Table of Contents

Locator Record

Title: Vitamin A, E and Carotenoids (L45VIT_C )
Contact Number: 1-866-441-NCHS
Years of Content: 2003 - 2004
First Published: October, 2007
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:fat-soluble micronutrients
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

The objectives of this component are:

  1. to provide data for monitoring secular trends in measures of nutritional status in the U.S. population;
  2. to evaluate the effect of people’s habits and behaviors such as physical activity and the use of alcohol, tobacco, and dietary supplements on people’s nutritional status; and
  3. to evaluate the effect of changes in nutrition and public health policies including welfare reform legislation, food fortification policy, and child nutrition programs on the nutritional status of the U.S. population.

These data will be used to estimate deficiencies and toxicities of specific nutrients in the population and subgroups, to provide population reference data, and to estimate the contribution of diet, supplements, and other factors to serum levels of nutrients. Data will be used for research to further define nutrient requirements as well as optimal levels for disease prevention and health promotion.

Eligible Sample

Participants aged 6 years and older who do not meet any of the exclusion criteria are eligible.

Description of Laboratory Methodology

Vitamin A, Vitamin E, and Carotenoids

Serum concentrations of vitamin A (retinol, retinyl palmitate, retinyl stearate), vitamin E (α-, δ-, and γ-tocopherols), and twelve carotenoids (lutein, zeaxanthin, α-cryptoxanthin, β-cryptoxanthin, trans-lycopene,cis-lycopene, α-carotene, trans-β-carotene, cis-β-carotene, ciscombined lutein/zeaxanthin,phytoene and phytofluene) are measured using high performance liquid chromatography with multiwavelength photodiode-array absorbance detection. A small volume (150 μL) of serum/plasma is mixed with an equal volume of buffer, and then mixed with 2 volumes of ethanol containing the internal standard (tocol). The analytes are extracted from the aqueous phase into hexane. The combined hexane extracts are dried under vacuum. The extract is redissolved in ethyl acetate and diluted in mobile phase. An aliquot is injected onto a C18 reversed phase column and eluted isocratically. The analytes all possess absorbance and/or fluorescence which are proportional to their concentration in solution; therefore these properties are used for quantitative analysis. The mode of detection is chosen to provide the highest sensitivity and selectivity. Carotenoids are measured by absorbance at 450 nm. Retinol, retinyl esters, phytoene and phytofluene are measured by UV absorbance near their absorption maxima of 325 nm, 280 nm and 340 nm. Tocopherols have absorption maxima between 292 and 300 nm. Chromatograms are recorded using a computer data system. Analytes are quantified by external standard quantitation using standards to calculate response factors based on the peak area of the analyte. The quantities of analytes are corrected for recovery post-run based upon tocol asan internal standard.

Laboratory testing changed from 2001-2002 and 2003-2004. The National Center for Environmental Health, Centers for Disease & Prevention performed the testing in 2001-2002. Craft Technologies performed the testing in 2003-2004. Craft Technologies measured more analytes in 2003-2004 than theNational Center for Environmental Health, Centers for Disease & Prevention measured in 2001-2002. See the codebooks on the NHANES website for the different tests between the two laboratories.

The age group in which these measurements were made changed from 2001-2002 to 2003-2004. Serum concentrations of vitamin A, vitamin E and carotenoids were tested on participants 3 years and older in 2001- 2002 and on participants 6 years and older in 2003-2004.

The variable names and/or label descriptors changed from 2001-2002 to 2003-2004 for vitamin E and lutein/zeaxanthin. Also, additional analytes were tested in 2003-2004. The following pairs of test names or codes are used synonymously; vitamin E and α-tocopherol; and vitamin A and retinol. The variable names for vitamin E/α-tocopherol changed from LBXVIE/LBDVIESI in 2001-2002 to LBXATC/LBDATCSI in 2003-2004.

The variable name and label descriptor for lutein (LBXLUT/LBXLUTSI) in the 2002 and earlier data is equivalent to the variable name “combined lutein/zeaxanthin” (LBXLUZ/LBXLUZSI) in the 2003-2004 data. This is because the lutein peak in the CDC method included both lutein and zeaxanthin.

