dc.contributor.author |
Scragg, Robert |
en |
dc.contributor.author |
Stewart, Alistair |
en |
dc.contributor.author |
McKenzie, RL |
en |
dc.contributor.author |
Reeder, AI |
en |
dc.contributor.author |
Liley, JB |
en |
dc.contributor.author |
Allen, MW |
en |
dc.date.accessioned |
2017-10-16T01:56:18Z |
en |
dc.date.issued |
2017-09 |
en |
dc.identifier.citation |
Journal of Exposure Science and Environmental Epidemiology 27(5):471-477 Sep 2017 |
en |
dc.identifier.issn |
1476-5519 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/36077 |
en |
dc.description.abstract |
There is uncertainty about the amount of sun exposure required to increase low blood 25-hydroxyvitamin D (25(OH)D3) levels, a possible disease risk factor. The study aimed to quantify the association between sun exposure and serum 25(OH)D3 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, SEDEFB. Blood samples were collected at the end of weeks 4 and 8 to measure 25(OH)D3. Median weekly SEDEFB was 0.33 during weeks 1-4 and 0.34 during weeks 5-8. Weekly exposures <0.5 SEDEFB during weeks 5-8 were associated with decreasing 25(OH)D3 concentrations at the end of week 8. There was a non-linear association between sun exposure and 25(OH)D3, with most of the increase in 25(OH)D3 being at exposures <2 SEDEFB per week. This finding suggests that vitamin D status is increased by regular small sun exposures (<2 SEDEFB per week), and that greater exposures result in only small additional increases in 25(OH)D3. |
en |
dc.format.medium |
Print-Electronic |
en |
dc.language |
eng |
en |
dc.publisher |
Nature Publishing Group |
en |
dc.relation.ispartofseries |
Journal of Exposure Science and Environmental Epidemiology |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Sun exposure and 25-hydroxyvitamin D3 levels in a community sample: Quantifying the association with electronic dosimeters |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1038/jes.2016.51 |
en |
pubs.issue |
5 |
en |
pubs.begin-page |
471 |
en |
pubs.volume |
27 |
en |
dc.rights.holder |
Copyright: Nature Publishing Group |
en |
dc.identifier.pmid |
27599885 |
en |
pubs.end-page |
477 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
541296 |
en |
pubs.org-id |
Medical and Health Sciences |
en |
pubs.org-id |
Population Health |
en |
dc.identifier.eissn |
1559-064X |
en |
pubs.record-created-at-source-date |
2017-10-16 |
en |
pubs.dimensions-id |
27599885 |
en |