Table of Contents

Locator Record

Title: Organochlorine Pesticides (L28OCP_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:Organochlorines were collected in serum on a one-third subsample.
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

Organochlorine pesticides, an older class of pesticides, are effective against a variety of insects. These chemicals were introduced in the 1940s, and many of their uses have been cancelled or restricted by the U.S. EPA because of their environmental persistence and potential adverse effects on wildlife and human health. Many organochlorines are no longer used widely in the U.S., but other countries continue to use them. Hexachlorobenzene has been used primarily as a fungicide or biocide.

Organochlorine pesticides are generally persistent in the environment and tend to bioaccumulate. Because these chemicals are fat soluble, they are found at higher concentrations in fatty foods. In the general population, diet is the main source of exposure, primarily through the ingestion of fatty foods such as dairy products and fish.

Eligible Sample

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

Description of Laboratory Methodology

Thirty-eight ortho-substituted polychlorinated biphenyls (PCBs), 13 persistent chlorinated pesticides, and selected pesticide metabolites are measured in serum by high-resolution gas chromatography/isotope-dilution high-resolution mass spectrometry (HRGC/ID-HRMS). All serum specimens are handled using Universal Precautions.

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. Before quantification, 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 x 0.25 mm x 0.25 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 responses corresponding 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 respective confidence intervals. The method detection limit (MDL) for each analyte is calculated correcting for sample weight and recovery. The total lipid content 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 and other “dioxin-like” PCBs, based on the WHO-TEF system. Prior to reporting results, all quality control (QC) data undergo a final review by a 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

Measures of organochlorines 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 of organochlorines 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. The variable named LBD___LC indicates whether the 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.  

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

WTSB2YR - Two-year MEC weights of subsample B

Variable Name:
WTSB2YR
SAS Label:
Two-year MEC weights of subsample B
English Text:
Two-year MEC weights of subsample B
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 435025.30254 Range of Values 2337 2337
. Missing 0 2337

LBXHCB - Hexachlorobenzene (ng/g)

Variable Name:
LBXHCB
SAS Label:
Hexachlorobenzene (ng/g)
English Text:
Hexachlorobenzene (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0116 to 1.1847 Range of Values 1961 1961
. Missing 376 2337

LBXHCBLA - Hexachlorobenzene Lipid Adj (ng/g)

Variable Name:
LBXHCBLA
SAS Label:
Hexachlorobenzene Lipid Adj (ng/g)
English Text:
Hexachlorobenzene Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.5556 to 174 Range of Values 1961 1961
. Missing 376 2337

LBDHCBLC - Hexachlorobenzene Comment Code

Variable Name:
LBDHCBLC
SAS Label:
Hexachlorobenzene Comment Code
English Text:
Hexachlorobenzene 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 1959 1959
1 Below lower detection limit 2 1961
. Missing 376 2337

LBXBHC - Beta-hexachlorocyclohexane (ng/g)

Variable Name:
LBXBHC
SAS Label:
Beta-hexachlorocyclohexane (ng/g)
English Text:
Beta-hexachloro-cyclohexane (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0065 to 22.9709 Range of Values 1959 1959
. Missing 378 2337

LBXBHCLA - B-hexachlorocyclohexane Lipid Adj (ng/g)

Variable Name:
LBXBHCLA
SAS Label:
B-hexachlorocyclohexane Lipid Adj (ng/g)
English Text:
Beta-hexachlorocyclohexane Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.9 to 2850 Range of Values 1959 1959
. Missing 378 2337

LBDBHCLC - Beta-hexachlorocyclohexane Comment Code

Variable Name:
LBDBHCLC
SAS Label:
Beta-hexachlorocyclohexane Comment Code
English Text:
Beta-hexachlorocyclohexane 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 1252 1252
1 Below lower detection limit 707 1959
. Missing 378 2337

LBXGHC - Gamma-hexachlorocyclohexane (ng/g)

Variable Name:
LBXGHC
SAS Label:
Gamma-hexachlorocyclohexane (ng/g)
English Text:
Gamma-hexachloro-cyclohexane (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0062 to 1.7438 Range of Values 1960 1960
. Missing 377 2337

LBXGHCLA - G-hexachlorocyclohexane Lipid Adj (ng/g)

