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Acta Paediatr. 2018 Feb;107(2):307-314. doi: 10.1111/apa.14113. Epub 2017 Oct 27.

Severe obesity is a limitation for the use of body mass index standard deviation scores in children and adolescents.

Author information

1
Morbid Obesity Centre, Vestfold Hospital Trust, Tønsberg, Norway.
2
Department of Clinical Science, University of Bergen, Bergen, Norway.
3
Environment and Health, Department of Public Health and Primary Care, KU Leuven - University of Leuven, Leuven, Belgium.
4
Faculty of Medicine, University of Oslo, Oslo, Norway.
5
Department of Clinical Psychology, University of Bergen, Bergen, Norway.
6
Department of Endocrinology, Morbid Obesity and Preventive Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.

Abstract

AIM:

We analysed the distribution of the body mass index standard deviation scores (BMI-SDS) in children and adolescents seeking treatment for severe obesity, according to the International Obesity Task Force (IOTF), World Health Organization (WHO) and the national Norwegian Bergen Growth Study (BGS) BMI reference charts and the percentage above the International Obesity Task Force 25 cut-off (IOTF-25).

METHODS:

This was a cross-sectional study of 396 children aged four to 17 years, who attended a tertiary care obesity centre in Norway from 2009 to 2015. Their BMI was converted to SDS using the three growth references and expressed as the percentage above IOTF-25. The percentage of body fat was assessed by bioelectrical impedance analysis.

RESULTS:

Regardless of which BMI reference chart was used, the BMI-SDS was significantly different between the age groups, with a wider range of higher values up to 10 years of age and a more narrow range of lower values thereafter. The distributions of the percentage above IOTF-25 and percentage of body fat were more consistent across age groups.

CONCLUSIONS:

Our findings suggest that it may be more appropriate to use the percentage above a particular BMI cut-off, such as the percentage above IOTF-25, than the IOTF, WHO and BGS BMI-SDS in paediatric patients with severe obesity.

KEYWORDS:

Body mass index; International Obesity Task Force; Reference charts; Severe obesity standard deviation scores

PMID:
28992355
DOI:
10.1111/apa.14113
[Indexed for MEDLINE]

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