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|Title: ||Sunlight exposure and vitamin D status of older people in residential aged care|
|Authors: ||Durvasula, Seeta|
|Issue Date: ||28-Mar-2014|
|Publisher: ||University of Sydney. Medicine. Northern Clinical School.|
|Abstract: ||Aims: Determine the vitamin D (25OHD) response to therapeutic sun exposure in older people in residential aged care, and identify factors that determined sun exposure.
Methods: In a 12 month cluster randomised controlled trial (RCT) of sunlight exposure and calcium, the main outcomes were falls’ rate and changes in 25OHD. UVR dose was estimated from ambient solar UV Index data. Multiple linear regression was used to test if UVR dose predicted vitamin D response. Adherence factors were identified through semi-structured interviews and focus groups. Outdoor spaces of residential facilities were assessed.
Results: Adherence to sunlight exposure was low and there was no significant decrease in falls’ risk or increase in 25OHD except in those with higher attendance rates. The significant predictors of 25OHD at six months were UVR exposures in spring-summer and autumn-winter, and baseline vitamin D. Poor health, physical constraints and lack of autonomy were barriers to attendance. Design features of outdoor spaces hindered their use.
Conclusion: Older people have the capacity to produce vitamin D from natural sunlight UVR, but vitamin D response was minimal due to poor adherence. Safe sun exposure can be encouraged in this population by addressing the barriers identified in this study.|
|Access Level: ||Access is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.|
|Rights and Permissions: ||The author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.|
|Type of Work: ||PhD Doctorate|
|Type of Publication: ||Doctor of Philosophy Ph.D.|
|Appears in Collections:||Sydney Digital Theses (University of Sydney Access only)|
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|DURVASULA Seeta - Final thesis.pdf||2 MB||Adobe PDF|
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