National Health and Nutrition Examination Survey

2013-2014 Data Documentation, Codebook, and Frequencies

Volatile Organic Compounds (VOCs) and Trihalomethanes/MTBE - Blood - Special Sample (VOCWBS_H)

Data File: VOCWBS_H.xpt

First Published: April 2017

Last Revised: December 2017

Note: Blood volatile organic compound (VOC) results for styrene will not be publicly released for the NHANES 2013-2014 cycle (VOCWB_H, VOCWBS_H), because measured concentrations were significantly biased by elevated background levels that existed in the mobile examination centers (MEC) at the time the blood samples were collected. The three sets of NHANES trailers were refurbished with construction materials containing styrene. An increase in blood concentrations for this VOC could be detected in NHANES participants, though the levels encountered by participants and employees in the MECs were well within permissible exposure limits, and reflect those found in common non-occupational environments that exist in recently constructed buildings or vehicles.

Component Description

Volatile Organic Compounds and Trihalomethanes/MTBE (Whole Blood)

Volatile organic compounds (VOCs) are a large group of chemicals that have been used as solvents, degreasers, and cleaning agents in industry and consumer products. Many of the VOCs were found to contaminate ground water and drinking water sources. Because of human health concerns, these VOCs have been banned or restricted from most uses.

The halogenated solvents are VOCs consisting of a hydrocarbon chain or one hydrocarbon substituted with one or more chlorine or bromine atoms. Most of these chemicals are used as degreasers and solvents in various products such as paint. In the past, 1,1,1-trichloroethane was used as a dry cleaning agent, insect fumigant, and solvent in consumer products. Methylene chloride, perchloroethylene, and trichloroethene are other VOCs that were widely used in the past.

Benzene, toluene, ethylbenzene, xylene, and styrene, collectively referred to as BTEXS, are components of tobacco smoke. Along with 2,5-dimethylfuran, these VOCs are usually detected in the blood of cigarette smokers at higher levels than in non-smokers. Chlorobenzene (monochlorobenzene) and the three dichlorobenzenes are halogenated aromatic hydrocarbons primarily used in industrial and chemical synthetic processes. Chlorobenzene has been used to produce DDT, phenol, and nitrobenzene. The dichlorobenzenes are also chemical intermediates in the synthesis of dyes, pesticides, and other industrial products. 1,4-Dichlorobenzene (para-dichlorobenzene) is used also as a moth repellent and as a deodorizer. Disinfection by-products (DBP), including bromodichloromethane, dibromochloromethane, bromoform, and chloroform are formed when chlorine interacts with natural organic materials found in water. Primary sources of DBPs are chlorinated drinking water and recreational water bodies, such as swimming pools.

The prevalence of disinfection by-products in drinking water supplies has raised concerns about possible adverse health effects from chronic exposure to these potentially carcinogenic compounds. Methyl-tert-butyl ether (MTBE) was used as an additive to replace lead in gasoline, but its use was banned after widespread ground water contamination was discovered.

Inhalation is the most common VOC route of exposure in the general population, including indoor sources such as paints, adhesives, cleaning solutions, and aerosolized insecticide sprays; industries producing these solvents; and contaminated waste disposal sites. Drinking water may contribute to exposure when underground drinking water supplies are contaminated. After they are absorbed in the body, VOCs are rapidly eliminated in exhaled breath, or may be rapidly metabolized and eliminated in the urine.

Eligible Sample

Participants aged 18 years and older, who met the regular one-half subsample selection criteria, were included in this special subsample. Additionally, to oversample adult smokers, those participants aged 18 years and older, not in the regular one-half subsample, who smoked at least 100 cigarettes in their entire lifetime (SMQ020=1) and now smoke cigarettes every day (SMQ040=1), were also included in this special subsample.

Description of Laboratory Methodology

An automated analytical method was developed using capillary gas chromatography (GC) and mass spectrometry (MS) with selected-ion monitoring (SIM) detection and isotope-dilution. This method quantifies levels of individual VOCs and Trihalomethanes (THMs) and MTBE in whole blood to low-parts-per-trillion range. Because non-occupationally exposed individuals have blood VOC concentrations within this range, this method is applicable for determining these quantities and investigating cases of sustained or recent low-level exposure.

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

There were no changes to the lab method, lab equipment, or lab site for this component in the NHANES 2013-2014 cycle.

Laboratory Method Files

Volatile Organic Compounds (VOCs) & Trihalomethanes/MTBE (January 2017)

Laboratory Quality Assurance and Monitoring

Whole blood 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 refrigerated (2-8°C) conditions until they are shipped to National Center for Environmental Health, for testing.

The NHANES quality assurance and quality control (QA/QC) protocols meet the 1988 Clinical Laboratory Improvement Amendments 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 CDC/NCEH Tobacco and Volatile Branch quality control and quality assurance performance criteria for accuracy and precision, similar to the Westgard rules (Caudill, et al., 2008).

Data Processing and Editing

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

Analytic Notes

Refer to the 2013-2014 Laboratory Data Overview for general information on NHANES laboratory data.

Subsample Weights

Whole blood VOCs were measured in a special smoking subsample of participants 18 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.