Variable Name:
LBXGHCLA
SAS Label:
G-hexachlorocyclohexane Lipid Adj (ng/g)
English Text:
Gamma-hexachlorocyclohexane Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3536 to 304 Range of Values 1960 1960
. Missing 377 2337

LBDGHCLC - Gamma-hexachlorocyclohexane Comment Code

Variable Name:
LBDGHCLC
SAS Label:
Gamma-hexachlorocyclohexane Comment Code
English Text:
Gamma-hexachlorocyclohexane 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 1942 1960
. Missing 377 2337

LBXPDE - p,p'-DDE (ng/g)

Variable Name:
LBXPDE
SAS Label:
p,p'-DDE (ng/g)
English Text:
ppDDE (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.011 to 160.5999 Range of Values 1956 1956
. Missing 381 2337

LBXPDELA - ppDDE Lipid Adj (ng/g)

Variable Name:
LBXPDELA
SAS Label:
ppDDE Lipid Adj (ng/g)
English Text:
ppDDE Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.556 to 22900 Range of Values 1956 1956
. Missing 381 2337

LBDPDELC - ppDDE Comment Code

Variable Name:
LBDPDELC
SAS Label:
ppDDE Comment Code
English Text:
ppDDE 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 1951 1951
1 Below lower detection limit 5 1956
. Missing 381 2337

LBXPDT - p,p'-DDT (ng/g)

Variable Name:
LBXPDT
SAS Label:
p,p'-DDT (ng/g)
English Text:
ppDDT (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0071 to 7.4432 Range of Values 1965 1965
. Missing 372 2337

LBXPDTLA - ppDDT Lipid Adj (ng/g)

Variable Name:
LBXPDTLA
SAS Label:
ppDDT Lipid Adj (ng/g)
English Text:
ppDDT Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.9 to 1040 Range of Values 1965 1965
. Missing 372 2337

LBDPDTLC - ppDDT Comment Code

Variable Name:
LBDPDTLC
SAS Label:
ppDDT Comment Code
English Text:
ppDDT 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 1400 1400
1 Below lower detection limit 565 1965
. Missing 372 2337

LBXODT - o,p'-DDT (ng/g)

Variable Name:
LBXODT
SAS Label:
o,p'-DDT (ng/g)
English Text:
opDDT (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0063 to 1.7937 Range of Values 1946 1946
. Missing 391 2337

LBXODTLA - opDDT Lipid Adj (ng/g)

Variable Name:
LBXODTLA
SAS Label:
opDDT Lipid Adj (ng/g)
English Text:
opDDT Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.495 to 223 Range of Values 1946 1946
. Missing 391 2337

LBDODTLC - opDDT Comment Code

Variable Name:
LBDODTLC
SAS Label:
opDDT Comment Code
English Text:
opDDT 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 115 115
1 Below lower detection limit 1831 1946
. Missing 391 2337

LBXOXY - Oxychlordane (ng/g)

Variable Name:
LBXOXY
SAS Label:
Oxychlordane (ng/g)
English Text:
Oxychlordane (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0067 to 2.0588 Range of Values 1978 1978
. Missing 359 2337

LBXOXYLA - Oxychlordane Lipid Adj (ng/g)

Variable Name:
LBXOXYLA
SAS Label:
Oxychlordane Lipid Adj (ng/g)
English Text:
Oxychlordane Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.0607 to 159 Range of Values 1978 1978
. Missing 359 2337

LBDOXYLC - Oxychlordane Comment Code

Variable Name:
LBDOXYLC
SAS Label:
Oxychlordane Comment Code
English Text:
Oxychlordane 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 1453 1453
1 Below lower detection limit 525 1978
. Missing 359 2337

LBXTNA - Trans-nonachlor (ng/g)

Variable Name:
LBXTNA
SAS Label:
Trans-nonachlor (ng/g)
English Text:
Trans-nonachlor (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0071 to 3.1553 Range of Values 1955 1955
. Missing 382 2337

LBXTNALA - Trans-nonachlor Lipid Adj (ng/g)

Variable Name:
LBXTNALA
SAS Label:
Trans-nonachlor Lipid Adj (ng/g)
English Text:
Trans-nonachlor Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.2728 to 355 Range of Values 1955 1955
. Missing 382 2337

