Table of Contents

Locator Record

Title: Allergen Specific IgE(s) and Total IgE in Serum (AL_IGE_D )
Contact Number: 1-866-441-NCHS
Years of Content: 2005 - 2006
First Published: February, 2009
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Allergen Specific IgE(s) and Total IgE in Serum
Record Source: NHANES 2005 - 2006
Survey Methodology: NHANES 2005 - 2006 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 primary purpose of the NHANES 2005-2006 Allergy Component is to study the effects of common indoor allergens on allergic sensitization in the general U.S. population. A nationally representative sample of household dust was collected to measure the amounts of common indoor allergens present which may be related to asthma and other allergic disease. A blood sample was also drawn at the NHANES examination site for IgE allergy antibody testing. The IgE studies, as a part of Allergy Component, measured both total IgE and also allergen-specific IgE responses to the same panel of allergens measured in the household dust collection. Also, IgE testing was performed for a panel of outdoor aeroallergens and for selected foods. IgE testing specific to these indoor, outdoor, and food allergens had not been previously performed in NHANES surveys.

The overall NHANES 2005-2006 Allergy Component is designed to assess the allergen exposure, allergic sensitization, allergic symptoms and diseases, and their complex relationship in the general U.S. population. It consists of three parts: 1) collecting self-reported allergic diseases information through household interview questionnaires; 2) analyzing allergen and endotoxin from the dust extract; and 3) measuring total and allergen-specific immunoglobulin E (IgE) from a blood sample drawn at the NHANES mobile examination site).

Eligible Sample

A full sample of NHANES 2005-2006 participants' ages 1 year and older were eligible for total and allergen-specific serum IgE testing.

Description of Laboratory Methodology

Serum samples were analyzed for total and allergen-specific IgE using the Pharmacia Diagnostics ImmunoCAP 1000 System (Kalamazoo, Michigan). A detailed description of the laboratory method used can be found at NHANES 2005-2006 web page.

Total IgE Analysis Method:
Anti-IgE, covalently coupled to the ImmunoCap™ [1} reaction vessel, reacts with the total IgE in the sample. After washing, enzyme-labeled antibodies against IgE are added to form a complex. After incubation, unbound enzyme-anti-IgE is washed away and the bound complex is then incubated with a developing agent. After stopping the reaction, the fluorescence of the eluate is measured. The fluorescence is directly proportional with the concentration of IgE antibody in the sample. Test results are obtained by comparing the eluate fluorescence directly to the response for the calibrators.

Allergen-Specific IgE(s) Method:
The specific allergen of interest, covalently coupled to the ImmunoCap™ cellulose carrier (sponge), reacts with the allergen-specific IgE in the participant serum sample. After washing away non-specific IgE, enzyme-labeled antibodies against IgE are added to form a complex. After incubation, unbound anti-IgE is washed away and the remaining bound complex is incubated with a developing agent. After stopping the reaction, the sponge is compressed and the fluorescence of the resulting eluate is measured. The higher the response value, the more allergen-specific IgE is present in the sample. To evaluate the test results, the response for the patient samples is compared directly to the response for the calibrators.

Prior to the NHANES 2005-2006 survey, the only allergen-specific IgE serum testing was to latex antigen (NHANES III, NHANES 1999-2001) The blood sample collection for total and allergen-specific IgE for household, outdoor and food allergens was limited only to the NHANES 2005-2006 survey cycle, and did not continue in 2007.

The number and type of allergen-specific IgE tests performed varied by age. In the 2005-2006 survey, a basic subset of allergen-specific IgE antibodies were measured for all participants ages 1+ year (Group 1). Because a greater volume of blood could be drawn on older children and adults, the group of participant's ages 6+ years had an additional list of allergen-specific IgE antibodies tested (Group 2).