Demographic and Other Related Variables

The analysis of NHANES laboratory data must be conducted using the appropriate survey design and demographic variables. The NHANES 2013-2014 Demographics File contains demographic data, health indicators, and other related information collected during household interviews as well as the sample design variables. The recommended procedure for variance estimation requires use of stratum and PSU variables (SDMVSTRA and SDMVPSU, respectively) in the demographic data file.

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

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

Detection limits

The detection limits were constant for all of the analytes in the data set. Two variables are provided for each of these analytes. The variable name ending in “LC” (ex., LBD2DFLC) indicates whether the result was below the limit of detection: the value “0” means that the result was at or above the limit of detection, “1” indicates that the result was below the limit of detection. For analytes with analytic results below the lower limit of detection (ex., LBD2DFLC=1), an imputed fill value was placed in the analyte results field. This value is the lower limit of detection divided by square root of 2 (LLOD/sqrt [2]). The other variable prefixed LBX (ex., LBX2DF) provides the analytic result for that analyte.

Lower Limit of Detection (LLOD, in ng/mL) for Whole Blood VOCs
VARIABLE NAME	SAS LABEL	LLOD
LBX2DF	Blood 2,5-Dimethylfuran (ng/mL)	0.0110
LBX4CE	Blood 1,1,1,2-Tetrachloroethane (ng/mL)	0.0400
LBXV06	Blood Hexane (ng/mL)	0.1220
LBXV07N	Blood Heptane (ng/mL)	0.1000
LBXV08N	Blood Octane (ng/mL)	0.1000
LBXV1D	Blood 1,2-Dichlorobenzene (ng/mL)	0.0250
LBXV2A	Blood 1,2-Dichloroethane (ng/mL)	0.0100
LBXV3B	Blood 1,3-Dichlorobenzene (ng/mL)	0.0250
LBXV4C	Blood Tetrachloroethene (ng/mL)	0.0480
LBXVBF	Blood Bromoform (ng/mL)	0.0080
LBXVBM	Blood Bromodichloromethane (ng/mL)	0.0060
LBXVBZ	Blood Benzene (ng/mL)	0.0240
LBXVC6	Blood Cyclohexane (ng/mL)	0.0200
LBXVCB	Blood Chlorobenzene (ng/mL)	0.0110
LBXVCF	Blood Chloroform (ng/mL)	0.0080
LBXVCM	Blood Dibromochloromethane (ng/mL)	0.0050
LBXVCT	Blood Carbon Tetrachloride (ng/mL)	0.0050
LBXVDB	Blood 1,4-Dichlorobenzene (ng/mL)	0.0400
LBXVDE	Blood 1,2-Dibromoethane (ng/mL)	0.0150
LBXVDEE	Blood Diethylether (ng/mL)	0.0400
LBXVDX	Blood 1,4-Dioxane (ng/mL)	0.5000
LBXVEA	Blood Ethyl Acetate (ng/mL)	0.1580
LBXVEB	Blood Ethylbenzene (ng/mL)	0.0240
LBXVEC	Blood Chloroethane (ng/mL)	0.0450
LBXVFN	Blood Furan (ng/mL)	0.0250
LBXVIPB	Blood Isopropylbenzene (ng/mL)	0.0400
LBXVMC	Blood Methylene chloride(ng/mL)	0.2500
LBXVMCP	Blood Methylcyclopentane (ng/mL)	0.0200
LBXVME	Blood MTBE (ng/mL)	0.0100
LBXVNB	Blood Nitrobenzene (ng/mL)	0.3200
LBXVOX	Blood o-Xylene (ng/mL)	0.0240
LBXVTC	Blood Trichloroethene (ng/mL)	0.0120
LBXVTE	Blood 1,1,1-Trichloroethane (ng/mL)	0.0100
LBXVTFT	Blood ααα-Trifluorotoluene (ng/mL)	0.0400
LBXVTHF	Blood Tetrahydrofuran (ng/mL)	0.1250
LBXVTO	Blood Toluene (ng/mL)	0.0250
LBXVTP	Blood 1,2,3-Trichloropropane (ng/mL)	0.0400
LBXVVB	Blood Vinyl Bromide (ng/mL)	0.0450
LBXVXY	Blood m-/p-Xylene (ng/mL)	0.0340

References

Caudill, S.P., Schleicher, R.L., Pirkle, J.L. Multi-rule quality control for the age-related eye disease study. Statist. Med. (2008) 27(20):4094-40106.
Westgard J.O., Barry P.L., Hunt M.R., Groth T. A multi-rule Shewhart chart for quality control in clinical chemistry. Clin Chem (1981) 27:493-501.

