Summary

Original source:
http://news.yahoo.com/s/nm/20050727/sc_nm/asthma_cancer_dc;_ylt=AmLkeLB0y6MkpOBeHhoLZKDVJRIF;_ylu=X3oDMTBiMW04NW9mBHNlYwMlJVRPUCUl

Details

• Previous studies have suggested this pattern, the authors explain in the American Journal of Epidemiology, but some reports have shown an increased risk of lung cancer in asthma patients.
• Dr. Michelle C. Turner from the University of Ottawa, Ontario, Canada and associates used data from the American Cancer Society Cancer Prevention Study II to examine the association between allergy and cancer risk.
• Participants with histories of both asthma and hay fever were 12 percent less likely to die from cancer, the researchers found.
• For those with hay fever only the chances were reduced by 8 percent, and among those with asthma and/or hay fever the reduction in risk was 6 percent.
• A history of asthma only was associated with a lower risk of death due to leukemia but a higher risk of dying of lung cancer, the report indicates.
• A history of hay fever only was associated with a significantly lower risk of pancreatic cancer mortality.
• "Collectively, these results suggest an association between a history of allergy and cancer mortality," the authors conclude.
• "However, the strength of the evidence for this association is limited."
• Turner told Reuters Health: "Additional large prospective studies with better allergy indicators and cancer incidence, as well as laboratory studies examining potential biological mechanisms for a potential association, would be useful."

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