A urine test was performed on survey participants 8 years and older. If the urine pregnancy test is positive on any female participants aged 8 -17 years, the result is confirmed using a serum test. All positive test results excluded pregnant women from the DXA and cardiovascular fitness components of the mobile examination center.
A pregnancy test was completed on female participants aged 12–59 years and menstruating females aged 8–11 years.
The Icon 25 hCG test kit (Beckman Coulter) 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.
A detailed description of the laboratory method used can be found on the NHANES website.
Urine and serum specimens were tested in the NHANES mobile examination centers. Detailed specimen collection and processing instructions are discussed in the NHANES LPM.
Detailed instructions on specimen collection and processing can be found on the NHANES website.
The NHANES quality control and quality assurance protocols (QA/QC) meet the 1988 Clinical Laboratory Improvement Amendments 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.
A detailed description of the quality assurance and quality control procedures can be found on the NHANES website.
A pregnancy test was completed on female participants aged 12–59 and menstruating females aged 8–11 years.
| Code or Value | Value Description | Count | Cumulative | Skip to Item |
|---|---|---|---|---|
| 1 | Positive | 367 | 367 | |
| 2 | Negative | 2485 | 2852 | |
| 3 | Not done | 58 | 2910 | |
| 4 | Invalid | 0 | 2910 | |
| . | Missing | 1 | 2911 |