Table of Contents

Locator Record

Title: Heavy Metals (LAB06HM )
Contact Number: 1-866-441-NCHS
Years of Content: 1999 - 2000
First Published: March, 2005
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Heavy metals, Urinary Barium, Beryllium, Cadmium, Cobalt, Cesium, Molybdenum, Lead, Platinum, Antimony, Thallium, Tungsten, and Uranium
Record Source: NHANES 1999 - 2000
Survey Methodology: NHANES 1999 - 2000 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

Urinary Barium, Beryllium, Cadmium, Cobalt, Cesium, Molybdenum, Lead, Platinum, Antimony, Thallium, Tungsten, and Uranium

Trace metals have been associated with adverse health effects in occupational studies or laboratory studies, but have not been monitored in general population groups.

Information on levels of exposure to these compounds is essential to determine the need for regulatory mechanisms to reduce the levels of hazardous pollutants to which the general population is exposed and to establish population-based reference intervals for several potentially toxic metals.

Eligible Sample

Participants aged 6 years and older who met the subsample requirements and who did not meet any of the exclusion criteria composed the eligible sample.

Description of Laboratory Methodology

Urinary Barium, Beryllium, Cobalt, Cesium, Molybdenum, Lead, Platinum, Antimony, Thallium, and Tungsten

Inductively coupled plasma-mass spectrometry (ICP-MS) is a multi-element analytical technique.1 Liquid samples are introduced into the ICP through a nebulizer and spray chamber carried by a flowing argon stream. By coupling radio frequency power into flowing argon, a plasma is created in which the predominant species are positive argon ions and electrons. The sample passes through a region of the plasma with a temperature of 6000–8000 K. The thermal energy atomizes the sample and then ionizes the atoms. The ions, along with the argon, enter the mass spectrometer through the interface that separates the ICP, which operates at atmospheric pressure, from the mass spectrometer, which operates at a pressure of 10–6 torr. The mass spectrometer permits detection of ions at each mass in rapid sequence, allowing individual isotopes of an element to be determined. Electrical signals resulting from the detection of the ions are processed into digital information that is used to indicate the intensity of the ions and subsequently the concentration of the element. A total of 15 elements, including Be, Mn, Co, Ni, Mo, Sn, Sb, Cs, Ba, W, Pt, Tl, and Pb, are measured in urine by ICP-MS based on the method by Kevin J. Mulligan et al.2 Urine samples are diluted 1+9 with 2% v/v double-distilled concentrated nitric acid (GFS Chemicals Inc., Columbus, OH) containing both iridium and rhodium for multi-internal standardization. This procedure may be used for all 15 elements or subsets of the 15 elements.

This method is used to achieve rapid and accurate quantification of multiple elements of toxicological and nutritional interest. The method is sensitive enough to be used to rapidly screen urine specimens from subjects suspected of exposure to a number of important toxic elements or to evaluate environmental or other non-occupational exposure to these same elements.

6.2 ***Special Note Regarding Urine Cadmium***

Urine cadmium levels are corrected for interference from molybdenum oxide. The variable name for the corrected cadmium levels is URDUCD. The formula for the correction is:

URDUCD = URXUCD – [(0.00175* URXUMO) – 0.0136]

where URXUCD is the original value for the cadmium result.

Corrected values that are less than zero are recoded to equal zero. If the result for urine molybdenum is missing, then the result for the corrected cadmium result is also missing.

The corrected data set also includes a variable URDUCDLC to indicate which results were below the limit of detection. For results below the limit of detection, the corrected value was calculated using the detection limit for urinary cadmium divided by the square root of two (value = 0.04).

