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Sun exposure behaviors matched to dose of UV radiation received

CHICAGO Danish researchers found that sun exposure behaviors and personal characteristics are correlated with the dose of ultraviolet radiation (UVR) a person receives, according to a report in the February issue of The Archives of Dermatology, one of the JAMA/Archives journals.

UVR exposure is a well-known risk factor for developing skin cancer, according to the article. Guidelines of safe limits of UVR exposure have been issued by many international health organizations. These limits are determined using information on sun exposure collected by questionnaires, diaries and personal UVR dosimetry studies. Some UVR measuring devices (called dosimeters) can be affixed to the body or clothing and used to measure personal overall UVR exposure and cumulative UVR doses. To analyze individual sun exposure patterns, continuous UVR measurements need to be taken and matched to time of day and activity of the dosimeter wearer.

Elisabeth Thieden, M.Sc. (Pharm), of the University of Copenhagen, Denmark, and colleagues examined individual UVR dose patterns and sun exposure in 285 Danish volunteers with healthy skin ranging in age from 4 to 68 years. Participants in the study wore a dosimeter on their wrist to record UVR exposure and time every ten minutes.

The study took place in segments spanning three years: from June 16, 1999 to October 31, 1999; from April 5, 2000 to September 30, 2000; and from April 6, 2001 to August 31, 2001. Participants were instructed to wear the wrist dosimeters when they were outdoors, at least between 7 a.m. and 7 p.m. Participants were also given diaries for recording whether they wore the dosimeter each day, if it was a work/school day or a weekend/holiday, if they were abroad, if they sunbathed (how long) and if they exposed their shoulders or upper body to the sun (how long), and if they went to the beach. The unit of measurement for UVR exposure is called the standard erythema dose (SED).

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Contact: Elisabeth Thieden, M.Sc. (Pharm)
et01@bbh.hosp.dk
JAMA and Archives Journals
16-Feb-2004


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