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Body mass index classification misses to identify children with an elevated waist-to-height ratio at 5 years of age
Högskolan i Halmstad, Akademin för hälsa och välfärd, Centrum för forskning om välfärd, hälsa och idrott (CVHI).ORCID-id: 0000-0003-4451-1593
Department of Pediatrics, The Institute of Clinical Sciences at the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Pediatrics, The Institute of Clinical Sciences at the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Pediatrics, The Institute of Clinical Sciences at the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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2019 (Engelska)Ingår i: Pediatric Research, ISSN 0031-3998, E-ISSN 1530-0447, Vol. 85, nr 1, s. 30-32Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background:  Abdominal adiposity is an important risk factor in the metabolic syndrome. Since BMI does not reveal fat distribution, waist-to-height ratio (WHtR) has been suggested as a better measure of abdominal adiposity in children, but only a few studies cover the preschool population. The aim of the present study was to examine BMI and WHtR growth patterns and their association regarding their ability to identify children with an elevated WHtR at 5 years of age.

Methods: A population-based longitudinal birth cohort study of 1540 children, followed from 0 to 5 years with nine measurement points. The children were classified as having WHtR standard deviation scores (WHtRSDS) <1 or ≥1 at 5 years. Student’s t-tests and Chi-squared tests were used in the analyses.

Results: Association between BMISDS and WHtRSDS at 5 years showed that 55% of children with WHtRSDS ≥1 at 5 years had normal BMISDS (p < 0.001). Children with WHtRSDS ≥1 at 5 years had from an early age significantly higher mean BMISDS and WHtRSDS than children with values <1.

Conclusions: BMI classification misses every second child with WHtRSDS ≥1 at 5 years, suggesting that WHtR adds value in identifying children with abdominal adiposity who may need further investigation regarding cardiometabolic risk factors.

© 2018, International Pediatric Research Foundation, Inc.

Ort, förlag, år, upplaga, sidor
New York, NY: Nature Publishing Group, 2019. Vol. 85, nr 1, s. 30-32
Nationell ämneskategori
Pediatrik
Identifikatorer
URN: urn:nbn:se:hh:diva-38474DOI: 10.1038/s41390-018-0188-4PubMedID: 30287892Scopus ID: 2-s2.0-85054473136OAI: oai:DiVA.org:hh-38474DiVA, id: diva2:1267741
Projekt
Halland Health and Growth StudyTillgänglig från: 2018-12-03 Skapad: 2018-12-03 Senast uppdaterad: 2019-04-24Bibliografiskt granskad
Ingår i avhandling
1. Overweight and Obesity in Preschool Children: Early Risk Factors and Early Identification
Öppna denna publikation i ny flik eller fönster >>Overweight and Obesity in Preschool Children: Early Risk Factors and Early Identification
2019 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

BACKGROUND: Overweight and obesity in children has reached epidemic proportions in recent decades, and even the youngest age groups are affected. Excess weight during childhood often follows the child into adulthood and is associated with diseases such as cardiovascular diseases and type 2 diabetes mellitus. In addition, excess weight often leads to health problems already during childhood. Childhood obesity is therefore one of the greatest public health challenges of the 21st century.

AIM: The overall aim was to study growth patterns and early risk factors for overweight, obesity and an elevated waist-to-height ratio (WHtR) in preschool children. The specific aims were to: examine early body mass index (BMI) and WHtR growth patterns and their ability to predict overweight or obesity in children at 5 years of age (Paper I); examine if BMI and WHtR growth patterns from an early age could identify children with an elevated WHtR at 5 years of age by using standard deviation score(s) (SDS) in children classified according to WHtRSDS at 5 years of age. Another aim was to study the association between BMISDS and WHtRSDS at 5 years of age (Paper II); examine nutrition- and feeding practice-related risk factors for rapid weight gain during the first 0–6 months and the following 6–12 months (Paper III); examine the association between potential early risk factors and an elevated WHtR, defined as WHtRSDS ≥ 1 at 5 years of age, and examine whether similar associations also were found for overweight or obesity at the same age (Paper IV).

METHODS: This project was part of the population-based birth cohort study the Halland Health and Growth Study, including 2,666 children born in the county of Halland in the southwestern part of Sweden between October 2007 and December 2008. Weight, height and waist circumference were measured at nine time points starting at birth. At every measurement point the parents filled in questionnaires regarding their child’s nutrition, health and lifestyle and also background information about the family.

RESULTS: We found that children with overweight or obesity at 5 years of age could be identified already from an early age by significantly higher mean BMISDS and WHtRSDS than corresponding values in children with normal weight or underweight. BMI was sufficient for predicting overweight or obesity at 5 years of age and WHtR did not add any further information in this prediction.

Children with a WHtRSDS ≥ 1 at 5 years of age could be identified already from an early age by significantly higher mean BMISDS and WHtRSDS than corresponding values in children with a WHtRSDS < 1. When comparing WHtRSDS and BMISDS at 5 years of age, 55% of the children with an elevated WHtRSDS had normal BMISDS.

Rapid weight gain was more common during the first 6 months of the first year than during the next 6 months. Bottle-feeding and nighttime meals containing formula milk were associated with rapid weight gain between 0 and 6 months. Breastfeeding was negatively associated with rapid weight gain during the same period.

Rapid weight gain during 0–6 months and also maternal pre-pregnancy BMI and paternal BMI were associated with a WHtRSDS ≥ 1 at 5 years of age. Rapid weight gain during both 0–6 and 6–12 months and also maternal pre-pregnancy BMI, were associated with overweight or obesity at 5 years of age.

CONCLUSION: This thesis showed that BMI was sufficient for predicting overweight or obesity at 5 years of age, and WHtR did not add any further information to this prediction. For identification of children with an elevated WHtR, BMI classification missed every second child, indicating that WHtR adds value in children who may need further investigation regarding cardiometabolic risk factors. Risk factors operating before pregnancy and early in life increase the risk of early rapid weight gain, an elevated WHtR and overweight or obesity at 5 years of age and bottle feeding, nighttime meals, early rapid weight gain as well as parental overweight are potential modifiable risk factors in this development.

Ort, förlag, år, upplaga, sidor
Halmstad: Halmstad University Press, 2019. s. 97
Serie
Halmstad University Dissertations ; 56
Nyckelord
abdominal adiposity, adiposity rebound, body mass index, childhood obesity, childhood overweight, early growth patterns, infancy peak, preschool children, waist-to-height ratio
Nationell ämneskategori
Pediatrik Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi
Identifikatorer
urn:nbn:se:hh:diva-39265 (URN)978-91-88749-20-8 (ISBN)978-91-88749-21-5 (ISBN)
Disputation
2019-05-17, Baertling, Hus J, Högskolan i Halmstad, Halmstad, 09:00 (Svenska)
Opponent
Handledare
Anmärkning

Funding: Research and Development Center Spenshult and Halmstad University

Tillgänglig från: 2019-04-25 Skapad: 2019-04-24 Senast uppdaterad: 2019-04-25Bibliografiskt granskad

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Lindholm, AnnelieBremander, AnnStaland Nyman, CarinBergman, Stefan

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