See below for further explanation of this correction:

6.3 Effect of Molybdenum Oxide on Urine Cadmium Results

The ICP-MS method for the determination of urine cadmium has not been corrected for a possible interference from molybdenum oxide, MoO. Because the historical Proficiency Testing (PT) results for urine Cd were well within expected ranges and no consistent bias was observed with these PT samples, including several years of challenges, it was thought that, at typical biological molybdenum levels and typical instrumental oxide levels, the interference would not be significant. Upon investigation with over 6000 NHANES samples analyzed, we were able to see a possible effect on the urine Cd results when the results for the urine Cd versus Mo concentration were plotted. This effect cannot be easily seen with a few hundred sample results. Upon further investigation, we determined that the historical NHANES urine Cd results were biased high. For example, a 1st order approximation of the effect of this interference was determined to be 0.33 µg/L (at the 50th percentile) for urine Cd without correcting for the MoO interference versus 0.19 µg/L with the correction. Therefore, we investigated how best to implement a revised analytical method to eliminate this interference. In addition, until DLS had received and implemented some new ICP-MS technology, we could not eliminate this interference using the traditional ICP-MS technologies. We have recently implemented this new technology (Dynamic Reaction Cell technology [DRC]) and have been able to develop a revised analytical method that allows for correction of this MoO interference.

A method comparison was performed using 208 samples that included the typical range of Cd and Mo concentrations in urine. The results are shown in Figure 1, where (CdStd Method – CdCorrected Method) is plotted versus the urine molybdenum concentration. CdStd Method is the non-DRC method and CdCorrected Method is the DRC method. The best fit regression line had an r2 = 0.81 and is given by Equation (1):

 (CdStd Method - CdCorrected Method) = 0.00175 (Mo) – 0.01360 (1)

Equation (2) is the adjustment equation used to correct the Standard Method results to the new Corrected method (the new DRC method).

CdCorrected Method = CdStd Method – (0.00175 * (Mo) + 0.01360 UCDCorrected Method
= UCdStd Method – (0.00175 * (UMO) + 0.01360 (2)

Data Processing and Editing

Automated data collection procedures for the survey were introduced in NHANES 1999. In the mobile examination centers (MECs) and analytical laboratories, data for the laboratory component is recorded directly onto a computerized data collection form. The system is centrally integrated and it allows for ongoing monitoring of much of the data. While the complete blood count and pregnancy analyses are performed in the MEC laboratory, most analyses are conducted elsewhere by approximately 21 laboratories across the United States.

Guidelines have been developed that provide standards for naming variables, filling missing values, and handling missing records. NCHS staff, assisted by contract staff, have developed data-editing specifications that check data sets for valid codes, ranges, and skip pattern consistencies and examine the consistency of values between interrelated variables. Comments have been reviewed and recoded. NCHS staff verifies extremely high and low values whenever possible, and numerous consistency checks are performed. Nonetheless, users should examine the range and frequency of values before analyzing data.

For laboratory tests with a lower detection limit, results below the lower detection limit are replaced with a value equal to the detection limit divided by the square root of two. This value has been created to help the user distinguish a nondetectable laboratory test result from a measured laboratory test result.

Laboratory Quality Assurance and Monitoring

Urine specimens are processed, stored, and shipped to the Division of Environmental Health Laboratory 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.

Analytic Notes

10.1 Urinary Barium, Beryllium, Cadmium, Cobalt, Cesium, Molybdenum, Lead, Platinum, Antimony, Thallium, Tungsten, and Uranium

Measures of this urinary multi-analyte profile are assessed in participants aged 6 years and over on a randomly selected 1/3 subsample. Specific sample weights for this subsample are included in this data file and should be used when analyzing these data. Read the Special Sample Weights for this Dataset section below before beginning analysis.

The dataset includes 2-year and 4-year subsample weights. The 4-year weights should be used if these 2001–2002 data are combined with 1999–2000 data. The 1999–2000 data files have been updated to include the subsample 4-year weights. The recommended procedure for variance estimation requires use of stratum and PSU variables (SDMVSTRA and SDMVPSU, respectively), which are included in the demographic data file for each data release. For further information, see the NHANES Analytic Guidelines, June 2004 version at: http://www.cdc.gov/nchs/data/nhanes/nhanes_general_guidelines_june_04.pdf .

