How do I download NHANES data in SAS?
NHANES data files are available for download from the website as SAS transport files (. XPT). To use these files you need to create a directory to save them, download the data files and documentation, and then extract or import the datasets.
What are areas included in NHANES?
The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component consists of medical, dental, and physiological measurements, as well as laboratory tests administered by highly trained medical personnel.
What is the difference between NHANES I and NHANES II?
NHES I focused on selected chronic disease of adults aged 18-79. NHES II and NHES III focused on the growth and development of children. The NHES II sample included children aged 6-11, while NHES III focused on youths aged 12-17.
How do I get NHANES data?
Most of the NHANES data are publicly available and listed on the Questionnaires, Datasets, and Related Documentation page by survey cycle. For example, the NHANES 2017-2018 data can be located and downloaded for free by clicking NHANES 2017-2018.
What is the main purpose of NHANES?
NHANES is designed to assess the health and nutritional status of adults and children in the United States. The survey is unique in that it combines interviews, physical examinations, and administers tests of physical activity and fitness that include children and adolescents.
What kind of data is NHANES?
How accurate is NHANES?
Background: A single 2-year National Health and Nutrition Examination Survey (NHANES) cycle is designed to provide accurate and stable estimates of conditions with prevalence of at least 10%.
How are NHANES participants selected?
NHANES will contact the selected household and ask a short set of questions (age, race, and gender) about everyone in the household. A computer process randomly selects some, all, or none of the household members.
What is NHANES III?
The third National Health and Nutrition Examination Survey (NHANES III), conducted in 1988-1994, was designed to obtain nationally representative information on the health and nutritional status of the population of the United States through interviews and direct physical examinations.
What are survey weights?
What is a Survey Weight? • A value assigned to each case in the data file. g • Normally used to make statistics computed from the data more representative of the population.