Serum concentrations of α-cryptoxanthin (LBXACY/LBDACYSI), δ- tocopherol(LBXDTC/LBDDTCSI), cis-lycopene (LBXCLC/LBDCLCSI), total lycopene (LBXLCC/LBDLCCSI), lutein (LBXLUT/LBDLUTSI), phytofluene (LBXPHF/LBDPHFSI), phytoene (LBXPHE/LBDPHESI),
and zeaxanthin (LBXZEA/LBDZEASI) were measured in 2003-2004, but not in 2001-2002.

A detailed description of the laboratory method used can be found on the NHANES website.

Data Processing and Editing

Serum specimens were processed, stored, and shipped to CTI in Wilson, NC for analysis.

Detailed specimen collection and processing instructions are discussed in the NHANES LPM. Vials werestored under appropriate frozen (–20°C) conditions until they were shipped to CTI.

Twenty-one derived variables were created in this data file. The formula for its derivatization is as follows:

The α-tocopherol (Vitamin E) results in ug/dL were converted into umol/L by multiplying by 0.02322.

The α-carotene results in ug/dL were converted into umol/L by multiplying by 0.01863 .

The α-cryptoxanthin results in ug/dL were converted into umol/L by multiplying by 0.01810.

The trans-β-carotene results in ug/dL were converted into umol/L by multiplying by 0.01863.

The total β-carotene results in ug/dL were converted into umol/L by multiplying by 0.01863 .

The cis-β carotene results in ug/dL were converted into umol/L by multiplying by 0.01863 .

The cis-lycopene results in ug/dL were converted into umol/L by multiplying by 0.01863.

The cis-lutein/zeaxanthin results in ug/dL were converted into umol/L by multiplying by 0.01758.

The β-cryptoxanthin results in ug/dL were converted into umol/L by multiplying by 0.01810.

The δ-tocopherol results in ug/dL were converted into umol/L by multiplying by 0.02485

The γ-tocopherol results in ug/dL were converted into umol/L by multiplying by 0.02402

The total lycopene results in ug/dL were converted into umol/L by multiplying by 0.01863

The lutein results in ug/dL were converted into umol/L by multiplying by 0.01758.

The combined lutein/zeaxanthin results in ug/dL were converted into umol/L by multiplying by 0.01758.

The trans-lycopene results in ug/dL were converted into umol/L by multiplying by 0.01863.

The phytofluene results in ug/dL were converted into umol/L by multiplying by 0.01843.

The phytoene results in ug/dL were converted into umol/L by multiplying by 0.01837.

The retinyl palmitate results in ug/dL were converted into umol/L by multiplying by 0.03491.

The retinyl stearate results in ug/dL were converted into umol/L by multiplying by 0.03491.

The vitamin A (retinol) results in ug/dL were converted into umol/L by multiplying by 0.03491.

The zeaxanthin results in ug/dL were converted into umol/L by multiplying by 0.01758.

Detailed instructions on specimen collection and processing can be found on the NHANES website.

Laboratory Quality Assurance and Monitoring

The NHANES quality assurance and quality control (QA/QC) protocols meet the 1988 Clinical Laboratory Improvement Act mandates. Detailed QA/QC instructions are discussed in the NHANES Laboratory/Medical Technologists Procedures Manual (LPM). Read the LABDOC file for detailed QA/QC protocols.

A detailed description of the quality assurance and quality control procedures can be found on the NHANES website.

Analytic Notes

The analysis of NHANES 2003–2004 laboratory data must be conducted with the key survey design and basic demographic variables. The NHANES 2003–2004 Household Questionnaire Data Files contain demographic data, health indicators, and other related information collected during household interviews. The Household Questionnaire Data Files also contain all survey design variables and sample weights required to analyze these data. The Phlebotomy Examination file includes auxiliary information on duration of fasting, the time of day of the venipuncture, and the conditions precluding venipuncture. The Household Questionnaire and Phlebotomy Exam files may be linked to the laboratory data file using the unique survey participant identifier SEQN.

