Abstract
Purpose
Associations between sun exposure (a primary source of vitamin D) and risk of ovarian cancer have been inconsistent. Furthermore, studies have not investigated whether sun exposure at different periods in the lifetime of a person results in differences in risk associations, and little is known about differences according to histological subtype.
Methods
Using a population-based case–control study of 1,334 non-Hispanic white women diagnosed with epithelial ovarian cancer in western Washington State between 2002 and 2009 and 1,679 non-Hispanic white controls, we assessed the relation of epithelial ovarian cancer with constitutional pigmentation characteristics, sun exposure behaviors, and an index of ultraviolet (UV) exposure based on residential history. Information was collected through in-person interviews. Logistic regression was used to compute odds ratios, 95 % confidence intervals, and trend p values (Ptrend).
Results
We noted no association with residence-based measures of UV exposure or self-reported sun exposure, either over the lifetime or within specific age intervals. Also, we observed little evidence of association between constitutional pigmentation characteristics and risk, save for a suggestion of increased risk among women who reported increased ability to suntan upon prolonged sun exposure (Ptrend = 0.03).
Conclusions
Results from this study suggest that sun exposure has little influence on the risk of epithelial ovarian cancer. Additional studies in populations with a wider gradient of sun exposure may yet be warranted.
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Acknowledgments
The study was supported by grants R01 CA112523 and R01 CA87538 from the National Cancer Institute. CB was partially supported by grant number T32 CA009168 from the National Institutes of Health.
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Bodelon, C., Cushing-Haugen, K.L., Wicklund, K.G. et al. Sun exposure and risk of epithelial ovarian cancer. Cancer Causes Control 23, 1985–1994 (2012). https://doi.org/10.1007/s10552-012-0076-x
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DOI: https://doi.org/10.1007/s10552-012-0076-x