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 6 YEARS - 150 YEARS

WTSHM2YR - Heavy Metal Subsample 2 Year Mec Weight

Variable Name:
WTSHM2YR
SAS Label:
Heavy Metal Subsample 2 Year Mec Weight
English Text:
Heavy Metal Subsample 2 year Mec Weight
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3374.3792502 to 743254.6001 Range of Values 2465 2465
0 Non-Respondent 82 2547
. Missing 0 2547

WTSHM4YR - Heavy Metal Subsample 4 Year Mec Weight

Variable Name:
WTSHM4YR
SAS Label:
Heavy Metal Subsample 4 Year Mec Weight
English Text:
Heavy Metal Subsample 4 Year Weight
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2225.5226276 to 348772.28063 Range of Values 2465 2465
0 Non-Respondent 82 2547
. Missing 0 2547

WTSHM01 - Heavy Metal Mec Weight Jack Knife Rep 01

Variable Name:
WTSHM01
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 01
English Text:
Heavy Metal Mec Weight Jack Knife Rep 01
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 761759.9788500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM02 - Heavy Metal Mec Weight Jack Knife Rep 02

Variable Name:
WTSHM02
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 02
English Text:
Heavy Metal Mec Weight Jack Knife Rep 01
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 760522.7130400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM03 - Heavy Metal Mec Weight Jack Knife Rep 03

Variable Name:
WTSHM03
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 03
English Text:
Heavy Metal Mec Weight Jack Knife Rep 03
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 743883.9676100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM04 - Heavy Metal Mec Weight Jack Knife Rep 04

Variable Name:
WTSHM04
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 04
English Text:
Heavy Metal Mec Weight Jack Knife Rep 04
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 754495.2333500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM05 - Heavy Metal Mec Weight Jack Knife Rep 05

Variable Name:
WTSHM05
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 05
English Text:
Heavy Metal Mec Weight Jack Knife Rep 05
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 744733.3766200 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM06 - Heavy Metal Mec Weight Jack Knife Rep 06

Variable Name:
WTSHM06
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 06
English Text:
Heavy Metal Mec Weight Jack Knife Rep 06
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 767701.6198700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM07 - Heavy Metal Mec Weight Jack Knife Rep 07

Variable Name:
WTSHM07
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 07
English Text:
Heavy Metal Mec Weight Jack Knife Rep 07
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 776431.8632000 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM08 - Heavy Metal Mec Weight Jack Knife Rep 08

Variable Name:
WTSHM08
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 08
English Text:
Heavy Metal Mec Weight Jack Knife Rep 08
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 748354.6263100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM09 - Heavy Metal Mec Weight Jack Knife Rep 09

Variable Name:
WTSHM09
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 09
English Text:
Heavy Metal Mec Weight Jack Knife Rep 09
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 752674.9363300 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM10 - Heavy Metal Mec Weight Jack Knife Rep 10

Variable Name:
WTSHM10
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 10
English Text:
Heavy Metal Mec Weight Jack Knife Rep 10
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 749367.2485700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM11 - Heavy Metal Mec Weight Jack Knife Rep 11

Variable Name:
WTSHM11
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 11
English Text:
Heavy Metal Mec Weight Jack Knife Rep 11
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 769069.9116500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM12 - Heavy Metal Mec Weight Jack Knife Rep 12

Variable Name:
WTSHM12
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 12
English Text:
Heavy Metal Mec Weight Jack Knife Rep 12
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 745357.8328600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM13 - Heavy Metal Mec Weight Jack Knife Rep 13

Variable Name:
WTSHM13
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 13
English Text:
Heavy Metal Mec Weight Jack Knife Rep 13
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 751784.5195900 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM14 - Heavy Metal Mec Weight Jack Knife Rep 14