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 18 YEARS - 150 YEARS

WTSVS2YR - VOC Smoking Subsample Weight

Variable Name:: WTSVS2YR
SAS Label:: VOC Smoking Subsample Weight
English Text:: Two year smoking weights
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
7182.03776 to 316913.86472	Range of Values	3189	3189
0	No Lab Result	258	3447
.	Missing	0	3447

LBX2DF - Blood 2,5-Dimethylfuran (ng/mL)

Variable Name:: LBX2DF
SAS Label:: Blood 2,5-Dimethylfuran (ng/mL)
English Text:: Blood 2,5-Dimethylfuran (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0078 to 0.78	Range of Values	3187	3187
.	Missing	260	3447

LBD2DFLC - Blood 2,5-Dimethylfuran Comment Code

Variable Name:: LBD2DFLC
SAS Label:: Blood 2,5-Dimethylfuran Comment Code
English Text:: Blood 2,5-Dimethylfuran Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	991	991
1	Below lower detection limit	2196	3187
2	Detectable result and exceeds the calibrated range of assay	0	3187
.	Missing	260	3447

LBX4CE - Blood 1,1,1,2-Tetrachloroethane (ng/mL)

Variable Name:: LBX4CE
SAS Label:: Blood 1,1,1,2-Tetrachloroethane (ng/mL)
English Text:: Blood 1,1,1,2-Tetrachloroethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283	0.0283	3129	3129
.	Missing	318	3447

LBD4CELC - Blood 1,1,1,2-Tetrachloroethane Cmt Code

Variable Name:: LBD4CELC
SAS Label:: Blood 1,1,1,2-Tetrachloroethane Cmt Code
English Text:: Blood 1,1,1,2-Tetrachloroethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3129	3129
2	Detectable result and exceeds the calibrated range of assay	0	3129
.	Missing	318	3447

LBXV06 - Blood Hexane (ng/mL)

Variable Name:: LBXV06
SAS Label:: Blood Hexane (ng/mL)
English Text:: Blood Hexane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0863 to 21.5	Range of Values	2926	2926
.	Missing	521	3447

LBDV06LC - Blood Hexane Comment Code

Variable Name:: LBDV06LC
SAS Label:: Blood Hexane Comment Code
English Text:: Blood Hexane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	67	67
1	Below lower detection limit	2859	2926
2	Detectable result and exceeds the calibrated range of assay	0	2926
.	Missing	521	3447

LBXV07N - Blood Heptane (ng/mL)

Variable Name:: LBXV07N
SAS Label:: Blood Heptane (ng/mL)
English Text:: Blood Heptane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0707 to 2.65	Range of Values	3085	3085
.	Missing	362	3447

LBDV07LC - Blood Heptane Comment Code

Variable Name:: LBDV07LC
SAS Label:: Blood Heptane Comment Code
English Text:: Blood Heptane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	65	65
1	Below lower detection limit	3020	3085
2	Detectable result and exceeds the calibrated range of assay	0	3085
.	Missing	362	3447

LBXV08N - Blood Octane (ng/mL)

Variable Name:: LBXV08N
SAS Label:: Blood Octane (ng/mL)
English Text:: Blood Octane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0707 to 0.865	Range of Values	3110	3110
.	Missing	337	3447

LBDV08LC - Blood Octane Comment Code

Variable Name:: LBDV08LC
SAS Label:: Blood Octane Comment Code
English Text:: Blood Octane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	43	43
1	Below lower detection limit	3067	3110
2	Detectable result and exceeds the calibrated range of assay	0	3110
.	Missing	337	3447

LBXV1D - Blood 1,2-Dichlorobenzene (ng/mL)

Variable Name:: LBXV1D
SAS Label:: Blood 1,2-Dichlorobenzene (ng/mL)
English Text:: Blood 1,2-Dichlorobenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0177 to 0.0177	Range of Values	3133	3133
.	Missing	314	3447

LBDV1DLC - Blood 1,2-Dichlorobenzene Comment Code

Variable Name:: LBDV1DLC
SAS Label:: Blood 1,2-Dichlorobenzene Comment Code
English Text:: Blood 1,2-Dichlorobenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3133	3133
2	Detectable result and exceeds the calibrated range of assay	0	3133
.	Missing	314	3447

LBXV2A - Blood 1,2-Dichloroethane (ng/mL)

Variable Name:: LBXV2A
SAS Label:: Blood 1,2-Dichloroethane (ng/mL)
English Text:: Blood 1,2-Dichloroethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0071 to 0.247	Range of Values	3187	3187
.	Missing	260	3447

LBDV2ALC - Blood 1,2-Dichloroethane Comment Code

Variable Name:: LBDV2ALC
SAS Label:: Blood 1,2-Dichloroethane Comment Code
English Text:: Blood 1,2-Dichloroethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	49	49
1	Below lower detection limit	3138	3187
2	Detectable result and exceeds the calibrated range of assay	0	3187
.	Missing	260	3447

LBXV3B - Blood 1,3-Dichlorobenzene (ng/mL)

Variable Name:: LBXV3B
SAS Label:: Blood 1,3-Dichlorobenzene (ng/mL)
English Text:: Blood 1,3-Dichlorobenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0177 to 0.0177	Range of Values	3161	3161
.	Missing	286	3447

LBDV3BLC - Blood 1,3-Dichlorobenzene Comment Code

Variable Name:: LBDV3BLC
SAS Label:: Blood 1,3-Dichlorobenzene Comment Code
English Text:: Blood 1,3-Dichlorobenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3161	3161
2	Detectable result and exceeds the calibrated range of assay	0	3161
.	Missing	286	3447

LBXV4C - Blood Tetrachloroethene (ng/mL)

Variable Name:: LBXV4C
SAS Label:: Blood Tetrachloroethene (ng/mL)
English Text:: Blood Tetrachloroethene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0339 to 16	Range of Values	2958	2958
.	Missing	489	3447

