Expanded Normal Weight Obesity and Insulin Resistance in US Adults of the National Health and Nutrition Examination Survey

Table 1

Expanded normal weight obesity (eNWO) categories, defined by BMI and body fat percentage status.

eNWO category	N, weighted %	Body mass index	Body fat % median
Underweight-low body fat	94, 1.9%	<18.5	Below
Underweight-high body fat	—	<18.5	Above
Normal weight-low body fat	1624, 30.1%	18.5–24.9	Below
Normal weight-high body fat	288, 4.5%	18.5–24.9	Above
Overweight-low body fat	927, 15.9%	25.0–29.9	Below
Overweight-high body fat	1221, 18.3%	25.0–29.9	Above
Obese-low body fat	141, 2.1%	≥30.0	Below
Obese-high body fat	1688, 27.2%	≥30.0	Above

Participants were divided according to body fat percentage based on the overall sex-specific median. Low body fat is defined as below the overall sex-specific median, and high body fat is defined as above the overall sex-specific median. Because the sample sizes for underweight-low and underweight-high were low, the two categories were merged to form one category, underweight. N represents the unweighted sample size, whereas weighted % represents the survey-weighted proportion of the total sample for each eNWO category. For weighted %, summing the values may not equal to 100% due to rounding. Primary focus should be on the proportions (%) because they represent the US population.