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DOI: 10.1177/1090198105285329 Validity of a Sun Safety Diary Using UV Monitors in Middle School ChildrenNational Cancer Institute, Division of Cancer Control and Population Sciences, Health Promotion Research Branch, 6130 Executive Blvd., Rm. 4074/MSC 7335, Bethesda, MD 20892; phone: (301) 451-9530; fax: (301) 480-2087; yarocha{at}mail.nih.gov
University of Southern California, Keck School of Medicine, Institute for Health Promotion & Disease Prevention Research, Alhambra, California.
Klein Buendel, Inc., Golden, Colorado.
Kaiser Permanente, Denver, Colorado. This article describes a validity study conducted among middle school students comparing self-reported sun safetybehaviorsfroma diarywith readingsfromultraviolet(UV)monitorswornondifferentbodysites. The UV monitors are stickers with panels that turn increasingly darker shades of blue in the presence of increasing amounts of UV light. Three schools participated (N = 527). Statistically significant associations were found between self-reported behaviors and the UV monitor measurements, with Kendall's tau b's ranging from 0.400 to 0.823. Multiple regression was performed and indicator variables created separately for arm (R = .12) and leg (R = .49) coverage by protective clothing. The effect of time spent outdoors on the UV monitor measure was attenuated when the students reported having the corresponding body site covered with clothing. Self-reported shade was not a significant predictor of UV monitor change. Overall, the results provide evidence of validity of students' self-reports of time outdoors and protective clothing use.
Key Words: validity sun safety measurement
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