Journal article

Predicting vitamin D deficiency in older Australian adults

Bich Tran, Bruce K Armstrong, Kevin McGeechan, Peter R Ebeling, Dallas R English, Michael G Kimlin, Robyn Lucas, Jolieke C van der Pols, Alison Venn, Val Gebski, David C Whiteman, Penelope M Webb, Rachel E Neale



OBJECTIVE: There has been a dramatic increase in vitamin D testing in Australia in recent years, prompting calls for targeted testing. We sought to develop a model to identify people most at risk of vitamin D deficiency. DESIGN AND PARTICIPANTS: This is a cross-sectional study of 644 60- to 84-year-old participants, 95% of whom were Caucasian, who took part in a pilot randomized controlled trial of vitamin D supplementation. MEASUREMENTS: Baseline 25(OH)D was measured using the Diasorin Liaison platform. Vitamin D insufficiency and deficiency were defined using 50 and 25 nmol/l as cut-points, respectively. A questionnaire was used to obtain information on demographic characteristics and life..

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Awarded by National Health and Medical Research Council of Australia

Funding Acknowledgements

This project was funded by the National Health and Medical Research Council of Australia (grant number 613655). The investigational product was supplied free of charge by sanofi-aventis healthcare pty ltd trading as Sanofi Consumer Healthcare, 87 Yarraman Pl, Virginia QLD 4014 Australia. PM Webb and A Venn are supported by Fellowships from the NHMRC. DC Whiteman is supported by a Future Fellowship from the Australian Research Council. B Tran is supported by a Postdoctoral Fellowship from the NHMRC Centre for Research Excellence in Sun and Health. MG Kimlin is supported through a Cancer Council Queensland Senior Research Fellowship. We would like to thank Ivan Hanigan at the Australian National University for his assistance in georeferencing UVR data. We also acknowledge the contribution of the project manager, Catherine Baxter and the research assistant, Christine Hill, without whom this work would not have been possible.