Group 1 Listing of Analytes (1 Year and Older)
 Variable Name  Test Name
LBXIGE Serum total IgE antibody (kU/L)
LBXID2 D. Farinae IgE antibody (kU/L)
LBXID1 D. Pteronyssinus IgE antibody (kU/L)
LBXIE1 Cat IgE antibody (kU/L)
LBXIE5 Dog IgE antibody (kU/L)
LBXII6 Cockroach IgE antibody (kU/L)
LBXIM6 Alternaria IgE antibody (kU/L)
LBXF13 Peanut IgE antibody (kU/L)
LBXIF1 Egg IgE antibody (kU/L)
LBXIF2 Milk IgE antibody (kU/L)

Group2 Listing of Analytes (6 Years and Older)
Variable Name  Test Name
LBXIW1 Ragweed IgE antibody (kU/L)
LBXIG5 Rye grass IgE antibody (kU/L)
LBXIG2 Bermuda grass IgE antibody (kU/L)
LBXIT7 Oak IgE antibody (kU/L)
LBXIT3 Birch IgE antibody (kU/L)
LBXF24 ShrimpIgE antibody (kU/L)
LBXIM3 Aspergillus IgE antibody (kU/L)
LBXW11 Thistle IgE antibody (kU/L)
LBXE72 Mouse IgE antibody (kU/L)
LBXE74 Rat IgE antibody (kU/L)

 

Data Processing and Editing

Blood specimens are processed, stored and shipped to Elmhurst Memorial Hospital, Chicago, Illinois. Detailed specimen collection and processing instructions are discussed in the NHANES Laboratory/Medical Technologists Procedures Manual (LPM). Read the LABDOC file for detailed data processing and editing protocols. The analytical methods are described in the Analytic methodology section.

During the data editing process, data distributions and outlier values were examined. Since there was not sufficient information to conclude that any specific measurements were invalid, they were not excluded from the data set. For samples below the LLOD, fill values equal to the LLOD divided by the square root of 2 are used in the public release dataset. See the NHANES web page link to for more specifics on “below detectable limit fill values” for this data.

Detection Limits:

Lower Limit of Detection (LLOD):
For total serum IgE measurement, the LLOD is equal to 2.00 kU/L. The LLOD was the same for the each of the allergen-specific IgE antibody tests, and equal to 0.35 kU/L.

Upper Limit of Detection (ULOD):
For total serum IgE measurement, all specimens obtained were analyzable, and there was no ULOD reported. The ULOD was the same for the each of the allergen-specific IgE antibody tests, and equal to 1000 kU/L.

Two variables are provided for each IGE analyte (total and allergen-specific). The variable naming convention “LBD___LC” (with the underscore filled by an allergen-specific code) indicates whether the result was either measurable, below the LLOD or above the ULOD. There are three values: “0”, “1”, and “2”. A “0” value means that the result was measurable. A “1” indicates that the result was below the LLOD. A “2” indicates that the result was above the ULOD.

The other variable type, prefixed “LBX___ “, provides the analytic result for that analyte.

Detailed instructions on specimen collection and processing can be found at NHANES web page. 

Laboratory Quality Assurance and Monitoring

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

Analytic Notes

The analysis of NHANES 2005-2006 laboratory data including the AL_IGE_D data files must be conducted with the key survey design variables and weights, the basic demographic variables, and with related household, laboratory, and co-morbidity data. The NHANES 2005-2006 participant Household Interview Questionnaire Data Files contain demographic data, and health indicators such as allergy and asthma history (AGQ, RDQ, MCQ). The Family Interview data file contains data on housing characteristics and the home environment. The household dust laboratory data file contains data on the amount of specific allergen detected in the participant’s household dust sample. The phlebotomy file includes auxiliary information such as the conditions precluding venipuncture.

Analytic Note on the sum of specific IgE test values exceeding the total IgE:

For NHANES 2005-2006 IgE measurements, there were specific participants for whom the sum of their specific IgE test values exceeded their measured total IgE value. This may occur because of the cross-reactivity of specific IgE antibodies to either shared or conformationally similar epitopes of antigens for the allergens [2-5]. For example, trees, grasses, or dust mites have cross-reacting antibodies. The researcher is cautioned in the interpretation of these cross-reacting specific IgE measurements.