LBDV4CLC - Blood Tetrachloroethene Comment Code

Variable Name:: LBDV4CLC
SAS Label:: Blood Tetrachloroethene Comment Code
English Text:: Blood Tetrachloroethene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	238	238
1	Below lower detection limit	2720	2958
2	Detectable result and exceeds the calibrated range of assay	0	2958
.	Missing	489	3447

LBXVBF - Blood Bromoform (ng/mL)

Variable Name:: LBXVBF
SAS Label:: Blood Bromoform (ng/mL)
English Text:: Blood Bromoform (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0057 to 0.118	Range of Values	3146	3146
.	Missing	301	3447

LBDVBFLC - Blood Bromoform Comment Code

Variable Name:: LBDVBFLC
SAS Label:: Blood Bromoform Comment Code
English Text:: Blood Bromoform Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	160	160
1	Below lower detection limit	2986	3146
2	Detectable result and exceeds the calibrated range of assay	0	3146
.	Missing	301	3447

LBXVBM - Blood Bromodichloromethane (ng/mL)

Variable Name:: LBXVBM
SAS Label:: Blood Bromodichloromethane (ng/mL)
English Text:: Blood Bromodichloromethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0042 to 0.066	Range of Values	3139	3139
.	Missing	308	3447

LBDVBMLC - Blood Bromodichloromethane Comment Code

Variable Name:: LBDVBMLC
SAS Label:: Blood Bromodichloromethane Comment Code
English Text:: Blood Bromodichloromethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	386	386
1	Below lower detection limit	2753	3139
2	Detectable result and exceeds the calibrated range of assay	0	3139
.	Missing	308	3447

LBXVBZ - Blood Benzene (ng/mL)

Variable Name:: LBXVBZ
SAS Label:: Blood Benzene (ng/mL)
English Text:: Blood Benzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.017 to 6.29	Range of Values	3068	3068
.	Missing	379	3447

LBDVBZLC - Blood Benzene Comment Code

Variable Name:: LBDVBZLC
SAS Label:: Blood Benzene Comment Code
English Text:: Blood Benzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1125	1125
1	Below lower detection limit	1943	3068
2	Detectable result and exceeds the calibrated range of assay	0	3068
.	Missing	379	3447

LBXVC6 - Blood Cyclohexane (ng/mL)

Variable Name:: LBXVC6
SAS Label:: Blood Cyclohexane (ng/mL)
English Text:: Blood Cyclohexane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0141 to 4.06	Range of Values	3000	3000
.	Missing	447	3447

LBDVC6LC - Blood Cyclohexane Comment Code

Variable Name:: LBDVC6LC
SAS Label:: Blood Cyclohexane Comment Code
English Text:: Blood Cyclohexane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	55	55
1	Below lower detection limit	2945	3000
2	Detectable result and exceeds the calibrated range of assay	0	3000
.	Missing	447	3447

LBXVCB - Blood Chlorobenzene (ng/mL)

Variable Name:: LBXVCB
SAS Label:: Blood Chlorobenzene (ng/mL)
English Text:: Blood Chlorobenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0078 to 0.021	Range of Values	3188	3188
.	Missing	259	3447

LBDVCBLC - Blood Chlorobenzene Comment Code

Variable Name:: LBDVCBLC
SAS Label:: Blood Chlorobenzene Comment Code
English Text:: Blood Chlorobenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	3	3
1	Below lower detection limit	3185	3188
2	Detectable result and exceeds the calibrated range of assay	0	3188
.	Missing	259	3447

LBXVCF - Blood Chloroform (ng/mL)

Variable Name:: LBXVCF
SAS Label:: Blood Chloroform (ng/mL)
English Text:: Blood Chloroform (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0057 to 0.687	Range of Values	3115	3115
.	Missing	332	3447

LBDVCFLC - Blood Chloroform Comment Code

Variable Name:: LBDVCFLC
SAS Label:: Blood Chloroform Comment Code
English Text:: Blood Chloroform Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1563	1563
1	Below lower detection limit	1552	3115
2	Detectable result and exceeds the calibrated range of assay	0	3115
.	Missing	332	3447

LBXVCM - Blood Dibromochloromethane (ng/mL)

Variable Name:: LBXVCM
SAS Label:: Blood Dibromochloromethane (ng/mL)
English Text:: Blood Dibromochloromethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0035 to 0.047	Range of Values	3180	3180
.	Missing	267	3447

LBDVCMLC - Blood Dibromochloromethane Comment Code

Variable Name:: LBDVCMLC
SAS Label:: Blood Dibromochloromethane Comment Code
English Text:: Blood Dibromochloromethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	339	339
1	Below lower detection limit	2841	3180
2	Detectable result and exceeds the calibrated range of assay	0	3180
.	Missing	267	3447

LBXVCT - Blood Carbon Tetrachloride (ng/mL)

Variable Name:: LBXVCT
SAS Label:: Blood Carbon Tetrachloride (ng/mL)
English Text:: Blood Carbon Tetrachloride (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0035 to 0.008	Range of Values	3185	3185
.	Missing	262	3447

