Abstract
The aim was to validate a sun exposure questionnaire against objective measures of change in skin color and to assess its validity in predicting serum vitamin D in a sample of African Americans and Hispanics with type 2 diabetes. Ninety participants were enrolled. The sun exposure score was calculated by multiplying the time spent outdoors times the skin exposed score. Skin color was determined by reflectance colorimetry. The relationship between serum vitamin D, skin exposure score and stomach skin color was evaluated by a multi‐linear regression model. The unadjusted model showed that skin exposure score (P=0.037), and stomach skin color (P=0.021) were associated with serum vitamin D. This relationship remained significant only for stomach skin color (P=0.020) after controlling for covariates. The color of the skin is a better predictor of serum vitamin D in this particular population than sun exposure behaviors. Funding for this research was provided through an NIH/NIDDK sponsored grant.
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