Figure 2From: Using maximum weight to redefine body mass index categories in studies of the mortality risks of obesity Kaplan Meier curves for categories of BMI at time of survey and at maximum. Categories of BMI are normal weight (18.5-25.0 kg/m2); overweight (25.0-29.9 kg/m2); obese class 1 (30.0-34.9 kg/m2); and obese class 2 (35.0 kg/m2 or greater). The sample includes persons ages 50-84 who never smoked. Entry years are 1988-2004 with mortality follow-up through 2006. Estimates are weighted and account for complex survey design. Source: National Health and Nutrition Examination Survey.Back to article page