Regression Analysis for 2001-2002 and 2003-2004 for Vitamins A, E, and Carotenoids:

In 2001-2002, Vitamins A, E and Carotenoids were analyzed using a HPLC method performed at CDC/NCEH [See Lab 6 in NHANES 2001-2002 for method details]. In 2003-2004, Vitamins A, E and Carotenoids were analyzed using a comparable HPLC method at Craft Technologies, Inc. (CTI). Crossover studies between CDC/NCEH and CTI were done in early 2003 and late 2004 and differences existed between the methods for some analytes. The following Deming regression analyses were performed to compare data from 2001-2002 to 2003-2004:

Early 2003 Deming Regression Analysis for A/E/Carotenoids Y(CDC)=X(CTI) in μg/dL
Test n Y(CDC)=X(CTI)  r2 
Alpha-Carotene 100 y = 0.9734x + 0.1847 0.9944
Trans-Beta-Carotene 100 y = 1.0764x - 0.0248 0.9971
 Cis-Beta-Carotene 100 y = 0.8017x - 0.0372 0.9685
 Beta-Cryptoxanthin 100 y = 1.1359x - 0.2116 0.9945
 Gamma-Tocopherol 100 y = 1.0346x - 8.5749 0.9818
 Lutein/Zeaxanthin 99 y = 0.9321x + 0.1231 0.9455
 Trans-Lycopene 100 y = 1.0719x - 0.1817 0.9947
Retinyl Palmitate 100 y = 1.0245x + 0.5039 0.1988
Retinyl Stearate 97 y = 0.803x - 0.0048 0.9807
Vitamin A 100 y = 0.9406x - 0.1199 0.9887
Vitamin E 100 y = 0.9541x - 22.231 0.9941

Late 2004 Deming Regression Analysis for A/E/Carotenoids Y(CDC)=X(CTI) in μg/dL
Test n Y(CDC)=X(CTI)  r2 
Alpha-Carotene 99 y = 0.9989x + 0.2204 0.9768
Trans-Beta-Carotene 98 y = 1.0275x + 1.2976 0.9960
 Cis-Beta-Carotene 99 y = 0.7154x + 0.1344 0.9826
 Beta-Cryptoxanthin 98 y = 1.0824x - 0.056 0.9696
 Gamma-Tocopherol 98 y = 1.0306x - 5.523 0.9922
 Lutein/Zeaxanthin 99 y = 1.1082x - 1.602 0.9141
 Trans-Lycopene 98 y = 1.0971x + 0.0645 0.9737
Retinyl Palmitate 98 y = 0.7989x + 1.2106 0.8845
Retinyl Stearate 98 y = 0.7681x + 0.1483 0.9621
Vitamin A 99 y = 0.9806x + 0.2901 0.9934
Vitamin E 98 y = 0.93x + 22.614 0.9905

Combined Deming Regression Analysis for A/E/Carotenoids Y(CDC)=X(CTI) in μg/dL
Test n Y(CDC)=X(CTI)  r2 
Alpha-Carotene 199 y = 0.9837x + 0.2137 0.9877
Trans-Beta-Carotene 198 y = 1.0339x + 0.8812 0.9960
 Cis-Beta-Carotene 199 y = 0.7232x + 0.0879 0.9815
 Beta-Cryptoxanthin 198 y = 1.0958x - 0.0542 0.9793
 Gamma-Tocopherol 198 y = 1.029x - 6.287 0.9893
Lutein/Zeaxanthin 198 y = 1.0641x - 1.2402 0.9225
 Trans-Lycopene 198 y = 1.0852x - 0.0681 0.9849
Retinyl Palmitate 198 y = 0.8227x + 0.99 0.7603
Retinyl Stearate 195 y = 0.7881x + 0.0711 0.9675
Vitamin A 199 y = 0.9805x - 1.0069 0.9871
Vitamin E 198 y = 0.9397x + 1.649 0.9914

The combined regression was performed using crossover data from early 2003 and late 2004. The data user may wish to apply regression formulas to compare results from 2001-2002 and 2003-2004.

