 1896 1896
. Missing 389 2285

LBX153LA - PCB153 Lipid Adj (ng/g)

Variable Name:
LBX153LA
SAS Label:
PCB153 Lipid Adj (ng/g)
English Text:
PCB153 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.05 to 986 Range of Values 1896 1896
. Missing 389 2285

LBD153LC - PCB153 Comment Code

Variable Name:
LBD153LC
SAS Label:
PCB153 Comment Code
English Text:
PCB153 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 1896 1896
1 Below lower detection limit 0 1896
. Missing 389 2285

LBX170 - PCB170 (ng/g)

Variable Name:
LBX170
SAS Label:
PCB170 (ng/g)
English Text:
PCB170 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 1.9736 Range of Values 1888 1888
. Missing 397 2285

LBX170LA - PCB170 Lipid Adj (ng/g)

Variable Name:
LBX170LA
SAS Label:
PCB170 Lipid Adj (ng/g)
English Text:
PCB170 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 299 Range of Values 1888 1888
. Missing 397 2285

LBD170LC - PCB170 Comment Code

Variable Name:
LBD170LC
SAS Label:
PCB170 Comment Code
English Text:
PCB170 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 1825 1825
1 Below lower detection limit 63 1888
. Missing 397 2285

LBX172 - PCB172 (ng/g)

Variable Name:
LBX172
SAS Label:
PCB172 (ng/g)
English Text:
PCB172 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.1737 Range of Values 1878 1878
. Missing 407 2285

LBX172LA - PCB172 Lipid Adj (ng/g)

Variable Name:
LBX172LA
SAS Label:
PCB172 Lipid Adj (ng/g)
English Text:
PCB172 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 26.3 Range of Values 1878 1878
. Missing 407 2285

LBD172LC - PCB172 Comment Code

Variable Name:
LBD172LC
SAS Label:
PCB172 Comment Code
English Text:
PCB172 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 1218 1218
1 Below lower detection limit 660 1878
. Missing 407 2285

LBX177 - PCB177 (ng/g)

Variable Name:
LBX177
SAS Label:
PCB177 (ng/g)
English Text:
PCB177 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.3931 Range of Values 1882 1882
. Missing 403 2285

LBX177LA - PCB177 Lipid Adj (ng/g)

Variable Name:
LBX177LA
SAS Label:
PCB177 Lipid Adj (ng/g)
English Text:
PCB177 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 51.87 Range of Values 1882 1882
. Missing 403 2285

LBD177LC - PCB177 Comment Code

Variable Name:
LBD177LC
SAS Label:
PCB177 Comment Code
English Text:
PCB177 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 1512 1512
1 Below lower detection limit 370 1882
. Missing 403 2285

LBX178 - PCB178 (ng/g)

Variable Name:
LBX178
SAS Label:
PCB178 (ng/g)
English Text:
PCB178 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.2255 Range of Values 1887 1887
. Missing 398 2285

LBX178LA - PCB178 Lipid Adj (ng/g)

Variable Name:
LBX178LA
SAS Label:
PCB178 Lipid Adj (ng/g)
English Text:
PCB178 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 29.76 Range of Values 1887 1887
. Missing 398 2285

LBD178LC - PCB178 Comment Code

Variable Name:
LBD178LC
SAS Label:
PCB178 Comment Code
English Text:
PCB178 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 1428 1428
1 Below lower detection limit 459 1887
. Missing 398 2285

LBX180 - PCB180 (ng/g)

Variable Name:
LBX180
SAS Label:
PCB180 (ng/g)
English Text:
PCB180 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 4.1411 Range of Values 1896 1896
. Missing 389 2285

LBX180LA - PCB180 Lipid Adj (ng/g)

Variable Name:
LBX180LA
SAS Label:
PCB180 Lipid Adj (ng/g)
English Text:
PCB180 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 627 Range of Values 1896 1896
. Missing 389 2285

LBD180LC - PCB180 Comment Code

Variable Name:
LBD180LC
SAS Label:
PCB180 Comment Code
English Text:
PCB180 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 1881 1881
1 Below lower detection limit 15 1896
. Missing 389 2285

LBX183 - PCB183 (ng/g)

Variable Name:
LBX183
SAS Label:
PCB183 (ng/g)
English Text:
PCB183 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.3845 Range of Values 1886 1886
. Missing 399 2285

LBX183LA - PCB183 Lipid Adj (ng/g)

Variable Name:
LBX183LA
SAS Label:
PCB183 Lipid Adj (ng/g)
English Text:
PCB183 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 50.74 Range of Values 1886 1886
. Missing 399 2285

LBD183LC - PCB183 Comment Code

Variable Name:
LBD183LC
SAS Label:
PCB183 Comment Code
English Text:
PCB183 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 1671 1671
1 Below lower detection limit 215 1886
. Missing 399 2285

LBX187 - PCB187 (ng/g)

Variable Name:
LBX187
SAS Label:
PCB187 (ng/g)
English Text:
PCB187 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 1.1938 Range of Values 1889 1889
. Missing 396 2285

