Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy. bosetti@marionegri.it
Abstract:
The role of aspirin on the risk of cancers of the upper aerodigestive tract was investigated in the combined data of three Italian case-control studies, including 965 cases and 1779 hospital controls. The odds ratio was 0.33 for users of > or = 5 years, and 0.51 for > or = 5 years since first use.