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Agreement between diary records of time spent outdoors and personal ultraviolet radiation dose measurements

Chodick, Gabriel, Kleinerman, Ruth A., Linet, Martha S., Fears, Tom, Kwok, Richard K., Kimlin, Michael G., Alexander, Bruce H., & Freedman, Daryl M. (2008) Agreement between diary records of time spent outdoors and personal ultraviolet radiation dose measurements. Photochemistry and Photobiology, 84(3), pp. 713-718.

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Abstract

Little is known about the validity of self-recorded sun exposure and time spent outdoors for epidemiological research. The aims of the current study were to assess how well participants' self-recorded time outdoors compared to objective measurements of personal UVR doses. We enrolled 124 volunteers aged 40 and above who were identified from targeted subgroups of US radiologic technologists. Each volunteer was instructed to wear a polysulfone (PS) dosimeter to measure UVR on their left shoulder and to complete a daily activity diary, listing all activities undertaken in each 30 min interval between 9:00 A.M. and 5:00 P.M. during a 7 day period. In a linear regression model, self-recorded daily time spent outdoors was associated with an increase of 8.2% (95% CI: 7.3–9.2%) in the personal UVR exposure with every hour spent outdoors. The amount of self-recorded total daily time spent outdoors was better correlated with the personal daily UVR dose for activities conducted near noon time compared to activities conducted in the morning or late afternoon, and for activities often performed in the sun (e.g. gardening or recreation activities) compared to other outdoor activities (e.g. driving) in which the participant is usually shaded from the sun. Our results demonstrated a significant correlation between diary records of time spent outdoors with objective personal UVR dose measurements.

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18 citations in Web of Science®

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ID Code: 17923
Item Type: Journal Article
Additional Information: Acknowledgements—The study was funded by the National Cancer Institute, National Institutes of Health and U.S. Public Health Service.
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Keywords: UVR Ultraviolet radiation, Time spent outdoors, UV exposure
DOI: 10.1111/j.1751-1097.2007.00236.x
ISSN: 00318655
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Public Health and Health Services not elsewhere classified (111799)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 08 Apr 2009 09:27
Last Modified: 29 Feb 2012 23:46

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