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

LBXATC - a-Tocopherol(ug/dL)

Variable Name:
LBXATC
SAS Label:
a-Tocopherol(ug/dL)
English Text:
a-Tocopherol(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
39 to 7939 Range of Values 7266 7266
7 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBDATCSI - a-Tocopherol(umol/L)

Variable Name:
LBDATCSI
SAS Label:
a-Tocopherol(umol/L)
English Text:
a-Tocopherol(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.9056 to 184.3436 Range of Values 7266 7266
0.1625 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBXALC - a-Carotene(ug/dL)

Variable Name:
LBXALC
SAS Label:
a-Carotene(ug/dL)
English Text:
a-Carotene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.31 to 123.35 Range of Values 7198 7198
0.21 Fill Value of Limit of Detection 70 7268
. Missing 714 7982

LBDALCSI - a-Carotene(umol/L)

Variable Name:
LBDALCSI
SAS Label:
a-Carotene(umol/L)
English Text:
a-Carotene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0058 to 2.298 Range of Values 7198 7198
0.0039 Fill Value of Limit of Detection 70 7268
. Missing 714 7982

LBXACY - a-Cryptoxanthin(ug/dL)

Variable Name:
LBXACY
SAS Label:
a-Cryptoxanthin(ug/dL)
English Text:
a-Cryptoxanthin(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.22 to 14.21 Range of Values 7250 7250
0.14 Fill Value of Limit of Detection 18 7268
. Missing 714 7982

LBDACYSI - a-Cryptoxanthin(umol/L)

Variable Name:
LBDACYSI
SAS Label:
a-Cryptoxanthin(umol/L)
English Text:
a-Cryptoxanthin(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.004 to 0.2572 Range of Values 7250 7250
0.0025 Fill Value of Limit of Detection 18 7268
. Missing 714 7982

LBXBEC - trans-b-carotene(ug/dL)

Variable Name:
LBXBEC
SAS Label:
trans-b-carotene(ug/dL)
English Text:
trans-b-carotene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.43 to 388.19 Range of Values 7268 7268
. Missing 714 7982

LBDBECSI - trans-b-carotene(umol/L)

Variable Name:
LBDBECSI
SAS Label:
trans-b-carotene(umol/L)
English Text:
trans-b-carotene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.008 to 7.232 Range of Values 7268 7268
. Missing 714 7982

LBXBCC - total b-Carotene(ug/dL)

Variable Name:
LBXBCC
SAS Label:
total b-Carotene(ug/dL)
English Text:
total b-Carotene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.43 to 411.48 Range of Values 7268 7268
. Missing 714 7982

LBDBCCSI - total b-Carotene(umol/L)

Variable Name:
LBDBCCSI
SAS Label:
total b-Carotene(umol/L)
English Text:
total b-Carotene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.008 to 7.6659 Range of Values 7268 7268
. Missing 714 7982

LBXCBC - cis-b-carotene(ug/dL)

Variable Name:
LBXCBC
SAS Label:
cis-b-carotene(ug/dL)
English Text:
cis-b-carotene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3 to 23.28 Range of Values 6870 6870
0.21 Fill Value of Limit of Detection 398 7268
. Missing 714 7982

LBDCBCSI - cis-b-carotene(umol/L)

Variable Name:
LBDCBCSI
SAS Label:
cis-b-carotene(umol/L)
English Text:
cis-b-carotene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0056 to 0.4337 Range of Values 6870 6870
0.0039 Fill Value of Limit of Detection 398 7268
. Missing 714 7982

LBXCLC - cis-Lycopene(ug/dL)

Variable Name:
LBXCLC
SAS Label:
cis-Lycopene(ug/dL)
English Text:
cis-Lycopene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.4 to 93.63 Range of Values 7265 7265
0.21 Fill Value of Limit of Detection 3 7268
. Missing 714 7982

LBDCLCSI - cis-Lycopene(umol/L)

Variable Name:
LBDCLCSI
SAS Label:
cis-Lycopene(umol/L)
English Text:
cis-Lycopene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0075 to 1.7443 Range of Values 7265 7265
0.0039 Fill Value of Limit of Detection 3 7268
. Missing 714 7982

LBXCLZ - cis- Lutein/Zeaxanthin(ug/dL)

Variable Name:
LBXCLZ
SAS Label:
cis- Lutein/Zeaxanthin(ug/dL)
English Text:
cis- Lutein/Zeaxanthin(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.23 to 16.28 Range of Values 7262 7262
0.14 Fill Value of Limit of Detection 6 7268
. Missing 714 7982

LBDCLZSI - cis- Lutein/Zeaxanthin(umol/L)

