Journal
CANCER EPIDEMIOLOGY
Volume 34, Issue 6, Pages 689-695Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.canep.2010.06.011
Keywords
Non-melanoma skin cancer; Socioeconomic status; Incidence; Survival; Denmark
Funding
- Danish Cancer Society
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Background: The two main types of non-melanoma skin cancer differ with the pattern of exposure to ultraviolet radiation (UVR): basal cell carcinoma (BCC) appears to be more closely related to intermittent solar exposure and sunburn, while the risk for sguamous cell carcinoma (SCC) is a result of lifetime cumulated exposure to UVR. As these exposures may differ by social position, we investigated its role in the risk for and survival after BCC and SCC diagnosed in Denmark in 1994-2006 with follow-up through 2006. Methods: The analyses were based on 52,166 cases of BCC and 5033 cases of SCC in a cohort of 3.7 million people born between 1925 and 1976 and residing in Denmark in 1992-2006. Information on cancer cases and socioeconomic indicators were obtained from population-based registries. We used log-linear Poisson regression models to estimate incidence rate ratios and cumulative relative survival to estimate survival up to 10 years after the first incident cases of BCC and SCC. Results: High socioeconomic status, measured by both education and disposable income, was strongly associated with a higher risk for BCC, whereas there was no association between SCC and educational level and only a weak association with income. In general, relative survival after BCC was better than after SCC; the pattern of survival was not affected by socioeconomic indicators. Conclusions: The observed pattern of social status and risk for non-melanoma skin cancer differed substantially for the two cancer types, supporting the hypothesis that they may have different aetiologies. (C) 2010 Elsevier Ltd. All rights reserved.
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