Table of Contents

Locator Record

Title: Urine Collection (Pregnancy) (UC_B )
Contact Number: 1-866-441-NCHS
Years of Content: 2001 - 2002
First Published: September, 2003
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Urine Collection (Pregnancy)
Record Source: NHANES 2001 - 2002
Survey Methodology: NHANES 2001 - 2002 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 dual energy x-ray absorptiometry (DXA) scan was performed on survey participants 8 years and older. The scan involves radiation exposure to the whole body. Pregnant women are excluded from the DXA , bioelectrical impedance and cardiovascular fitness components of the mobile examination center. Initially, a urine pregnancy test was performed. If the urine test results were positive, for pregnancy, a serum pregnancy test was also performed.

Eligible Sample

A pregnancy test was completed on female participants aged 12 to 59 years and menstruating females aged 8 to 11 years.

Description of Laboratory Methodology

The Iconr 25 hCG (Urine/Serum) test kit is a rapid chromatographic immunoassay for the qualitative detection of human chorionic gonadotropin (hCG) in urine or serum to aid in the early detection of pregnancy. The test utilizes a combination of monoclonal and polyclonal antibodies to selectively detect elevated levels of hCG in urine or serum.

Data Processing and Editing

Urine and serum specimens were tested in the NHANES mobile examination centers. Detailed specimen collection and processing instructions are discussed in the NHANES Laboratory/Medical Technologists Procedures Manual (LPM).

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). Read the LABDOC file for detailed QA/QC protocols.


Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Females only 8 YEARS - 59 YEARS

URXPREG - Pregnancy test result

Variable Name:
SAS Label:
Pregnancy test result
English Text:
Pregnancy test result
Females only 8 YEARS - 59 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 0 0
1 Positive 339 339
2 Negative 2659 2998
3 Not done 32 3030
4 Invalid 0 3030
. Missing 52 3082