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KMID : 0388120020110020115
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Journal of Korean Society for the Study of Obesity
2002 Volume.11 No. 2 p.115 ~ p.122
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Accuracy of Waist Circumference and Waist-hip Ratio Measured by In Body 3.0
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Jeong Young-Jin
Park Ji-Young
Cha Ki-Chul
Park Hye-Soon
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Abstract
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Background : Assessment of waist circumference is being emphasized for the evaluation of fat distribution. InBody 3.0, a body composition analyzer device, automatically measures waist circumference, hip circumference, and waist-hip ration (WHR), thus its results are widely utilized due to its convenience. The purpose of this study was to assess the accuracy of the waist circumference, hip circumference, and WHR measurements obtained through InBody 3.0.
Method : The participants involved 345 patients who visited the obesity clinic in a hospital and had been evaluated by InBody 3.0. Waist circumference (midpoint between the lower border of the rib cage and the iliac crest; umbilical level; top of the iliac crest) and hip circumference ( the widest area of the buttock) were measured manually by a single trained personnel. The waist, hip circumferences, and WHR obtained by InBody 3.0 were compared with the waist, hip circumferences, and WHR obtained by manual unelastic tape measurement.
Results : The waist circumference obtained by InBody 3.0 was significantly greater than the manually measured values at three different levels by 7.81±5.72 cm, 4.20±6.51 cm, 4.68±5.99 cm; waist to hip ration was also shown to be greater by 0.067±0.060, 0.031±0.063, 0.036±0.060 at each levels of waist measurement and this difference increased in proportion to BMI of the subjects (p<0.05). The false positive rate for assessment of abdominal obesity by the In Body 3.0 was 7 ~ 17% presuming that the abdominal obesity according to manual measurement of waist circumference and WHR were golden standards.
Conclusion : Despite the convenience of the automatic measurement of waist circumference and WHR obtained by InBody 3.0, it had a tendency to overestimate the values. The importance of manual tape measurement in order to accurately evaluate fat distribution and abdominal obesity must be emphasized.
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KEYWORD
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Waist circumference, Waist to hip ratio, Accuracy, Body composition analyzer
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