Because Drs. Katz and Yelin are Editors of Arthritis Care & Research, review of this article was handled by the Editor of Arthritis & Rheumatism.
Systemic Lupus Erythematosus
Obesity and its measurement in a community-based sample of women with systemic lupus erythematosus
Version of Record online: 28 JAN 2011
Copyright © 2011 by the American College of Rheumatology
Arthritis Care & Research
Volume 63, Issue 2, pages 261–268, February 2011
How to Cite
Katz, P., Gregorich, S., Yazdany, J., Trupin, L., Julian, L., Yelin, E. and Criswell, L. A. (2011), Obesity and its measurement in a community-based sample of women with systemic lupus erythematosus. Arthritis Care Res, 63: 261–268. doi: 10.1002/acr.20343
- Issue online: 28 JAN 2011
- Version of Record online: 28 JAN 2011
- Accepted manuscript online: 7 SEP 2010 01:06PM EST
- Manuscript Accepted: 25 AUG 2010
- Manuscript Received: 2 JUN 2010
- National Institute of Arthritis and Musculoskeletal and Skin Diseases. Grant Number: P60-AR-053308
- National Center for Research Resources
- Clinical and Translational Science Institute
- University of California, San Francisco. Grant Number: UL-1-RR024131
To determine the prevalence of obesity and evaluate how accurately standard anthropometric measures identify obesity among women with systemic lupus erythematosus (SLE).
Dual x-ray absorptiometry (DXA), height, weight, and waist and hip circumference measurements were collected from 145 women with SLE. Three anthropometric proxies of obesity (body mass index [BMI] ≥30 kg/m2, waist circumference [WC] ≥88 cm, and waist:hip ratio [WHR] ≥0.85) were compared with a DXA-based obesity criterion. Correspondence between measures was assessed with Cohen's kappa. Receiver operating characteristic curves determined optimal cut points for each anthropometric measure relative to DXA. Framingham cardiovascular risk scores were compared among women who were classified as not obese by both traditional and revised anthropometric definitions, obese by both definitions, and obese only by the revised definition.
Of the 145 women, 28%, 29%, 41%, and 50% were classified as obese by WC, BMI, WHR, and DXA, respectively. Correspondence between anthropometric and DXA-based measures was moderate. Women misclassified by anthropometric measures had less truncal fat and more appendicular lean and fat mass. Cut points were identified for anthropometric measures to better approximate DXA estimates of percent body fat: BMI ≥26.8 kg/m2, WC ≥84.75 cm, and WHR ≥0.80. Framingham risk scores were significantly higher in women classified as obese by either traditional or revised criteria.
A large percentage of this group of women with SLE was obese. Substantial portions of women were misclassified by anthropometric measures. Utility of revised cut points compared with traditional cut points in identifying risk of cardiovascular disease or disability remains to be examined in prospective studies, but results from the Framingham risk score analysis suggest that traditional cut points exclude a significant number of at-risk women with SLE.