Sunburn, suntan and the risk of cutaneous malignant melanoma--The Western Canada Melanoma Study.

Each remained statistically significant when adjusted for the other, and the adjusted relative risk estimates were similar to the unadjusted figures shown in Table I. History of sunburn and suntan compared to tendency to burn or tan In this study, a highly significant association was seen between melanoma risk and the subject's perceived tendency to burn or tan, as assessed by their responses to a standard question on how their skin tended to react to a few days' exposure to unaccustomed strong sunlight (Elwood et al., 1984).

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The trend in relative risk with increasing sunburn score was regular and statistically significant (P <0.01). Suntan The index of "usual degree of suntan" was assessed for the winter and for the summer months separately, and in each case showed a trend of increased risk over the three categories of deep tan, moderate tan, and mild or no tan.

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