Ethnographic Study: NHANES III

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Method The study included participants of the National Health and Nutrition Examination Survey (NHANES III), conducted by the National Center for Health Statistics of the Centers for Disease Control and Prevention. NHANES III used a highly stratified multistage probability sampling and employed oversampling of the older people, non-Hispanic blacks and Mexican Americans. Descriptions of the survey, sampling procedures and details of the laboratory tests evaluated can be found on the Centers for Disease Control and Prevention website. The analysis was limited to only adults between the ages of 20-59 years. Persons younger than 20 years did not have plasma glucose testing and only participants up to 60 years old were asked about marijuana use,