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The association between aeasonal variation in vitamin D, postural sway, and falls risk: an observational cohort study


Bird, M-L and Hill, KD and Robertson, I and Ball, MJ and Pittaway, JK and Williams, AD, The association between aeasonal variation in vitamin D, postural sway, and falls risk: an observational cohort study, Journal of Aging Research, 2013 Article 751310. ISSN 2090-2204 (2013) [Refereed Article]


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Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0)

DOI: doi:10.1155/2013/751310


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 (69.77.6 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.

Item Details

Item Type:Refereed Article
Keywords:balance, fall rate
Research Division:Health Sciences
Research Group:Public health
Research Field:Preventative health care
Objective Division:Health
Objective Group:Provision of health and support services
Objective Field:Provision of health and support services not elsewhere classified
UTAS Author:Bird, M-L (Dr Marie-Louise Bird)
UTAS Author:Robertson, I (Dr Iain Robertson)
UTAS Author:Ball, MJ (Professor Madeleine Ball)
UTAS Author:Pittaway, JK (Ms Jane Pittaway)
UTAS Author:Williams, AD (Associate Professor Andrew Williams)
ID Code:86693
Year Published:2013
Deposited By:Health Sciences A
Deposited On:2013-10-11
Last Modified:2017-11-01
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