LBDVCTLC - Blood Carbon Tetrachloride Comment Code

Variable Name:: LBDVCTLC
SAS Label:: Blood Carbon Tetrachloride Comment Code
English Text:: Blood Carbon Tetrachloride Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1	1
1	Below lower detection limit	3184	3185
2	Detectable result and exceeds the calibrated range of assay	0	3185
.	Missing	262	3447

LBXVDB - Blood 1,4-Dichlorobenzene (ng/mL)

Variable Name:: LBXVDB
SAS Label:: Blood 1,4-Dichlorobenzene (ng/mL)
English Text:: Blood 1,4-Dichlorobenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283 to 93.2	Range of Values	3156	3156
.	Missing	291	3447

LBDVDBLC - Blood 1,4-Dichlorobenzene Comment Code

Variable Name:: LBDVDBLC
SAS Label:: Blood 1,4-Dichlorobenzene Comment Code
English Text:: Blood 1,4-Dichlorobenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1355	1355
1	Below lower detection limit	1801	3156
2	Detectable result and exceeds the calibrated range of assay	0	3156
.	Missing	291	3447

LBXVDE - Blood 1,2-Dibromoethane (ng/mL)

Variable Name:: LBXVDE
SAS Label:: Blood 1,2-Dibromoethane (ng/mL)
English Text:: Blood 1,2-Dibromoethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0106	0.0106	3188	3188
.	Missing	259	3447

LBDVDELC - Blood 1,2-Dibromoethane Comment Code

Variable Name:: LBDVDELC
SAS Label:: Blood 1,2-Dibromoethane Comment Code
English Text:: Blood 1,2-Dibromoethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3188	3188
2	Detectable result and exceeds the calibrated range of assay	0	3188
.	Missing	259	3447

LBXVDEE - Blood Diethyl Ether (ng/mL)

Variable Name:: LBXVDEE
SAS Label:: Blood Diethyl Ether (ng/mL)
English Text:: Blood Diethyl Ether (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283 to 0.26	Range of Values	3026	3026
.	Missing	421	3447

LBDVEELC - Blood Diethyl Ether Comment Code

Variable Name:: LBDVEELC
SAS Label:: Blood Diethyl Ether Comment Code
English Text:: Blood Diethyl Ether Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	6	6
1	Below lower detection limit	3020	3026
2	Detectable result and exceeds the calibrated range of assay	0	3026
.	Missing	421	3447

LBXVDX - Blood 1,4-Dioxane (ng/mL)

Variable Name:: LBXVDX
SAS Label:: Blood 1,4-Dioxane (ng/mL)
English Text:: Blood 1,4-Dioxane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.3536 to 0.3536	Range of Values	3100	3100
.	Missing	347	3447

LBDVDXLC - Blood 1,4-Dioxane Comment Code

Variable Name:: LBDVDXLC
SAS Label:: Blood 1,4-Dioxane Comment Code
English Text:: Blood 1,4-Dioxane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3100	3100
2	Detectable result and exceeds the calibrated range of assay	0	3100
.	Missing	347	3447

LBXVEA - Blood Ethyl Acetate (ng/mL)

Variable Name:: LBXVEA
SAS Label:: Blood Ethyl Acetate (ng/mL)
English Text:: Blood Ethyl Acetate (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.1117 to 50.7	Range of Values	3128	3128
.	Missing	319	3447

LBDVEALC - Blood Ethyl Acetate Comment Code

Variable Name:: LBDVEALC
SAS Label:: Blood Ethyl Acetate Comment Code
English Text:: Blood Ethyl Acetate Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	72	72
1	Below lower detection limit	3056	3128
2	Detectable result and exceeds the calibrated range of assay	0	3128
.	Missing	319	3447

LBXVEB - Blood Ethylbenzene (ng/mL)

Variable Name:: LBXVEB
SAS Label:: Blood Ethylbenzene (ng/mL)
English Text:: Blood Ethylbenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.017 to 8.22	Range of Values	3061	3061
.	Missing	386	3447

LBDVEBLC - Blood Ethylbenzene Comment Code

Variable Name:: LBDVEBLC
SAS Label:: Blood Ethylbenzene Comment Code
English Text:: Blood Ethylbenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1193	1193
1	Below lower detection limit	1868	3061
2	Detectable result and exceeds the calibrated range of assay	0	3061
.	Missing	386	3447

LBXVEC - Blood Chloroethane (ng/mL)

Variable Name:: LBXVEC
SAS Label:: Blood Chloroethane (ng/mL)
English Text:: Blood Chloroethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0318 to 0.34	Range of Values	3181	3181
.	Missing	266	3447

LBDVECLC - Blood Chloroethane Comment Code

Variable Name:: LBDVECLC
SAS Label:: Blood Chloroethane Comment Code
English Text:: Blood Chloroethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	17	17
1	Below lower detection limit	3164	3181
2	Detectable result and exceeds the calibrated range of assay	0	3181
.	Missing	266	3447

LBXVFN - Blood Furan (ng/mL)

Variable Name:: LBXVFN
SAS Label:: Blood Furan (ng/mL)
English Text:: Blood Furan (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0177 to 0.373	Range of Values	3188	3188
.	Missing	259	3447