Variable Name:
WTSHM14
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 14
English Text:
Heavy Metal Mec Weight Jack Knife Rep 14
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 756202.1517100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM15 - Heavy Metal Mec Weight Jack Knife Rep 15

Variable Name:
WTSHM15
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 15
English Text:
Heavy Metal Mec Weight Jack Knife Rep 15
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 779916.2820600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM16 - Heavy Metal Mec Weight Jack Knife Rep 16

Variable Name:
WTSHM16
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 16
English Text:
Heavy Metal Mec Weight Jack Knife Rep 16
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 770746.6538900 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM17 - Heavy Metal Mec Weight Jack Knife Rep 17

Variable Name:
WTSHM17
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 17
English Text:
Heavy Metal Mec Weight Jack Knife Rep 17
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 745836.1583100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM18 - Heavy Metal Mec Weight Jack Knife Rep 18

Variable Name:
WTSHM18
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 18
English Text:
Heavy Metal Mec Weight Jack Knife Rep 18
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 752175.2488800 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM19 - Heavy Metal Mec Weight Jack Knife Rep 19

Variable Name:
WTSHM19
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 19
English Text:
Heavy Metal Mec Weight Jack Knife Rep 19
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 767395.1659400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM20 - Heavy Metal Mec Weight Jack Knife Rep 20

Variable Name:
WTSHM20
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 20
English Text:
Heavy Metal Mec Weight Jack Knife Rep 20
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 742064.4742700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM21 - Heavy Metal Mec Weight Jack Knife Rep 21

Variable Name:
WTSHM21
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 21
English Text:
Heavy Metal Mec Weight Jack Knife Rep 21
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 753259.4428400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM22 - Heavy Metal Mec Weight Jack Knife Rep 22

Variable Name:
WTSHM22
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 22
English Text:
Heavy Metal Mec Weight Jack Knife Rep 22
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 724217.9075700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM23 - Heavy Metal Mec Weight Jack Knife Rep 23

Variable Name:
WTSHM23
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 23
English Text:
Heavy Metal Mec Weight Jack Knife Rep 23
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 738408.7636400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM24 - Heavy Metal Mec Weight Jack Knife Rep 24

Variable Name:
WTSHM24
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 24
English Text:
Heavy Metal Mec Weight Jack Knife Rep 24
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 751800.8751500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM25 - Heavy Metal Mec Weight Jack Knife Rep 25

Variable Name:
WTSHM25
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 25
English Text:
Heavy Metal Mec Weight Jack Knife Rep 25
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 744083.6260000 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM26 - Heavy Metal Mec Weight Jack Knife Rep 26

Variable Name:
WTSHM26
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 26
English Text:
Heavy Metal Mec Weight Jack Knife Rep 26
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 748647.3163800 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM27 - Heavy Metal Mec Weight Jack Knife Rep 27

Variable Name:
WTSHM27
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 27
English Text:
Heavy Metal Mec Weight Jack Knife Rep 27
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 788279.8898000 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM28 - Heavy Metal Mec Weight Jack Knife Rep 28

Variable Name:
WTSHM28
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 28
English Text:
Heavy Metal Mec Weight Jack Knife Rep 28
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 765101.3745500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM29 - Heavy Metal Mec Weight Jack Knife Rep 29

Variable Name:
WTSHM29
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 29
English Text:
Heavy Metal Mec Weight Jack Knife Rep 29
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 750138.4971700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM30 - Heavy Metal Mec Weight Jack Knife Rep 30

Variable Name:
WTSHM30
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 30
English Text:
Heavy Metal Mec Weight Jack Knife Rep 30
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 772537.6458700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM31 - Heavy Metal Mec Weight Jack Knife Rep 31

Variable Name:
WTSHM31
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 31
English Text:
Heavy Metal Mec Weight Jack Knife Rep 31
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 741848.0830500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM32 - Heavy Metal Mec Weight Jack Knife Rep 32

