Monitoring children and adolescents with severe obesity: body mass index (BMI), BMI z-score or percentage above the International Obesity Task Force overweight cut-off?
Body mass index
Childhood obesity
Monitoring
Journal
Acta paediatrica (Oslo, Norway : 1992)
ISSN: 1651-2227
Titre abrégé: Acta Paediatr
Pays: Norway
ID NLM: 9205968
Informations de publication
Date de publication:
12 2019
12 2019
Historique:
received:
28
11
2018
revised:
30
05
2019
accepted:
12
06
2019
pubmed:
15
6
2019
medline:
30
10
2020
entrez:
15
6
2019
Statut:
ppublish
Résumé
Body mass index (BMI) metrics are widely used as a proxy for adiposity in children with severe obesity. The BMI expressed as the percentage of a cut-off percentile for overweight or obesity has been proposed as a better alternative than BMI z-scores when monitoring children and adolescents with severe obesity. Annual changes in BMI, BMI z-score and the percentage above the International Obesity Task Force overweight cut-off (%IOTF-25) were compared with dual-energy X-ray absorptiometry (DXA) derived body fat (%BF-DXA) in 59 children and adolescents with severe obesity. The change in %BF-DXA was correlated with the change in %IOTF-25 (r = 0.68) and BMI (r = 0.70), and somewhat less with the BMI z-score (r = 0.57). Cohen's Kappa statistic to detect an increase or decrease in %BF-DXA was fair for %IOTF-25 (κ = 0.25; p = 0.04) and BMI (κ = 0.33; p = 0.01), but not for the BMI z-score (κ = 0.08; p = 0.5). The change in BMI was positively biased due to a natural increase with age. Changes in the BMI metrics included in the study are associated differently with changes in %BF-DXA. The BMI z-score is widely used to monitor changes in adiposity in children and adolescents with severe obesity, but the %IOTF-25 might be a better alternative.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2261-2266Informations de copyright
©2019 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.
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