Variable Name:
LBDCLZSI
SAS Label:
cis- Lutein/Zeaxanthin(umol/L)
English Text:
cis- Lutein/Zeaxanthin(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.004 to 0.2862 Range of Values 7262 7262
0.0025 Fill Value of Limit of Detection 6 7268
. Missing 714 7982

LBXCRY - b-cryptoxanthin(ug/dL)

Variable Name:
LBXCRY
SAS Label:
b-cryptoxanthin(ug/dL)
English Text:
b-cryptoxanthin(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.49 to 97.1 Range of Values 7252 7252
0.14 Fill Value of Limit of Detection 16 7268
. Missing 714 7982

LBDCRYSI - b-cryptoxanthin(umol/L)

Variable Name:
LBDCRYSI
SAS Label:
b-cryptoxanthin(umol/L)
English Text:
b-cryptoxanthin(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0089 to 1.7575 Range of Values 7252 7252
0.0025 Fill Value of Limit of Detection 16 7268
. Missing 714 7982

LBXDTC - d-Tocopherol(ug/dL)

Variable Name:
LBXDTC
SAS Label:
d-Tocopherol(ug/dL)
English Text:
d-Tocopherol(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3 to 126 Range of Values 5146 5146
2 Fill Value of Limit of Detection 2122 7268
. Missing 714 7982

LBDDTCSI - d-Tocopherol(umol/L)

Variable Name:
LBDDTCSI
SAS Label:
d-Tocopherol(umol/L)
English Text:
d-Tocopherol(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0746 to 3.1311 Range of Values 5146 5146
0.0497 Fill Value of Limit of Detection 2122 7268
. Missing 714 7982

LBXGTC - g-tocopherol(ug/dL)

Variable Name:
LBXGTC
SAS Label:
g-tocopherol(ug/dL)
English Text:
g-tocopherol(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
15 to 3122 Range of Values 7266 7266
7 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBDGTCSI - g-tocopherol(umol/L)

Variable Name:
LBDGTCSI
SAS Label:
g-tocopherol(umol/L)
English Text:
g-tocopherol(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.3603 to 74.9904 Range of Values 7266 7266
0.1681 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBXLCC - total Lycopene(ug/dL)

Variable Name:
LBXLCC
SAS Label:
total Lycopene(ug/dL)
English Text:
total Lycopene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.76 to 175.62 Range of Values 7266 7266
0.21 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBDLCCSI - total Lycopene(umol/L)

Variable Name:
LBDLCCSI
SAS Label:
total Lycopene(umol/L)
English Text:
total Lycopene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0142 to 3.2718 Range of Values 7266 7266
0.0039 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBXLUT - Lutein(ug/dL)

Variable Name:
LBXLUT
SAS Label:
Lutein(ug/dL)
English Text:
Lutein(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.38 to 88.18 Range of Values 7264 7264
0.14 Fill Value of Limit of Detection 4 7268
. Missing 714 7982

LBDLUTSI - Lutein(umol/L)

Variable Name:
LBDLUTSI
SAS Label:
Lutein(umol/L)
English Text:
Lutein(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0067 to 1.5502 Range of Values 7264 7264
0.0025 Fill Value of Limit of Detection 4 7268
. Missing 714 7982

LBXLUZ - Combined Lutein/zeaxanthin (ug/dL)

Variable Name:
LBXLUZ
SAS Label:
Combined Lutein/zeaxanthin (ug/dL)
English Text:
Combined Lutein/zeaxanthin (ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.57 to 113.05 Range of Values 7267 7267
0.14 Fill Value of Limit of Detection 1 7268
. Missing 714 7982

LBDLUZSI - Combined Lutein/zeaxanthin (umol/L)

Variable Name:
LBDLUZSI
SAS Label:
Combined Lutein/zeaxanthin (umol/L)
English Text:
Combined Lutein/zeaxanthin (umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.01 to 1.9874 Range of Values 7267 7267
0.0025 Fill Value of Limit of Detection 1 7268
. Missing 714 7982

LBXLYC - trans-lycopene(ug/dL)

Variable Name:
LBXLYC
SAS Label:
trans-lycopene(ug/dL)
English Text:
trans-lycopene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.34 to 81.99 Range of Values 7265 7265
0.21 Fill Value of Limit of Detection 3 7268
. Missing 714 7982