Variable Name:
WTSHM32
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 32
English Text:
Heavy Metal Mec Weight Jack Knife Rep 32
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 812354.7085700 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM33 - Heavy Metal Mec Weight Jack Knife Rep 33

Variable Name:
WTSHM33
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 33
English Text:
Heavy Metal Mec Weight Jack Knife Rep 33
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 766491.6560600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM34 - Heavy Metal Mec Weight Jack Knife Rep 34

Variable Name:
WTSHM34
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 34
English Text:
Heavy Metal Mec Weight Jack Knife Rep 34
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 747676.4899400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM35 - Heavy Metal Mec Weight Jack Knife Rep 35

Variable Name:
WTSHM35
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 35
English Text:
Heavy Metal Mec Weight Jack Knife Rep 35
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 752432.0350200 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM36 - Heavy Metal Mec Weight Jack Knife Rep 36

Variable Name:
WTSHM36
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 36
English Text:
Heavy Metal Mec Weight Jack Knife Rep 36
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 780501.3171500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM37 - Heavy Metal Mec Weight Jack Knife Rep 37

Variable Name:
WTSHM37
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 37
English Text:
Heavy Metal Mec Weight Jack Knife Rep 37
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 746102.1158400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM38 - Heavy Metal Mec Weight Jack Knife Rep 38

Variable Name:
WTSHM38
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 38
English Text:
Heavy Metal Mec Weight Jack Knife Rep 38
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 751521.3352600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM39 - Heavy Metal Mec Weight Jack Knife Rep 39

Variable Name:
WTSHM39
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 39
English Text:
Heavy Metal Mec Weight Jack Knife Rep 39
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 761331.0659400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM40 - Heavy Metal Mec Weight Jack Knife Rep 40

Variable Name:
WTSHM40
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 40
English Text:
Heavy Metal Mec Weight Jack Knife Rep 40
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 736874.0670000 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM41 - Heavy Metal Mec Weight Jack Knife Rep 41

Variable Name:
WTSHM41
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 41
English Text:
Heavy Metal Mec Weight Jack Knife Rep 41
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 782508.0707800 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM42 - Heavy Metal Mec Weight Jack Knife Rep 42

Variable Name:
WTSHM42
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 42
English Text:
Heavy Metal Mec Weight Jack Knife Rep 42
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 769323.7345100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM43 - Heavy Metal Mec Weight Jack Knife Rep 43

Variable Name:
WTSHM43
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 43
English Text:
Heavy Metal Mec Weight Jack Knife Rep 43
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 760774.8539600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM44 - Heavy Metal Mec Weight Jack Knife Rep 44

Variable Name:
WTSHM44
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 44
English Text:
Heavy Metal Mec Weight Jack Knife Rep 44
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 767886.0260800 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM45 - Heavy Metal Mec Weight Jack Knife Rep 45

Variable Name:
WTSHM45
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 45
English Text:
Heavy Metal Mec Weight Jack Knife Rep 45
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 801697.8189100 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM46 - Heavy Metal Mec Weight Jack Knife Rep 46

Variable Name:
WTSHM46
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 46
English Text:
Heavy Metal Mec Weight Jack Knife Rep 46
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 764672.6226000 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM47 - Heavy Metal Mec Weight Jack Knife Rep 47

Variable Name:
WTSHM47
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 47
English Text:
Heavy Metal Mec Weight Jack Knife Rep 47
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 776574.3824600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM48 - Heavy Metal Mec Weight Jack Knife Rep 48

Variable Name:
WTSHM48
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 48
English Text:
Heavy Metal Mec Weight Jack Knife Rep 48
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 740844.9772900 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM49 - Heavy Metal Mec Weight Jack Knife Rep 49

Variable Name:
WTSHM49
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 49
English Text:
Heavy Metal Mec Weight Jack Knife Rep 49
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 743342.3638400 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM50 - Heavy Metal Mec Weight Jack Knife Rep 50