LBDVFNLC - Blood Furan Comment Code

Variable Name:: LBDVFNLC
SAS Label:: Blood Furan Comment Code
English Text:: Blood Furan Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	831	831
1	Below lower detection limit	2357	3188
2	Detectable result and exceeds the calibrated range of assay	0	3188
.	Missing	259	3447

LBXVIPB - Blood Isopropylbenzene (ng/mL)

Variable Name:: LBXVIPB
SAS Label:: Blood Isopropylbenzene (ng/mL)
English Text:: Blood Isopropylbenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283 to 0.172	Range of Values	3189	3189
.	Missing	258	3447

LBDVIPLC - Blood Isopropylbenzene Comment Code

Variable Name:: LBDVIPLC
SAS Label:: Blood Isopropylbenzene Comment Code
English Text:: Blood Isopropylbenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	6	6
1	Below lower detection limit	3183	3189
2	Detectable result and exceeds the calibrated range of assay	0	3189
.	Missing	258	3447

LBXVMC - Blood Methylene Chloride (ng/mL)

Variable Name:: LBXVMC
SAS Label:: Blood Methylene Chloride (ng/mL)
English Text:: Blood Methylene Chloride (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.1768 to 17.5	Range of Values	3122	3122
.	Missing	325	3447

LBDVMCLC - Blood Methylene Chloride Comment Code

Variable Name:: LBDVMCLC
SAS Label:: Blood Methylene Chloride Comment Code
English Text:: Blood Methylene Chloride Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	6	6
1	Below lower detection limit	3116	3122
2	Detectable result and exceeds the calibrated range of assay	0	3122
.	Missing	325	3447

LBXVME - Blood MTBE (ng/mL)

Variable Name:: LBXVME
SAS Label:: Blood MTBE (ng/mL)
English Text:: Blood Methyl-tert-butyl ether (MTBE) (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0071 to 0.123	Range of Values	3023	3023
.	Missing	424	3447

LBDVMELC - Blood MTBE Comment Code

Variable Name:: LBDVMELC
SAS Label:: Blood MTBE Comment Code
English Text:: Blood Methyl-tert-butyl ether (MTBE) Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	74	74
1	Below lower detection limit	2949	3023
2	Detectable result and exceeds the calibrated range of assay	0	3023
.	Missing	424	3447

LBXVMCP - Blood Methylcyclopentane (ng/mL)

Variable Name:: LBXVMCP
SAS Label:: Blood Methylcyclopentane (ng/mL)
English Text:: Blood Methylcyclopentane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0141 to 15.8	Range of Values	3135	3135
.	Missing	312	3447

LBDVMPLC - Blood Methylcyclopentane Comment Code

Variable Name:: LBDVMPLC
SAS Label:: Blood Methylcyclopentane Comment Code
English Text:: Blood Methylcyclopentane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	56	56
1	Below lower detection limit	3079	3135
2	Detectable result and exceeds the calibrated range of assay	0	3135
.	Missing	312	3447

LBXVNB - Blood Nitrobenzene (ng/mL)

Variable Name:: LBXVNB
SAS Label:: Blood Nitrobenzene (ng/mL)
English Text:: Blood Nitrobenzene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.2263 to 0.2263	Range of Values	3163	3163
.	Missing	284	3447

LBDVNBLC - Blood Nitrobenzene Comment Code

Variable Name:: LBDVNBLC
SAS Label:: Blood Nitrobenzene Comment Code
English Text:: Blood Nitrobenzene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3163	3163
2	Detectable result and exceeds the calibrated range of assay	0	3163
.	Missing	284	3447

LBXVOX - Blood o-Xylene (ng/mL)

Variable Name:: LBXVOX
SAS Label:: Blood o-Xylene (ng/mL)
English Text:: Blood o-Xylene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.017 to 5.63	Range of Values	3189	3189
.	Missing	258	3447

LBDVOXLC - Blood o-Xylene Comment Code

Variable Name:: LBDVOXLC
SAS Label:: Blood o-Xylene Comment Code
English Text:: Blood o-Xylene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1160	1160
1	Below lower detection limit	2029	3189
2	Detectable result and exceeds the calibrated range of assay	0	3189
.	Missing	258	3447

LBXVTC - Blood Trichloroethene (ng/mL)

Variable Name:: LBXVTC
SAS Label:: Blood Trichloroethene (ng/mL)
English Text:: Blood Trichloroethene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0085 to 5.05	Range of Values	3084	3084
.	Missing	363	3447

LBDVTCLC - Blood Trichloroethene Comment Code

Variable Name:: LBDVTCLC
SAS Label:: Blood Trichloroethene Comment Code
English Text:: Blood Trichloroethene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	27	27
1	Below lower detection limit	3057	3084
2	Detectable result and exceeds the calibrated range of assay	0	3084
.	Missing	363	3447

LBXVTE - Blood 1,1,1-Trichloroethane (ng/mL)

Variable Name:: LBXVTE
SAS Label:: Blood 1,1,1-Trichloroethane (ng/mL)
English Text:: Blood 1,1,1-Trichloroethane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0071 to 0.085	Range of Values	3189	3189
.	Missing	258	3447

