An Inter-Method Reliability Study Comparing Interview Information on Sunlight, Tanning Beds, Food, and Supplement Exposures with Serum 25-Hydroxy Vitamin D Levels
Abstract:Background: We developed a questionnaire designed to capture the vitamin D related exposures of sunlight, tanning bed use, dietary intake, and supplement use, and used an inter-method reliability approach to compare the study method (self-reported information on vitamin D related exposures nearest the blood draw) with serum 25-hydroxy vitamin D (25(OH)D) levels.Methods: This inter-method reliability study included 512 control women from a population-based, case-control study in Alberta, Canada. All women self-… Show more
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