Non-steroidal anti-inflammatory drug (NSAID) use and breast cancer risk in the Western New York Exposures and Breast Cancer (WEB) Study

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Abstract
Objective Chronic inflammation is suspected to have a role in breast carcinogenesis. Results of studies of non-steroidal anti-inflammatory drugs (NSAIDs) and breast cancer have been inconsistent. Timing of exposure and analysis of individual NSAIDs should be considered. Methods We conducted a population-based case–control study in western New York State between 1996 and 2001. Cases, 35–79 years, had incident, primary, histologically confirmed breast cancer (n = 1,170). Controls (n = 2,115) were randomly selected from NY Department of Motor Vehicles records (10 days/month, adjusted OR 0.68, 95% CI: 0.46–1.00). Use of ibuprofen or acetaminophen was not associated with breast cancer. Conclusions This is the first study to investigate the association of adult lifetime aspirin intake with breast cancer risk. Our findings provide evidence that aspirin use throughout a woman’s life may confer some benefit.

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