The dataset came from Department of Biostatistics, Vanderbilt University and the additional information on the survey coming from the National Center for Health Statistics (NCHS) of Centers for Disease Control and Prevention (CDC). The dataset is the survey result of the National Health and Nutrition Examination Survey (NHANES) conducted last 2009 to 2010. NHANES is a program of the NCHS designed to assess the health and nutritional status of adults and children in the United States.
Methodology for the survey is a combination of interviews and physical examinations. The interview includes demographic, socioeconomic, dietary, and health-related questions while the physical examination consists of medical, dental, physiological measurement, and laboratory tests administered by trained medical personnel.
Results of the survey are used to determine the prevalence of major diseases and risk factors for diseases as well as assess the nutritional status and its association with health promotion and disease prevention. In addition, findings are also used as a basis for national standards for height, weight, and blood pressure measurements. Lastly, data from the survey are also used for epidemiological studies and health sciences research for public health policy development, the design of health programs and services and expansion of health knowledge for the United States.
This survey began in the early 1960s and has been conducted as a series of surveys up to present time and focusing on different population groups or health topics.