The current National Health and Nutrition Examination Survey (NHANES) is a continuous program starting in 1999. The survey interviews and examines a nationally representative sample of 5,000 persons each year. These persons are located in counties across the country, 15 of which are visited each year. No geographic location was released in order to protect the identification of respondents for the NHANES survey. State and county information could be obtained through the Research Data Center (RDC). It is desirable, however, to use a finer level of geography to spatially analyze the NHANES data and to answer various important research questions about the effect of geography on health.
Therefore, National Center for Health Statistics (NCHS) entered into an agreement with U.S. Department of Housing and Urban Development (HUD) to use its geocoding services to assign geographic codes to the NHANES address data. HUD geocoded the 1999-2016 NHANES survey data to the 2000 and 2010 censuses, respectively.
All survey participants have a geocoded record.
NHANES collects residential household information for unique addresses of households containing at least one survey participant.
After geocoding the NHANES survey data HUD provides QC documentation (see Appendix 1).
The NHANES’ participants address data was submitted to HUD and using Geocode Service Center (GSC), was geo-enabled with latitude/longitude coordinates and other legal, statistical, and administrative geographies including census, postal, and other attributes.
Due to disclosure issues, this dataset is not available publicly. Access may be obtained through the NCHS Research Data Center (https://www.cdc.gov/rdc).
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