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 1 YEARS - 150 YEARS

LBXIGE - Serum total IgE antibody (kU/L)

Variable Name:
LBXIGE
SAS Label:
Serum total IgE antibody (kU/L)
English Text:
Serum Total IgE antibody, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.41 to 16148 Range of Values 8336 8336
. Missing 1104 9440

LBDIGELC - Serum total IgE antibody comment code

Variable Name:
LBDIGELC
SAS Label:
Serum total IgE antibody comment code
English Text:
Serum total IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 8176 8176
1 Below lower detection limit 160 8336
2 Above upper detection limit 0 8336
. Missing 1104 9440

LBXID2 - D. Farinae IgE antibody (kU/L)

Variable Name:
LBXID2
SAS Label:
D. Farinae IgE antibody (kU/L)
English Text:
Serum IgE antibody to Dermatophagoides Farinae, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 1000 Range of Values 8258 8258
. Missing 1182 9440

LBDID2LC - D. Farinae IgE antibody comment code

Variable Name:
LBDID2LC
SAS Label:
D. Farinae IgE antibody comment code
English Text:
D. Farinae IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1642 1642
1 Below lower detection limit 6615 8257
2 Above upper detection limit 1 8258
. Missing 1182 9440

LBXID1 - D. Pteronyssinus IgE antibody (kU/L)

Variable Name:
LBXID1
SAS Label:
D. Pteronyssinus IgE antibody (kU/L)
English Text:
Serum IgE antibody to Dermatophagoides Pteronyssinus, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 1000 Range of Values 8336 8336
. Missing 1104 9440

LBDID1LC - D. Pteronyssin IgE antibody comment code

Variable Name:
LBDID1LC
SAS Label:
D. Pteronyssin IgE antibody comment code
English Text:
D. Pteronyssin IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1673 1673
1 Below lower detection limit 6661 8334
2 Above upper detection limit 2 8336
. Missing 1104 9440

LBXIE1 - Cat IgE antibody (kU/L)

Variable Name:
LBXIE1
SAS Label:
Cat IgE antibody (kU/L)
English Text:
Serum IgE antibody to Cat Epithelium and Dander, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 476 Range of Values 8335 8335
. Missing 1105 9440

LBDIE1LC - Cat IgE antibody comment code

Variable Name:
LBDIE1LC
SAS Label:
Cat IgE antibody comment code
English Text:
Cat IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 931 931
1 Below lower detection limit 7404 8335
2 Above upper detection limit 0 8335
. Missing 1105 9440

LBXIE5 - Dog IgE antibody (kU/L)

Variable Name:
LBXIE5
SAS Label:
Dog IgE antibody (kU/L)
English Text:
Serum IgE antibody to Dog Dander, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 558 Range of Values 8327 8327
. Missing 1113 9440

LBDIE5LC - Dog IgE antibody comment code

Variable Name:
LBDIE5LC
SAS Label:
Dog IgE antibody comment code
English Text:
Dog IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1009 1009
1 Below lower detection limit 7318 8327
2 Above upper detection limit 0 8327
. Missing 1113 9440

LBXII6 - Cockroach IgE antibody (kU/L)

Variable Name:
LBXII6
SAS Label:
Cockroach IgE antibody (kU/L)
English Text:
Serum IgE antibody to German Cockroach, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 204 Range of Values 8319 8319
. Missing 1121 9440

LBDII6LC - Cockroach IgE antibody comment code

Variable Name:
LBDII6LC
SAS Label:
Cockroach IgE antibody comment code
English Text:
Cockroach IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1057 1057
1 Below lower detection limit 7262 8319
2 Above upper detection limit 0 8319
. Missing 1121 9440

LBXIM6 - Alternaria IgE antibody (kU/L)

Variable Name:
LBXIM6
SAS Label:
Alternaria IgE antibody (kU/L)
English Text:
Serum IgE antibody to Alternaria Alternata, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 179 Range of Values 8288 8288
. Missing 1152 9440

