Misclassification of Obesity by Body Mass Index Among Patients Receiving Hemodialysis  Piyawan Kittiskulnam, MD, Glenn M. Chertow, MD, MPH, George A. Kaysen, MD, PhD, Cynthia Delgado, MD, Lorien S. Dalrymple, MD, Kirsten L. Johansen, MD  American Journal of Kidney Diseases  Volume 67, Issue 4, Pages 709-711 (April 2016) DOI: 10.1053/j.ajkd.2015.09.028 Copyright © 2016 Terms and Conditions

Figure 1 Scatter plot between percent body fat and body mass index (BMI) in (1A) men and (1B) women and percent body fat and waist circumference in (1C) men and (1D) women. Dashed lines indicate cutoff points for the definition of obesity by each metric. The reference criterion is obesity based on percent body fat. Underidentification as obese was more frequent in women than men when using BMI (P=0.003) and in men than women when using waist circumference (P=0.03). The correlation between waist circumference and body fat (ρ=0.58) was slightly better than between BMI and body fat (ρ=0.57). In men, correlations of BMI with body fat and waist circumference with body fat were stronger than in women (ρ=0.61; P<0.001 and ρ=0.70; P<0.001 in men; ρ=0.59; P<0.001 and ρ=0.63; P<0.001 in women; P<0.05 for interactions with sex). American Journal of Kidney Diseases 2016 67, 709-711DOI: (10.1053/j.ajkd.2015.09.028) Copyright © 2016 Terms and Conditions