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Utility of waist circumference‐to‐height ratio as a screening tool for generalized and central obesity among Iranian children and adolescents: The CASPIAN‐V study
Author(s) -
Ejtahed HaniehSadat,
Kelishadi Roya,
Qorbani Mostafa,
Motlagh Mohammad Esmaeil,
HasaniRanjbar Shirin,
Angoorani Pooneh,
Beshtar Shaghayegh,
Ziaodini Hasan,
Taheri Majzoubeh,
Heshmat Ramin
Publication year - 2019
Publication title -
pediatric diabetes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.678
H-Index - 75
eISSN - 1399-5448
pISSN - 1399-543X
DOI - 10.1111/pedi.12855
Subject(s) - waist to height ratio , percentile , waist , medicine , body mass index , obesity , cutoff , anthropometry , receiver operating characteristic , demography , body volume index , circumference , pediatrics , classification of obesity , statistics , fat mass , mathematics , geometry , physics , quantum mechanics , sociology
Background Waist‐to‐height ratio (WHtR) is regarded as a simple anthropometric index for evaluating central adiposity because of its independence of age, gender, and ethnicity. Objective The purpose of this study was to determine the optimal WHtR cutoff value in screening obesity and to compare it with other obesity indicators including body mass index (BMI) and waist circumference (WC) in Iranian children and adolescents. Methods This large survey was conducted on 14 274 Iranian children and adolescents as a national school‐based surveillance study (CASPIAN) in 2015. The receiver operating characteristic curve analysis was performed to estimate the optimal cut‐off points of WHtR for the prediction of general and central obesity. The area under curve (AUC) was used to compare the ability of WHtR cut‐off points, BMI and WC percentiles to discriminate students with and without obesity according to age and sex. Results The optimal WHtR cutoff value for predicting general obesity was 0.49 and 0.48 for boys and girls, respectively and for central obesity according to WC ≥ 90th percentile was 0.50 for both genders. AUC values of WHtR for predicting general and central obesity were 87% and 96%, which indicates its strong predictive ability. For central obesity, the AUCs of WHtR were superior to those of WC percentiles. The kappa agreement coefficient was 0.55 between WC ≥ 90th percentile and WHtR ≥ 0.5. Conclusions The WHtR ≥ 0.5 as a simple and useful screening tool is better than WC, for predicting general and central obesity in different age and sex groups of Iranian children and adolescents.