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The contributions of solar ultraviolet radiation exposure and other determinants to serum 25-hydroxyvitamin D concentrations in Australian adults: The AusD study

Citation

Kimlin, MG and Lucas, RM and Harrison, SL and van der Mei, I and Armstrong, BK and Whiteman, DC and Kricker, A and Nowak, M and Brodie, AM and Sun, J, The contributions of solar ultraviolet radiation exposure and other determinants to serum 25-hydroxyvitamin D concentrations in Australian adults: The AusD study, American Journal of Epidemiology, 179, (7) pp. 864-874. ISSN 1476-6256 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 The Author

DOI: doi:10.1093/aje/kwt446

Abstract

The Quantitative Assessment of Solar UV [ultraviolet] Exposure for Vitamin D Synthesis in Australian Adults (AusD) Study aimed to better define the relationship between sun exposure and serum 25-hydroxyvitamin D (25(OH)D) concentration. Cross-sectional data were collected between May 2009 and December 2010 from 1,002 participants aged 18-75 years in 4 Australian sites spanning 24° of latitude. Participants completed the following: 1) questionnaires on sun exposure, dietary vitamin D intake, and vitamin D supplementation; 2) 10 days of personal ultraviolet radiation dosimetry; 3) a sun exposure and physical activity diary; and 4) clinical measurements and blood collection for 25(OH)D determination. Our multiple regression model described 40% of the variance in 25(OH)D concentration; modifiable behavioral factors contributed 52% of the explained variance, and environmental and demographic or constitutional variables contributed 38% and 10%, respectively. The amount of skin exposed was the single strongest contributor to the explained variance (27%), followed by location (20%), season (17%), personal ultraviolet radiation exposure (8%), vitamin D supplementation (7%), body mass index (weight (kg)/height (m) 2) (4%), and physical activity (4%). Modifiable behavioral factors strongly influence serum 25(OH)D concentrations in Australian adults. In addition, latitude was a strong determinant of the relative contribution of different behavioral factors. © 2014 The Author.

Item Details

Item Type:Refereed Article
Keywords:determinants, sunlight, ultraviolet, vitamin D
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Epidemiology
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Behaviour and Health
Author:van der Mei, I (Associate Professor Ingrid van der Mei)
ID Code:92241
Year Published:2014
Web of Science® Times Cited:46
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-06-11
Last Modified:2017-11-03
Downloads:0

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