Variable Name:
WTSHM50
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 50
English Text:
Heavy Metal Mec Weight Jack Knife Rep 50
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 755782.4552500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM51 - Heavy Metal Mec Weight Jack Knife Rep 51

Variable Name:
WTSHM51
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 51
English Text:
Heavy Metal Mec Weight Jack Knife Rep 51
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 762569.1059500 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

WTSHM52 - Heavy Metal Mec Weight Jack Knife Rep 52

Variable Name:
WTSHM52
SAS Label:
Heavy Metal Mec Weight Jack Knife Rep 52
English Text:
Heavy Metal Mec Weight Jack Knife Rep 52
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0000000 to 747789.3668600 Range of Values 0 0
0 0 2547 2547
. Missing 0 2547

URXUCR - Creatinine, urine (mg/dL)

Variable Name:
URXUCR
SAS Label:
Creatinine, urine (mg/dL)
English Text:
Creatinine, urine (mg/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 to 614 Range of Values 2476 2476
. Missing 71 2547

URXUBA - Barium, urine (ng/mL)

Variable Name:
URXUBA
SAS Label:
Barium, urine (ng/mL)
English Text:
Barium, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.08 to 76.2 Range of Values 2180 2180
. Missing 367 2547

URXUBE - Beryllium, urine (ng/mL)

Variable Name:
URXUBE
SAS Label:
Beryllium, urine (ng/mL)
English Text:
Beryllium, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.09 to 0.3 Range of Values 2465 2465
. Missing 82 2547

URDUCD - Cadmium, urine (ng/mL)

Variable Name:
URDUCD
SAS Label:
Cadmium, urine (ng/mL)
English Text:
Cadmium, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 12.83475 Range of Values 2257 2257
. Missing 290 2547

URDUCDLC - Urinary cadmium comment code

Variable Name:
URDUCDLC
SAS Label:
Urinary cadmium comment code
English Text:
Urinary cadmium comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 detectable result 2379 2379
1 below detectable limit 86 2465
. Missing 82 2547

URXUCO - Cobalt, urine (ng/mL)

Variable Name:
URXUCO
SAS Label:
Cobalt, urine (ng/mL)
English Text:
Cobalt, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.05 to 556.6 Range of Values 2465 2465
. Missing 82 2547

URXUCS - Cesium, urine (ng/mL)

Variable Name:
URXUCS
SAS Label:
Cesium, urine (ng/mL)
English Text:
Cesium, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.07 to 229.9 Range of Values 2464 2464
. Missing 83 2547

URXUMO - Molybdenum, urine (ng/mL)

Variable Name:
URXUMO
SAS Label:
Molybdenum, urine (ng/mL)
English Text:
Molybdenum, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.6 to 839.5 Range of Values 2257 2257
. Missing 290 2547

URXUPB - Lead, urine (ng/mL)

Variable Name:
URXUPB
SAS Label:
Lead, urine (ng/mL)
English Text:
Lead, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.07 to 84.2 Range of Values 2465 2465
. Missing 82 2547

URXUPT - Platinum, urine (ng/mL)

Variable Name:
URXUPT
SAS Label:
Platinum, urine (ng/mL)
English Text:
Platinum, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 73.43 Range of Values 2465 2465
. Missing 82 2547

URXUSB - Antimony, urine (ng/mL)

Variable Name:
URXUSB
SAS Label:
Antimony, urine (ng/mL)
English Text:
Antimony, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 5.7 Range of Values 2276 2276
. Missing 271 2547

URXUTL - Thallium, urine (ng/mL)

Variable Name:
URXUTL
SAS Label:
Thallium, urine (ng/mL)
English Text:
Thallium, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.01 to 1.42 Range of Values 2413 2413
. Missing 134 2547

URXUTU - Tungsten, urine (ng/mL)

Variable Name:
URXUTU
SAS Label:
Tungsten, urine (ng/mL)
English Text:
Tungsten, urine (ng/mL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.03 to 13.42 Range of Values 2338 2338
. Missing 209 2547