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The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study

Introduction. Low serum vitamin D levels are associated with increased postural sway. Vitamin D varies seasonally. This study investigates whether postural sway varies seasonally and is associated with serum vitamin D and falls. Methods. In a longitudinal observational study, eighty-eight independen...

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Autores principales: Bird, Marie-Louise, Hill, Keith D., Robertson, Iain, Ball, Madeleine J., Pittaway, Jane K., Williams, Andrew D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3816055/
https://www.ncbi.nlm.nih.gov/pubmed/24223307
http://dx.doi.org/10.1155/2013/751310
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author Bird, Marie-Louise
Hill, Keith D.
Robertson, Iain
Ball, Madeleine J.
Pittaway, Jane K.
Williams, Andrew D.
author_facet Bird, Marie-Louise
Hill, Keith D.
Robertson, Iain
Ball, Madeleine J.
Pittaway, Jane K.
Williams, Andrew D.
author_sort Bird, Marie-Louise
collection PubMed
description Introduction. Low serum vitamin D levels are associated with increased postural sway. Vitamin D varies seasonally. This study investigates whether postural sway varies seasonally and is associated with serum vitamin D and falls. Methods. In a longitudinal observational study, eighty-eight independently mobile community-dwelling older adults (69.7 ± 7.6 years) were evaluated on five occasions over one year, measuring postural sway (force platform), vitamin D levels, fall incidence, and causes and adverse outcomes. Mixed-methods Poisson regression was used to determine associations between measures. Results. Postural sway did not vary over the year. Vitamin D levels varied seasonally (P < 0.001), peaking in summer. Incidence of falls (P = 0.01) and injurious falls (P = 0.02) were lower in spring, with the highest fall rate at the end of autumn. Postural sway was not related to vitamin D (P = 0.87) or fall rates, but it was associated with fall injuries (IRR 1.59 (CI 1.14 to 2.24, P = 0.007). Conclusions. Postural sway remained stable across the year while vitamin D varied seasonally. Participants with high values for postural sway demonstrated higher rates of injurious falls. This study provides important evidence for clinicians and researchers providing interventions measuring balance outcomes across seasons.
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spelling pubmed-38160552013-11-12 The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study Bird, Marie-Louise Hill, Keith D. Robertson, Iain Ball, Madeleine J. Pittaway, Jane K. Williams, Andrew D. J Aging Res Clinical Study Introduction. Low serum vitamin D levels are associated with increased postural sway. Vitamin D varies seasonally. This study investigates whether postural sway varies seasonally and is associated with serum vitamin D and falls. Methods. In a longitudinal observational study, eighty-eight independently mobile community-dwelling older adults (69.7 ± 7.6 years) were evaluated on five occasions over one year, measuring postural sway (force platform), vitamin D levels, fall incidence, and causes and adverse outcomes. Mixed-methods Poisson regression was used to determine associations between measures. Results. Postural sway did not vary over the year. Vitamin D levels varied seasonally (P < 0.001), peaking in summer. Incidence of falls (P = 0.01) and injurious falls (P = 0.02) were lower in spring, with the highest fall rate at the end of autumn. Postural sway was not related to vitamin D (P = 0.87) or fall rates, but it was associated with fall injuries (IRR 1.59 (CI 1.14 to 2.24, P = 0.007). Conclusions. Postural sway remained stable across the year while vitamin D varied seasonally. Participants with high values for postural sway demonstrated higher rates of injurious falls. This study provides important evidence for clinicians and researchers providing interventions measuring balance outcomes across seasons. Hindawi Publishing Corporation 2013 2013-10-07 /pmc/articles/PMC3816055/ /pubmed/24223307 http://dx.doi.org/10.1155/2013/751310 Text en Copyright © 2013 Marie-Louise Bird et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Clinical Study
Bird, Marie-Louise
Hill, Keith D.
Robertson, Iain
Ball, Madeleine J.
Pittaway, Jane K.
Williams, Andrew D.
The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title_full The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title_fullStr The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title_full_unstemmed The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title_short The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study
title_sort association between seasonal variation in vitamin d, postural sway, and falls risk: an observational cohort study
topic Clinical Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3816055/
https://www.ncbi.nlm.nih.gov/pubmed/24223307
http://dx.doi.org/10.1155/2013/751310
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