LBDTNALC - Trans-nonachlor Comment Code

Variable Name:
LBDTNALC
SAS Label:
Trans-nonachlor Comment Code
English Text:
Trans-nonachlor 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 1701 1701
1 Below lower detection limit 254 1955
. Missing 382 2337

LBXHPE - Heptachlor Epoxide (ng/g)

Variable Name:
LBXHPE
SAS Label:
Heptachlor Epoxide (ng/g)
English Text:
Heptachlor Epoxide (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0065 to 1.2601 Range of Values 1963 1963
. Missing 374 2337

LBXHPELA - Heptachlor Epoxide Lipid Adj (ng/g)

Variable Name:
LBXHPELA
SAS Label:
Heptachlor Epoxide Lipid Adj (ng/g)
English Text:
Heptachlor Epoxide 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 154 Range of Values 1963 1963
. Missing 374 2337

LBDHPELC - Heptachlor Epoxide Comment Code

Variable Name:
LBDHPELC
SAS Label:
Heptachlor Epoxide Comment Code
English Text:
Heptachlor Epoxide 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 1019 1019
1 Below lower detection limit 944 1963
. Missing 374 2337

LBXMIR - Mirex (ng/g)

Variable Name:
LBXMIR
SAS Label:
Mirex (ng/g)
English Text:
Mirex (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0065 to 1.1989 Range of Values 1951 1951
. Missing 386 2337

LBXMIRLA - Mirex Lipid Adj (ng/g)

Variable Name:
LBXMIRLA
SAS Label:
Mirex Lipid Adj (ng/g)
English Text:
Mirex Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.495 to 166 Range of Values 1951 1951
. Missing 386 2337

LBDMIRLC - Mirex Comment Code

Variable Name:
LBDMIRLC
SAS Label:
Mirex Comment Code
English Text:
Mirex 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 695 695
1 Below lower detection limit 1256 1951
. Missing 386 2337

LBXALD - Aldrin (ng/g)

Variable Name:
LBXALD
SAS Label:
Aldrin (ng/g)
English Text:
Aldrin (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0062 to 0.3567 Range of Values 1946 1946
. Missing 391 2337

LBXALDLA - Aldrin Lipid Adj (ng/g)

Variable Name:
LBXALDLA
SAS Label:
Aldrin Lipid Adj (ng/g)
English Text:
Aldrin Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3536 to 58.1 Range of Values 1946 1946
. Missing 391 2337

LBDALDLC - Aldrin Comment Code

Variable Name:
LBDALDLC
SAS Label:
Aldrin Comment Code
English Text:
Aldrin 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 2 2
1 Below lower detection limit 1944 1946
. Missing 391 2337

LBXDIE - Dieldrin (ng/g)

Variable Name:
LBXDIE
SAS Label:
Dieldrin (ng/g)
English Text:
Dieldrin (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.007 to 3.1761 Range of Values 1952 1952
. Missing 385 2337

LBXDIELA - Dieldrin Lipid Adj (ng/g)

Variable Name:
LBXDIELA
SAS Label:
Dieldrin Lipid Adj (ng/g)
English Text:
Dieldrin Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.2 to 448 Range of Values 1952 1952
. Missing 385 2337

LBDDIELC - Dieldrin Comment Code

Variable Name:
LBDDIELC
SAS Label:
Dieldrin Comment Code
English Text:
Dieldrin 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 1597 1597
1 Below lower detection limit 355 1952
. Missing 385 2337

LBXEND - Endrin (ng/g)

Variable Name:
LBXEND
SAS Label:
Endrin (ng/g)
English Text:
Endrin (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0062 to 0.0383 Range of Values 1825 1825
. Missing 512 2337

LBXENDLA - Endrin Lipid Adj (ng/g)

Variable Name:
LBXENDLA
SAS Label:
Endrin Lipid Adj (ng/g)
English Text:
Endrin Lipid Adjusted (ng/g)
Target:
Both males and females 12 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3536 to 6.1 Range of Values 1825 1825
. Missing 512 2337

LBDENDLC - Endrin Comment Code

Variable Name:
LBDENDLC
SAS Label:
Endrin Comment Code
English Text:
Endrin 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 2 2
1 Below lower detection limit 1823 1825
. Missing 512 2337