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Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study

OBJECTIVE: Although the tracking of BMI levels from childhood to adulthood has been examined, there is little information on the within-person variability of BMI. METHODS: We used longitudinal data from 11,591 schoolchildren, 3096 of whom were reexamined as adults, to explore the tracking and variab...

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Autores principales: Freedman, David S, Lawman, Hannah G, Galuska, Deborah A, Goodman, Alyson B, Berenson, Gerald S
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6014905/
https://www.ncbi.nlm.nih.gov/pubmed/29888429
http://dx.doi.org/10.1002/oby.22199
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author Freedman, David S
Lawman, Hannah G
Galuska, Deborah A
Goodman, Alyson B
Berenson, Gerald S
author_facet Freedman, David S
Lawman, Hannah G
Galuska, Deborah A
Goodman, Alyson B
Berenson, Gerald S
author_sort Freedman, David S
collection PubMed
description OBJECTIVE: Although the tracking of BMI levels from childhood to adulthood has been examined, there is little information on the within-person variability of BMI. METHODS: We used longitudinal data from 11,591 schoolchildren, 3096 of whom were reexamined as adults, to explore the tracking and variability of BMI levels. We focus on changes in age-adjusted levels of BMI. RESULTS: There was strong tracking of BMI levels. The correlation of adjusted BMI levels was r=0.88 and 78% of children with severe obesity at one examination had severe obesity at the next examination (mean interval, 2.7 years). Further, an increase in adjusted BMI from +5 kg/m(2) (above the median) to +10 increased the risk for adult BMI ≥ 40 by 2.7-fold. However, BMI levels among children and adolescents were variable. Over a 9- to 15-month interval, the SD of adjusted BMI change was 0.9 kg/m(2) and 0.7% of children had an absolute change ≥ 3.5. This variability was associated with the interval between examinations and with the initial BMI. CONCLUSIONS: Despite the high degree of tracking of BMI, annual changes of 3.5 kg/m(2) or more are plausible. Knowledge of this variability is important when following a child over time.
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spelling pubmed-60149052018-12-11 Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study Freedman, David S Lawman, Hannah G Galuska, Deborah A Goodman, Alyson B Berenson, Gerald S Obesity (Silver Spring) Article OBJECTIVE: Although the tracking of BMI levels from childhood to adulthood has been examined, there is little information on the within-person variability of BMI. METHODS: We used longitudinal data from 11,591 schoolchildren, 3096 of whom were reexamined as adults, to explore the tracking and variability of BMI levels. We focus on changes in age-adjusted levels of BMI. RESULTS: There was strong tracking of BMI levels. The correlation of adjusted BMI levels was r=0.88 and 78% of children with severe obesity at one examination had severe obesity at the next examination (mean interval, 2.7 years). Further, an increase in adjusted BMI from +5 kg/m(2) (above the median) to +10 increased the risk for adult BMI ≥ 40 by 2.7-fold. However, BMI levels among children and adolescents were variable. Over a 9- to 15-month interval, the SD of adjusted BMI change was 0.9 kg/m(2) and 0.7% of children had an absolute change ≥ 3.5. This variability was associated with the interval between examinations and with the initial BMI. CONCLUSIONS: Despite the high degree of tracking of BMI, annual changes of 3.5 kg/m(2) or more are plausible. Knowledge of this variability is important when following a child over time. 2018-06-11 2018-07 /pmc/articles/PMC6014905/ /pubmed/29888429 http://dx.doi.org/10.1002/oby.22199 Text en http://www.nature.com/authors/editorial_policies/license.html#terms Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms
spellingShingle Article
Freedman, David S
Lawman, Hannah G
Galuska, Deborah A
Goodman, Alyson B
Berenson, Gerald S
Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title_full Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title_fullStr Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title_full_unstemmed Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title_short Tracking and variability in childhood levels of BMI: The Bogalusa Heart Study
title_sort tracking and variability in childhood levels of bmi: the bogalusa heart study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6014905/
https://www.ncbi.nlm.nih.gov/pubmed/29888429
http://dx.doi.org/10.1002/oby.22199
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