Sun exposure and 25-hydroxyvitamin D.sub.3 levels in a community sample: Quantifying the association with electronic dosimeters

There is uncertainty about the amount of sun exposure required to increase low blood 25-hydroxyvitamin D (25(OH)D.sub.3) levels, a possible disease risk factor. The study aimed to quantify the association between sun exposure and serum 25(OH)D.sub.3 concentrations in a multiethnic community sample (...

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Bibliographic Details
Published in:Journal of exposure science & environmental epidemiology 2017-09, Vol.27 (5), p.471
Main Authors: McKenzie, Richard L, Reeder, Anthony I, Allen, Martin W, Scragg, Robert K R, Stewart, Alistair W, Liley, J Ben
Format: Article
Language:English
Subjects:
Complications and side effects
Dosimeters
Health aspects
Sun exposure
Vitamin D deficiency
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Summary:There is uncertainty about the amount of sun exposure required to increase low blood 25-hydroxyvitamin D (25(OH)D.sub.3) levels, a possible disease risk factor. The study aimed to quantify the association between sun exposure and serum 25(OH)D.sub.3 concentrations in a multiethnic community sample (n=502) living in Auckland (37°S) and Dunedin (46°S), New Zealand, aged 18-85 years. They wore electronic ultraviolet dosimeters between March and November (autumn, winter and spring) for 8 weeks to record their sun exposure. This was converted to standard erythemal doses (SEDs), corrected for clothing to generate equivalent full-body exposures, SED.sub.EFB. Blood samples were collected at the end of weeks 4 and 8 to measure 25(OH)D.sub.3. Median weekly SED.sub.EFB was 0.33 during weeks 1-4 and 0.34 during weeks 5-8. Weekly exposures
ISSN:1559-0631
DOI:10.1038/jes.2016.51