LBDIM6LC - Alternaria IgE comment code

Variable Name:
LBDIM6LC
SAS Label:
Alternaria IgE comment code
English Text:
Alternaria IgE comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 779 779
1 Below lower detection limit 7509 8288
2 Above upper detection limit 0 8288
. Missing 1152 9440

LBXF13 - Peanut IgE antibody (kU/L)

Variable Name:
LBXF13
SAS Label:
Peanut IgE antibody (kU/L)
English Text:
Serum IgE antibody to Peanut, result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 1000 Range of Values 8306 8306
. Missing 1134 9440

LBDF13LC - Peanut IgE antibody comment code

Variable Name:
LBDF13LC
SAS Label:
Peanut IgE antibody comment code
English Text:
Peanut IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 775 775
1 Below lower detection limit 7530 8305
2 Above upper detection limit 1 8306
. Missing 1134 9440

LBXIF1 - Egg IgE antibody (kU/L)

Variable Name:
LBXIF1
SAS Label:
Egg IgE antibody (kU/L)
English Text:
Serum IgE antibody to Egg , result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 47.7 Range of Values 8295 8295
. Missing 1145 9440

LBDIF1LC - Egg IgE antibody comment code

Variable Name:
LBDIF1LC
SAS Label:
Egg IgE antibody comment code
English Text:
Egg IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 375 375
1 Below lower detection limit 7920 8295
2 Above upper detection limit 0 8295
. Missing 1145 9440

LBXIF2 - Milk IgE antibody (kU/L)

Variable Name:
LBXIF2
SAS Label:
Milk IgE antibody (kU/L)
English Text:
Serum IgE antibody to Milk , result (kU/L)
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 45.6 Range of Values 8207 8207
. Missing 1233 9440

LBDIF2LC - Milk IgE antibody comment code

Variable Name:
LBDIF2LC
SAS Label:
Milk IgE antibody comment code
English Text:
Milk IgE antibody comment code
Target:
Both males and females 1 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 651 651
1 Below lower detection limit 7556 8207
2 Above upper detection limit 0 8207
. Missing 1233 9440

LBXIW1 - Ragweed IgE antibody (kU/L)

Variable Name:
LBXIW1
SAS Label:
Ragweed IgE antibody (kU/L)
English Text:
Serum IgE antibody to Common Ragweed, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 469 Range of Values 7386 7386
. Missing 2054 9440

LBDIW1LC - Ragweed IgE antibody comment code

Variable Name:
LBDIW1LC
SAS Label:
Ragweed IgE antibody comment code
English Text:
Ragweed IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1281 1281
1 Below lower detection limit 6105 7386
2 Above upper detection limit 0 7386
. Missing 2054 9440

LBXIG5 - Rye grass IgE antibody (kU/L)

Variable Name:
LBXIG5
SAS Label:
Rye grass IgE antibody (kU/L)
English Text:
Serum IgE antibody to Rye Grass, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 1000 Range of Values 7384 7384
. Missing 2056 9440

LBDIG5LC - Rye grass IgE antibody comment code

Variable Name:
LBDIG5LC
SAS Label:
Rye grass IgE antibody comment code
English Text:
Rye grass IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1678 1678
1 Below lower detection limit 5705 7383
2 Above upper detection limit 1 7384
. Missing 2056 9440

LBXIG2 - Bermuda grass IgE antibody (kU/L)

Variable Name:
LBXIG2
SAS Label:
Bermuda grass IgE antibody (kU/L)
English Text:
Serum IgE antibody to Bermuda Grass, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 1000 Range of Values 7384 7384
. Missing 2056 9440

LBDIG2LC - Bermuda grass IgE antibody comment code

Variable Name:
LBDIG2LC
SAS Label:
Bermuda grass IgE antibody comment code
English Text:
Bermuda grass IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 1304 1304
1 Below lower detection limit 6079 7383
2 Above upper detection limit 1 7384
. Missing 2056 9440

LBXIT7 - Oak IgE antibody (kU/L)

