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KMID : 0388120020110020142
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Journal of Korean Society for the Study of Obesity
2002 Volume.11 No. 2 p.142 ~ p.149
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Neck Circumference as a Simple Obesity Index
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Kang Jee-Hyun
Yu Byung-Yeon
Seo Hi-Sun
Shim Kyung-Won
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Abstract
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Background : Neck circumference has been reported to be related to the other anthropometric measures of obesity and also associated with the metabolic disorders related to insulin resistance. The measurement of neck circumference could be useful in clinical screening for persons at an enhanced risk for insulin resistance. The aim of this study was to determine whether a single measure of neck circumference might be correlated with other obesity indices and HOMA score and to define neck circumference cutoff levels for obesity.
Methods : We examined 364 consecutive persons (199 men and 165 women), who visited konyang university hospital health examination center during August, 2002. To find the optimal, maximal sensitivity and specificity for neck circumference, the receiver output curve (ROC) analysis of cutoff points against BMI (25 kg/㎡) was performed using the test group (136 men and 113 women). We validated the cutoff level using validation group (63 men and 52 women). Other obesity indices and fasting glucose and insulin were measured to find the correlation between neck circumference.
Results : Neck circumference was significantly correlated with waist circumference, hip circumference, waist hip ratio, BMI, total body fat percent, fasting insulin and HOMA score. Neck circumference 36.6 cm for men and 32.3 cm for women was the best cutoff levels for determining the subjects with BMI over 25 kg/㎡. In the validation unrelated group, the test characteristics were acceptable with 91.9% sensitivity, 53.9% specificity, and 76.1% accuracy for men, and 81.25% sensitivity, 85% specificity, and 82.69% accuracy for women.
Conclusion : Neck circumference as a simple and easy screening method for obesity was strongly correlated with the other conventional obesity indices and HOMA score as a index of insulin resistance and we defined neck circumference cutoff level for obesity according existing BMI cutoff levels.
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KEYWORD
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Obesity, Neck circumference, Obesity indices, HOMA score
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