Figure 1.

Percentage of sample within categories of self-reported body mass index (BMI) that were classified into the same, higher, or lower categories of measured BMI, National Health and Nutrition Examination Survey (NHANES) II (1976–1980), NHANES III (1988–1994), and Continuous NHANES (1999–2010), United States. A) Men. B) Women. Measured BMI was calculated from measured height and weight. Self-reported BMI was calculated from self-reported weight and height. The x-axis BMI categories are according to self-report. Within BMI categories, the first bar is for the full sample, and the second bar for the restricted sample. White: measured BMI category was the same as self-reported BMI category; striped: measured BMI category was lower than self-reported BMI category; gray: measured BMI category was 1 category higher than self-reported BMI category; black: measured BMI category was 2 categories higher than self-reported BMI category.