Comparisons of waist circumferences measured at 4 sites - PubMed (original) (raw)

doi: 10.1093/ajcn/77.2.379.

John C Thornton, Salina Bari, Bennett Williamson, Dympna Gallagher, Steven B Heymsfield, Mary Horlick, Donald Kotler, Blandine Laferrère, Laurel Mayer, F Xavier Pi-Sunyer, Richard N Pierson Jr

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Comparisons of waist circumferences measured at 4 sites

Jack Wang et al. Am J Clin Nutr. 2003 Feb.

Abstract

Background: Waist circumference (WC) is now accepted as a practical measure of adipose tissue distribution. Four body sites for WC measurements are commonly used, as follows: immediately below the lowest ribs (WC1), the narrowest waist (WC2), the midpoint between the lowest rib and the iliac crest (WC3), and immediately above the iliac crest (WC4).

Objective: We sought to compare the magnitude and reliability of WC measured at these 4 sites in males and females.

Design: WC was measured at each site 1 time in all subjects [49 males and 62 females, aged 7-83 y, with a body mass index (in kg/m(2)) of 9-43] and 3 times in a subgroup (n = 93) by one experienced observer using a heavy-duty inelastic tape. Body fat was measured in a subgroup (n = 74) with the use of dual-energy X-ray absorptiometry.

Results: The mean values of WC were WC2 < WC1 < WC3 < WC4 (P < 0.01) in females and WC2 < WC1, WC3, and WC4 (P < 0.01) in males. For all 4 sites, measurement reproducibility was high, with intraclass correlation (r) values > 0.99. WC values were significantly correlated with fatness; correlations with trunk fat were higher than correlations with total body fat in both sexes.

Conclusions: WC values at the 4 commonly used anatomic sites differ in magnitude depending on sex, are highly reproducible, and are correlated with total body and trunk adiposity in a sex-dependent manner. These observations have implications for the use of WC measurements in clinical practice and patient-oriented research.

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