The combined 2001-2006 NHANES sample includes 17,176 adults. Of these, 15,662 (91.2%) had BMI values based on physical measures of height and weight, and 16,579 (96.5%) had BMI values based on self-reported height and weight. For 15,161 (88.3%) adult NHANES participants, both self-reported and measured BMI indicators were available for analysis. Among these, 15,155 adults also provided responses to the question: "Have you EVER been told by a doctor or health professional that you have diabetes or sugar diabetes?" Response rates for the height and weight information were lower among older respondents (particular those over 70 years of age) and among Hispanics compared to whites and African Americans, largely due to lower response rates for the measured height and weight data. Gender differences were generally small, with men having slightly better response rates.