LBDVTELC - Blood 1,1,1-Trichloroethane Comment Code

Variable Name:: LBDVTELC
SAS Label:: Blood 1,1,1-Trichloroethane Comment Code
English Text:: Blood 1,1,1-Trichloroethane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	18	18
1	Below lower detection limit	3171	3189
2	Detectable result and exceeds the calibrated range of assay	0	3189
.	Missing	258	3447

LBXVTFT - Blood aaa - Trifluorotoluene (ng/mL)

Variable Name:: LBXVTFT
SAS Label:: Blood aaa - Trifluorotoluene (ng/mL)
English Text:: Blood aaa - Trifluorotoluene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283 to 0.0283	Range of Values	3189	3189
.	Missing	258	3447

LBDVFTLC - Blood aaa -Trifluorotoluene Comment Code

Variable Name:: LBDVFTLC
SAS Label:: Blood aaa -Trifluorotoluene Comment Code
English Text:: Blood aaa -Trifluorotoluene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3189	3189
2	Detectable result and exceeds the calibrated range of assay	0	3189
.	Missing	258	3447

LBXVTHF - Blood Tetrahydrofuran (ng/mL)

Variable Name:: LBXVTHF
SAS Label:: Blood Tetrahydrofuran (ng/mL)
English Text:: Blood Tetrahydrofuran (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0884 to 41.1	Range of Values	3056	3056
.	Missing	391	3447

LBDVHTLC - Blood Tetrahydrofuran Comment Code

Variable Name:: LBDVHTLC
SAS Label:: Blood Tetrahydrofuran Comment Code
English Text:: Blood Tetrahydrofuran Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	30	30
1	Below lower detection limit	3026	3056
2	Detectable result and exceeds the calibrated range of assay	0	3056
.	Missing	391	3447

LBXVTO - Blood Toluene (ng/mL)

Variable Name:: LBXVTO
SAS Label:: Blood Toluene (ng/mL)
English Text:: Blood Toluene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0177 to 14.7	Range of Values	3079	3079
.	Missing	368	3447

LBDVTOLC - Blood Toluene Comment Code

Variable Name:: LBDVTOLC
SAS Label:: Blood Toluene Comment Code
English Text:: Blood Toluene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	2976	2976
1	Below lower detection limit	103	3079
2	Detectable result and exceeds the calibrated range of assay	0	3079
.	Missing	368	3447

LBXVTP - Blood 1,2,3-Trichloropropane (ng/mL)

Variable Name:: LBXVTP
SAS Label:: Blood 1,2,3-Trichloropropane (ng/mL)
English Text:: Blood 1,2,3-Trichloropropane (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0283 to 0.053	Range of Values	3163	3163
.	Missing	284	3447

LBDVTPLC - Blood 1,2,3-Trichloropropane Comt Code

Variable Name:: LBDVTPLC
SAS Label:: Blood 1,2,3-Trichloropropane Comt Code
English Text:: Blood 1,2,3-Trichloropropane Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	1	1
1	Below lower detection limit	3162	3163
2	Detectable result and exceeds the calibrated range of assay	0	3163
.	Missing	284	3447

LBXVVB - Blood Vinyl Bromide (ng/mL)

Variable Name:: LBXVVB
SAS Label:: Blood Vinyl Bromide (ng/mL)
English Text:: Blood Vinyl Bromide (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.0318 to 0.0318	Range of Values	3142	3142
.	Missing	305	3447

LBDVVBLC - Blood Vinyl Bromide Comment Code

Variable Name:: LBDVVBLC
SAS Label:: Blood Vinyl Bromide Comment Code
English Text:: Blood Vinyl Bromide Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	0	0
1	Below lower detection limit	3142	3142
2	Detectable result and exceeds the calibrated range of assay	0	3142
.	Missing	305	3447

LBXVXY - Blood m-/p-Xylene (ng/mL)

Variable Name:: LBXVXY
SAS Label:: Blood m-/p-Xylene (ng/mL)
English Text:: Blood m-/p-Xylene (ng/mL)
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
0.024 to 23.8	Range of Values	3157	3157
.	Missing	290	3447

LBDVXYLC - Blood m-/p-Xylene Comment Code

Variable Name:: LBDVXYLC
SAS Label:: Blood m-/p-Xylene Comment Code
English Text:: Blood m-/p-Xylene Comment Code
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
0	At or above detection limit	2217	2217
1	Below lower detection limit	940	3157
2	Detectable result and exceeds the calibrated range of assay	0	3157
.	Missing	290	3447

VTQ210 - Attached garage?

Variable Name:: VTQ210
SAS Label:: Attached garage?
English Text:: Does your home have an attached garage?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	1166	1166
2	No	1572	2738
7	Refused	0	2738
9	Don't know	1	2739
.	Missing	708	3447

VTQ220 - Private well?

Variable Name:: VTQ220
SAS Label:: Private well?
English Text:: Is the source of water for your home from a private well?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	273	273
2	No	2445	2718
7	Refused	0	2718
9	Don't know	19	2737
.	Missing	710	3447

VTQ200A - Store paints or fuels inside home?

Variable Name:: VTQ200A
SAS Label:: Store paints or fuels inside home?
English Text:: Do you currently store paints or fuels inside your home? Include your basement and attached garage.
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	901	901
2	No	1818	2719
7	Refused	0	2719
9	Don't know	16	2735
.	Missing	712	3447

VTQ231A - Moth balls or crystals?