LBDLYCSI - trans-lycopene(umol/L)

Variable Name:
LBDLYCSI
SAS Label:
trans-lycopene(umol/L)
English Text:
trans-lycopene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0063 to 1.5275 Range of Values 7265 7265
0.0039 Fill Value of Limit of Detection 3 7268
. Missing 714 7982

LBXPHF - Phytofluene(ug/dL)

Variable Name:
LBXPHF
SAS Label:
Phytofluene(ug/dL)
English Text:
Phytofluene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.35 to 42.08 Range of Values 7209 7209
0.21 Fill Value of Limit of Detection 59 7268
. Missing 714 7982

LBDPHFSI - Phytofluene(umol/L)

Variable Name:
LBDPHFSI
SAS Label:
Phytofluene(umol/L)
English Text:
Phytofluene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0065 to 0.7755 Range of Values 7209 7209
0.0039 Fill Value of Limit of Detection 59 7268
. Missing 714 7982

LBXPHE - Phytoene(ug/dL)

Variable Name:
LBXPHE
SAS Label:
Phytoene(ug/dL)
English Text:
Phytoene(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.31 to 168.92 Range of Values 7174 7174
0.21 Fill Value of Limit of Detection 94 7268
. Missing 714 7982

LBDPHESI - Phytoene(umol/L)

Variable Name:
LBDPHESI
SAS Label:
Phytoene(umol/L)
English Text:
Phytoene(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0057 to 3.1031 Range of Values 7174 7174
0.0039 Fill Value of Limit of Detection 94 7268
. Missing 714 7982

LBXRPL - Retinyl palmitate(ug/dL)

Variable Name:
LBXRPL
SAS Label:
Retinyl palmitate(ug/dL)
English Text:
Retinyl palmitate(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.13 to 58.52 Range of Values 7127 7127
0.09 Fill Value of Limit of Detection 141 7268
. Missing 714 7982

LBDRPLSI - Retinyl palmitate(umol/L)

Variable Name:
LBDRPLSI
SAS Label:
Retinyl palmitate(umol/L)
English Text:
Retinyl palmitate(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0045 to 2.0429 Range of Values 7127 7127
0.0031 Fill Value of Limit of Detection 141 7268
. Missing 714 7982

LBXRST - Retinyl stearate(ug/dL)

Variable Name:
LBXRST
SAS Label:
Retinyl stearate(ug/dL)
English Text:
Retinyl stearate(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.11 to 13.01 Range of Values 4761 4761
0.08 Fill Value of Limit of Detection 2507 7268
. Missing 714 7982

LBDRSTSI - Retinyl stearate(umol/L)

Variable Name:
LBDRSTSI
SAS Label:
Retinyl stearate(umol/L)
English Text:
Retinyl stearate(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0038 to 0.4542 Range of Values 4761 4761
0.0028 Fill Value of Limit of Detection 2507 7268
. Missing 714 7982

LBXVIA - Retinol(ug/dL)

Variable Name:
LBXVIA
SAS Label:
Retinol(ug/dL)
English Text:
Retinol(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
6.31 to 164.6 Range of Values 7267 7267
0.21 Fill Value of Limit of Detection 1 7268
. Missing 714 7982

LBDVIASI - Retinol(umol/L)

Variable Name:
LBDVIASI
SAS Label:
Retinol(umol/L)
English Text:
Retinol(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.2203 to 5.7462 Range of Values 7267 7267
0.0073 Fill Value of Limit of Detection 1 7268
. Missing 714 7982

LBXZEA - Zeaxanthin(ug/dL)

Variable Name:
LBXZEA
SAS Label:
Zeaxanthin(ug/dL)
English Text:
Zeaxanthin(ug/dL)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.29 to 25.05 Range of Values 7266 7266
0.14 Fill Value of Limit of Detection 2 7268
. Missing 714 7982

LBDZEASI - Zeaxanthin(umol/L)

Variable Name:
LBDZEASI
SAS Label:
Zeaxanthin(umol/L)
English Text:
Zeaxanthin(umol/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.0051 to 0.4404 Range of Values 7266 7266
0.0025 Fill Value of Limit of Detection 2 7268
. Missing 714 7982