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The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians
BACKGROUND: The study was conducted to examine the comparability of the BMI and Gallagher’s classification in diagnosing obesity based on the cutoff points of the gold standards and to estimate suitable cutoff points for detecting obesity among Iranians. METHODS: The cross-sectional study was compar...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Iranian Journal of Medical Sciences
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4912647/ https://www.ncbi.nlm.nih.gov/pubmed/27365550 |
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author | Jahanlou, Alireza Shahab Kouzekanani, Kamiar |
author_facet | Jahanlou, Alireza Shahab Kouzekanani, Kamiar |
author_sort | Jahanlou, Alireza Shahab |
collection | PubMed |
description | BACKGROUND: The study was conducted to examine the comparability of the BMI and Gallagher’s classification in diagnosing obesity based on the cutoff points of the gold standards and to estimate suitable cutoff points for detecting obesity among Iranians. METHODS: The cross-sectional study was comparative in nature. The sample consisted of 20,163 adults. The bioelectrical impedance analysis (BIA) was used to measure the variables of interest. Sensitivity, specificity, positive predictive power (PPV), and negative predictive power (NPV) were used to evaluate the comparability of the two classification methods in detecting obesity. RESULTS: The BMI wrongly classified 29% of the obese persons as overweight. In both classifications, as age increased, the accuracy of detecting obesity decreased. The Gallagher’s classification is better than MBI in detecting obesity in men with the exception of those older than 59 years. In females, the BMI was better in determining sensitivity. In both classifications, either female or male, an increase in age was associated with a decrease in sensitivity and NPV with the exception of the BMI for the 18 year olds. Gallagher can correctly classify males and females who are less than 40 and 19 years old, respectively. CONCLUSION: Gallagher’s classification is recommended for non-obese in both sexes and in obese males younger than 40 years old. The BMI is recommended for obese females. The suitable cutoff points for the BMI to detect obesity are 27.70 kg/m(2) for females and males, 27.70 kg/m(2) for females, and 27.30 kg/m(2) for males. |
format | Online Article Text |
id | pubmed-4912647 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Iranian Journal of Medical Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-49126472016-07-01 The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians Jahanlou, Alireza Shahab Kouzekanani, Kamiar Iran J Med Sci Original Article BACKGROUND: The study was conducted to examine the comparability of the BMI and Gallagher’s classification in diagnosing obesity based on the cutoff points of the gold standards and to estimate suitable cutoff points for detecting obesity among Iranians. METHODS: The cross-sectional study was comparative in nature. The sample consisted of 20,163 adults. The bioelectrical impedance analysis (BIA) was used to measure the variables of interest. Sensitivity, specificity, positive predictive power (PPV), and negative predictive power (NPV) were used to evaluate the comparability of the two classification methods in detecting obesity. RESULTS: The BMI wrongly classified 29% of the obese persons as overweight. In both classifications, as age increased, the accuracy of detecting obesity decreased. The Gallagher’s classification is better than MBI in detecting obesity in men with the exception of those older than 59 years. In females, the BMI was better in determining sensitivity. In both classifications, either female or male, an increase in age was associated with a decrease in sensitivity and NPV with the exception of the BMI for the 18 year olds. Gallagher can correctly classify males and females who are less than 40 and 19 years old, respectively. CONCLUSION: Gallagher’s classification is recommended for non-obese in both sexes and in obese males younger than 40 years old. The BMI is recommended for obese females. The suitable cutoff points for the BMI to detect obesity are 27.70 kg/m(2) for females and males, 27.70 kg/m(2) for females, and 27.30 kg/m(2) for males. Iranian Journal of Medical Sciences 2016-07 /pmc/articles/PMC4912647/ /pubmed/27365550 Text en Copyright: © Iranian Journal of Medical Sciences http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Jahanlou, Alireza Shahab Kouzekanani, Kamiar The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title | The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title_full | The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title_fullStr | The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title_full_unstemmed | The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title_short | The Accuracy of Body Mass Index and Gallagher’s Classification in Detecting Obesity among Iranians |
title_sort | accuracy of body mass index and gallagher’s classification in detecting obesity among iranians |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4912647/ https://www.ncbi.nlm.nih.gov/pubmed/27365550 |
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