LBX187LA - PCB187 Lipid Adj (ng/g)

Variable Name:
LBX187LA
SAS Label:
PCB187 Lipid Adj (ng/g)
English Text:
PCB187 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 158 Range of Values 1889 1889
. Missing 396 2285

LBD187LC - PCB187 Comment Code

Variable Name:
LBD187LC
SAS Label:
PCB187 Comment Code
English Text:
PCB187 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 1849 1849
1 Below lower detection limit 40 1889
. Missing 396 2285

LBX194 - PCB194 (ng/g)

Variable Name:
LBX194
SAS Label:
PCB194 (ng/g)
English Text:
PCB194 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.887 Range of Values 1835 1835
. Missing 450 2285

LBX194LA - PCB194 Lipid Adj (ng/g)

Variable Name:
LBX194LA
SAS Label:
PCB194 Lipid Adj (ng/g)
English Text:
PCB194 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 149 Range of Values 1835 1835
. Missing 450 2285

LBD194LC - PCB194 Comment Code

Variable Name:
LBD194LC
SAS Label:
PCB194 Comment Code
English Text:
PCB194 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 1436 1436
1 Below lower detection limit 399 1835
. Missing 450 2285

LBX195 - PCB195 (ng/g)

Variable Name:
LBX195
SAS Label:
PCB195 (ng/g)
English Text:
PCB195 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0007 to 0.1213 Range of Values 1820 1820
. Missing 465 2285

LBX195LA - PCB195 Lipid Adj (ng/g)

Variable Name:
LBX195LA
SAS Label:
PCB195 Lipid Adj (ng/g)
English Text:
PCB195 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 17.2 Range of Values 1820 1820
. Missing 465 2285

LBD195LC - PCB195 Comment Code

Variable Name:
LBD195LC
SAS Label:
PCB195 Comment Code
English Text:
PCB195 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 983 983
1 Below lower detection limit 837 1820
. Missing 465 2285

LBX196 - PCB196 & 203 (ng/g)

Variable Name:
LBX196
SAS Label:
PCB196 & 203 (ng/g)
English Text:
PCB196 & 203 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 0.8771 Range of Values 1878 1878
. Missing 407 2285

LBX196LA - PCB196 & 203 Lipid Adj (ng/g)

Variable Name:
LBX196LA
SAS Label:
PCB196 & 203 Lipid Adj (ng/g)
English Text:
PCB196 & 203 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 148 Range of Values 1878 1878
. Missing 407 2285

LBD196LC - PCB196 & 203 Comment Code

Variable Name:
LBD196LC
SAS Label:
PCB196 & 203 Comment Code
English Text:
PCB196 & 203 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 1629 1629
1 Below lower detection limit 249 1878
. Missing 407 2285

LBD199 - PCB199 (ng/g)

Variable Name:
LBD199
SAS Label:
PCB199 (ng/g)
English Text:
PCB199 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0004 to 1.7719 Range of Values 1861 1861
. Missing 424 2285

LBD199LA - PCB199 Lipid Adj (ng/g)

Variable Name:
LBD199LA
SAS Label:
PCB199 Lipid Adj (ng/g)
English Text:
PCB199 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.04 to 298 Range of Values 1861 1861
. Missing 424 2285

LBD199LC - PCB199 Comment Code

Variable Name:
LBD199LC
SAS Label:
PCB199 Comment Code
English Text:
PCB199 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 1604 1604
1 Below lower detection limit 257 1861
. Missing 424 2285

LBX206 - PCB206 (ng/g)

Variable Name:
LBX206
SAS Label:
PCB206 (ng/g)
English Text:
PCB206 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0007 to 1.0477 Range of Values 1867 1867
. Missing 418 2285

LBX206LA - PCB206 Lipid Adj (ng/g)

Variable Name:
LBX206LA
SAS Label:
PCB206 Lipid Adj (ng/g)
English Text:
PCB206 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.1 to 176 Range of Values 1867 1867
. Missing 418 2285

LBD206LC - PCB206 Comment Code

Variable Name:
LBD206LC
SAS Label:
PCB206 Comment Code
English Text:
PCB206 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 1733 1733
1 Below lower detection limit 134 1867
. Missing 418 2285

LBX209 - PCB209 (ng/g)

Variable Name:
LBX209
SAS Label:
PCB209 (ng/g)
English Text:
PCB209 (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0007 to 0.6335 Range of Values 1854 1854
. Missing 431 2285

LBX209LA - PCB209 Lipid Adj (ng/g)

Variable Name:
LBX209LA
SAS Label:
PCB209 Lipid Adj (ng/g)
English Text:
PCB209 Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.06 to 100 Range of Values 1854 1854
. Missing 431 2285

LBD209LC - PCB209 Comment Code

Variable Name:
LBD209LC
SAS Label:
PCB209 Comment Code
English Text:
PCB209 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 1718 1718
1 Below lower detection limit 136 1854
. Missing 431 2285