"All the previous studies that were available in Canada and all the current studies that are coming out of the United States are showing persistent increases, and have in fact claimed that there's a huge epidemic," said Dr. Andrei Metelitsa, a University of Alberta dermatology occupant who ran the study with his colleagues.
"Obviously, this was worrying, so we thought it would be nice to see what was actually happening by analyzing this very large group of individuals over a large period of time," he said.The researchers studied two non-melanoma skin cancers: squamous cell carcinomas and basal cell carcinomas, both of which are slow-growing and rarely deadly. They can be seen as a scab that grows over a period of weeks or months, or as a rough patch of skin that bleeds and won't cure.
Genetic predispositions, such as having fair skin and blue eyes, increases one's risk, but frequent sunburns and chronic sun exposure are the key behavioural factors.Using data from the Alberta Cancer Registry, Metelitsa and his group analyzed reports from almost 100,000 patients in Alberta over a period of 20 years. What they discovered went directly against widespread prospect that skin cancer was continuing to escalate.
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