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Melanoma incidence has been correlated strongly and positively with both socioeconomic status (SES) and lower latitude and other measures of ambient UV radiation (UVR). However, because high-SES populations may be colocated in areas of high UVR, we assessed their joint influences on melanoma occurrence to better target subpopulations for melanoma education and screening.We obtained from the California Cancer Registry information regarding 23,564 incident cases of invasive cutaneous melanoma among non-Hispanic white residents between January 1, 1998, and December 31, 2002. We geocoded each case based on residence at diagnosis and linked previously tested neighborhood measures of SES and average annual UVR to calculate age-adjusted incidence rates, rate ratios, and the corresponding 95% confidence intervals. Poisson regression was used to calculate multivariately adjusted rate ratios.UVR was significantly and positively associated with melanoma incidence only among persons living in the top 40% of California neighborhoods ranked by SES. People in neighborhoods of the highest SES and UVR categories had 60% higher rates of melanoma than those from neighborhoods in the lowest categories (rate ratio, 1.60; 95% confidence interval, 1.02-2.51).Our findings indicate that UVR and SES interact to influence melanoma occurrence and suggest that socioeconomic gradients in melanoma incidence are not explained entirely by UVR.Cancer prevention and early detection educational efforts should be targeted to high-SES groups in areas of high UVR exposure. Contextual measures of both SES and UVR should be considered important determinants of melanoma occurrence in future studies.
View details for DOI 10.1158/1055-9965.EPI-10-0692
View details for Web of Science ID 000283991600005
View details for PubMedID 20978173
View details for PubMedCentralID PMC2976826