Variable Name:: VTQ231A
SAS Label:: Moth balls or crystals?
English Text:: Do you currently use moth balls, moth crystals or toilet bowl deodorizers inside your home?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	633	633
2	No	2079	2712
7	Refused	0	2712
9	Don't know	20	2732
.	Missing	715	3447

VTQ241A - Did you cook with natural gas?

Variable Name:: VTQ241A
SAS Label:: Did you cook with natural gas?
English Text:: In the last 48 hours, did you cook or bake with natural gas?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	738	738
2	No	1991	2729
7	Refused	0	2729
9	Don't know	2	2731
.	Missing	716	3447

VTQ241B - How long ago did you cook w natural gas?

Variable Name:: VTQ241B
SAS Label:: How long ago did you cook w natural gas?
English Text:: How long ago, in hours, did you cook or bake with natural gas?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	738	738
.	Missing	2709	3447

VTQ244A - Did you pump gas in to your car?

Variable Name:: VTQ244A
SAS Label:: Did you pump gas in to your car?
English Text:: In the last 48 hours, did you pump gas into a car or other motor vehicle yourself?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	901	901
2	No	1828	2729
7	Refused	0	2729
9	Don't know	1	2730
.	Missing	717	3447

VTQ244B - Long ago did you pump gas in your car?

Variable Name:: VTQ244B
SAS Label:: Long ago did you pump gas in your car?
English Text:: How long ago, in hours, did you pump gas into a car or other motor vehicle yourself?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	901	901
.	Missing	2546	3447

VTQ265A - Spend 10+ minutes near cigarette smoke?

Variable Name:: VTQ265A
SAS Label:: Spend 10+ minutes near cigarette smoke?
English Text:: In the last 48 hours, did you smoke or spend 10 minutes near a person who was smoking a cigarette, cigar, or pipe?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	784	784
2	No	1944	2728
7	Refused	0	2728
9	Don't know	2	2730
.	Missing	717	3447

VTQ265B - Long since being near person smoking?

Variable Name:: VTQ265B
SAS Label:: Long since being near person smoking?
English Text:: How long ago, in hours, has it been since you smoked or spent 10 or more minutes near a person who was smoking a cigarette, cigar, or pipe?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	784	784
.	Missing	2663	3447

VTQ271A - In last 48 hrs, bathe for 5+ minutes?

Variable Name:: VTQ271A
SAS Label:: In last 48 hrs, bathe for 5+ minutes?
English Text:: In the last 48 hours, did you take a hot shower or bath for five minutes or longer?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	2343	2343
2	No	385	2728
7	Refused	0	2728
9	Don't know	2	2730
.	Missing	717	3447

VTQ271B - How long, in hrs, since you bathed?

Variable Name:: VTQ271B
SAS Label:: How long, in hrs, since you bathed?
English Text:: How long ago, in hours, has it been since your last shower or hot bath?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 99	Range of Values	2342	2342
.	Missing	1105	3447

VTQ281A - In past 48 hrs breathe paint fumes?

Variable Name:: VTQ281A
SAS Label:: In past 48 hrs breathe paint fumes?
English Text:: In the last 48 hours, did you breathe fumes from freshly painted indoor surfaces, paints, paint thinner, or varnish?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	79	79
2	No	2648	2727
7	Refused	0	2727
9	Don't know	2	2729
.	Missing	718	3447

VTQ281B - How long, since breathed paint fumes?

Variable Name:: VTQ281B
SAS Label:: How long, since breathed paint fumes?
English Text:: How long ago, in hours, has it been since you breathed fumes from freshly painted indoor surfaces, paints, paint thinner, or varnish?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	79	79
.	Missing	3368	3447

VTQ281C - In past 48 hrs breathe diesel fumes?

Variable Name:: VTQ281C
SAS Label:: In past 48 hrs breathe diesel fumes?
English Text:: In the last 48 hours, did you breathe fumes from diesel fuel or kerosene?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	90	90
2	No	2634	2724
7	Refused	0	2724
9	Don't know	5	2729
.	Missing	718	3447

VTQ281D - How long, since breathed diesel fumes?

Variable Name:: VTQ281D
SAS Label:: How long, since breathed diesel fumes?
English Text:: How long ago, in hours, has it been since you breathed fumes from diesel fuel or kerosene?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	90	90
.	Missing	3357	3447

VTQ281E - Breathe fingernail polish fumes?

Variable Name:: VTQ281E
SAS Label:: Breathe fingernail polish fumes?
English Text:: In the last 48 hours, did you breathe fumes from fingernail polish?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative
1	Yes	163	163
2	No	2565	2728
7	Refused	0	2728
9	Don't know	1	2729
.	Missing	718	3447

VTQ281F - How long since breathed polish fumes?

Variable Name:: VTQ281F
SAS Label:: How long since breathed polish fumes?
English Text:: How long ago, in hours, has it been since you breathed fumes from fingernail polish?
Target:: Both males and females 18 YEARS - 150 YEARS

Code or Value	Value Description	Count	Cumulative	Skip to Item
1 to 48	Range of Values	163	163
.	Missing	3284	3447

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