Variable Name:
LBXIT7
SAS Label:
Oak IgE antibody (kU/L)
English Text:
Serum IgE antibody to White Oak, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 445 Range of Values 7382 7382
. Missing 2058 9440

LBDIT7LC - Oak IgE antibody comment code

Variable Name:
LBDIT7LC
SAS Label:
Oak IgE antibody comment code
English Text:
Oak IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 969 969
1 Below lower detection limit 6413 7382
2 Above upper detection limit 0 7382
. Missing 2058 9440

LBXIT3 - Birch IgE antibody (kU/L)

Variable Name:
LBXIT3
SAS Label:
Birch IgE antibody (kU/L)
English Text:
Serum IgE antibody to Birch Tree, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 879 Range of Values 7381 7381
. Missing 2059 9440

LBDIT3LC - Birch IgE antibody comment code

Variable Name:
LBDIT3LC
SAS Label:
Birch IgE antibody comment code
English Text:
Birch IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 812 812
1 Below lower detection limit 6569 7381
2 Above upper detection limit 0 7381
. Missing 2059 9440

LBXF24 - Shrimp IgE antibody (kU/L)

Variable Name:
LBXF24
SAS Label:
Shrimp IgE antibody (kU/L)
English Text:
Serum IgE antibody to Shrimp, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 322 Range of Values 7377 7377
. Missing 2063 9440

LBDF24LC - Shrimp IgE antibody comment code

Variable Name:
LBDF24LC
SAS Label:
Shrimp IgE antibody comment code
English Text:
Shrimp IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 577 577
1 Below lower detection limit 6800 7377
2 Above upper detection limit 0 7377
. Missing 2063 9440

LBXIM3 - Aspergillus IgE antibody (kU/L)

Variable Name:
LBXIM3
SAS Label:
Aspergillus IgE antibody (kU/L)
English Text:
Serum IgE antibody to Aspergillus Fumigatus, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 62.3 Range of Values 7376 7376
. Missing 2064 9440

LBDIM3LC - Aspergillus IgE comment code

Variable Name:
LBDIM3LC
SAS Label:
Aspergillus IgE comment code
English Text:
Aspergillus IgE comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 634 634
1 Below lower detection limit 6742 7376
2 Above upper detection limit 0 7376
. Missing 2064 9440

LBXW11 - Thistle IgE antibody (kU/L)

Variable Name:
LBXW11
SAS Label:
Thistle IgE antibody (kU/L)
English Text:
Serum IgE antibody to Russian Thistle, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 275 Range of Values 7370 7370
. Missing 2070 9440

LBDW11LC - Thistle IgE antibody comment code

Variable Name:
LBDW11LC
SAS Label:
Thistle IgE antibody comment code
English Text:
Thistle IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 964 964
1 Below lower detection limit 6406 7370
2 Above upper detection limit 0 7370
. Missing 2070 9440

LBXE72 - Mouse IgE antibody (kU/L)

Variable Name:
LBXE72
SAS Label:
Mouse IgE antibody (kU/L)
English Text:
Serum IgE antibody to mouse urine proteins, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 196 Range of Values 7356 7356
. Missing 2084 9440

LBDE72LC - Mouse IgE comment code

Variable Name:
LBDE72LC
SAS Label:
Mouse IgE comment code
English Text:
Mouse IgE comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 119 119
1 Below lower detection limit 7237 7356
2 Above upper detection limit 0 7356
. Missing 2084 9440

LBXE74 - Rat IgE antibody (kU/L)

Variable Name:
LBXE74
SAS Label:
Rat IgE antibody (kU/L)
English Text:
Serum IgE antibody to rat urine proteins, result (kU/L)
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.25 to 73.6 Range of Values 7333 7333
. Missing 2107 9440

LBDE74LC - Rat IgE antibody comment code

Variable Name:
LBDE74LC
SAS Label:
Rat IgE antibody comment code
English Text:
Rat IgE antibody comment code
Target:
Both males and females 6 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 At or above the detection limit 110 110
1 Below lower detection limit 7223 7333
2 Above upper detection limit 0 7333
. Missing 2107 9440