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Exposure to UV radiation and risk of Hodgkin lymphoma: a pooled analysis
Environmental Epidemiology Francer.
Cancer Prevention Instituet USA.
Cancer Prevention Instituet USA.
Karolinska Institutet.
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2013 (English)In: Blood, ISSN 0006-4971, E-ISSN 1528-0020, Vol. 122, no 20, 3492-3499 p.Article in journal (Refereed) Published
Abstract [en]

Ultraviolet radiation (UVR) exposure has been inversely associated with Hodgkin lymphoma (HL) risk, but only inconsistently, only in a few studies, and without attention to HL heterogeneity. We conducted a pooled analysis of HL risk focusing on type and timing of UVR exposure and on disease subtypes by age, histology, and tumor-cell Epstein-Barr virus (EBV) status. Four case-control studies contributed 1320 HL cases and 6381 controls. We estimated lifetime, adulthood, and childhood UVR exposure and history of sunburn and sunlamp use. We used 2-stage estimation with mixed-effects models and weighted pooled effect estimates by inverse marginal variances. We observed statistically significant inverse associations with HL risk for UVR exposures during childhood and adulthood, sunburn history, and sunlamp use, but we found no significant dose-response relationships. Risks were significant only for EBV-positive HL (pooled odds ratio, 0.56; 95% confidence interval, 0.35 to 0.91 for the highest overall UVR exposure category), with a significant linear trend for overall exposure (P = .03). Pooled relative risk estimates were not heterogeneous across studies. Increased UVR exposure may protect against HL, particularly EBV-positive HL. Plausible mechanisms involving UVR induction of regulatory T cells or the cellular DNA damage response suggest opportunities for new prevention targets.

Place, publisher, year, edition, pages
2013. Vol. 122, no 20, 3492-3499 p.
National Category
URN: urn:nbn:se:uu:diva-222087DOI: 10.1182/blood-2013-04-497586PubMedID: 24016459OAI: oai:DiVA.org:uu-222087DiVA: diva2:710704
Available from: 2014-04-08 Created: 2014-04-08 Last updated: 2014-04-09Bibliographically approved

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