Korean J Obes.
2006 Mar;15(1):1-9.
Cut-off Points of Waist Circumference for Defining Abdominal Obesity in the Korean Population
- Affiliations
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- 1Center for Obesity, Nutrition and Metabolism, Pusan National University Hospital, Korea. saylee@pnu.edu
- 2Department of Family Medicine, Ulsan University College of Medicine, Korea.
- 3Department of Family Medicine, Korea University College of Medicine, Korea.
- 4Department of Internal Medicine, The Catholic University of Korea, College of Medicine, Korea.
- 5Department of Family Medicine, Seoul Municipal Dong-Bu Hospital, Korea.
- 6Department of Internal Medicine, Ajou University, College of Medicine, Korea.
- 7Health Center, Guro-gu, Seoul, Korea.
- 8Department of Family Medicine, Eulji University College of Medicine, Korea.
- 9Department of Internal Medicine, Hallym University, College of Medicine, Korea.
- 10Department of Internal Medicine, Kyung Hee University, College of Medicine, Korea.
- 11Department of Internal Medicine, Hanyang University, College of Medicine, Korea.
- 12Department of Family Medicine, The Catholic University of Korea, College of Medicine, Korea.
- 13Department of Family Medicine, Ilsan Paik Hospital, Inje University, Korea.
- 14Department of Internal Medicine, Inha University, College of Medicine, Korea.
Abstract
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BACKGROUND: Recently, the International Diabetes Federation (IDF) consensus proposed a new definition for diagnosing metabolic syndrome. Ethnic-specific waist circumference (WC) cut-off points have been incorporated into the definition. Therefore, the study of the WC cut-off points for defining abdominal obesity in Koreans was performed by the Korean Society of the Study of Obesity.
METHODS
The data used for analysis was from the Korean National Health and Nutritional Examination Survey (KNHANES) performed in 1998 (involved 6562 participants), which is representative of nutritional health research in Korea. The 2005 International Diabetes Federation definition of the metabolic syndrome was applied. The reasonable cut-off points of WC for abdominal obesity in Koreans were set based on Receiver Operating Characteristics (ROC) curve, odds ratio and prevalence of abdominal obesity in the study population.
RESULTS
Using ROC analysis, the optimal WC to predict the risk factors of metabolic syndrome, such as high triglyceride levels, low levels of HDL-cholesterol, hypertension, and high glucose levels in Koreans, was 82~84 cm for men, and 79~82 cm for women. The odds ratio of having more than 2 metabolic abnormalities was about 5 in men with WC > 90 cm and in women with WC > 80 cm. WC in the 80th percentile in the Korean population is 90 cm and 86.5 cm for men and women, respectively.
CONCLUSIONS
The cut-off points of WC for abdominal obesity in Koreans are 90 cm for men and 85 cm for women, respectively. The cut-off points of waist circumference for defining abdominal obesity should be followed up by future additional studies and updated when new data becomes available.
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