Bladder Cancer Risk Lower in Pot Smokers

SAN DIEGO—For the first time, a study has found that cannabis use may be associated with a decreased risk of bladder cancer, researchers reported at the American Urological Association 2013 annual meeting.
In a study of nearly 82,000 men, bladder cancer developed in 279 over an 11-year period. Subjects who smoked marijuana, but not tobacco, had a significant 45% decreased risk of bladder cancer compared with those who did not, after adjusting for age, body mass index, and race and ethnicity, according to lead investigator Anil A. Thomas, MD, a researcher with Southern California Permanent Medical Group in Los Angeles.
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