Non-steroidal anti-inflammatory drug (NSAID) use and breast cancer risk in the Western New York Exposures and Breast Cancer (WEB) Study.
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 (<65 years) or Medicare rolls (>or=65 years). Participants were queried on use of aspirin, ibuprofen, and acetaminophen in the year prior and on aspirin during adulthood. Unconditional logistic regression was used to estimate adjusted odds ratios (OR) and 95% confidence intervals (95% CI).


RESULTS
Recent aspirin use was inversely associated with breast cancer risk (adjusted OR 0.80, 95% CI: 0.68-0.94); the strongest reduction in risk was observed among those who took >or=2 pills/day on days that aspirin was taken (OR 0.74, 95% CI: 0.61-0. 90). Adult lifetime use was also associated with breast cancer risk (>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.
Brasky
Theodore M
TM
Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214, USA. tbrasky@fhcrc.org
Bonner
Matthew R
MR
Moysich
Kirsten B
KB
Ambrosone
Christine B
CB
Nie
Jing
J
Tao
Meng Hua
MH
Edge
Stephen B
SB
Kallakury
Bhaskar V S
BV
Marian
Catalin
C
Trevisan
Maurizio
M
Shields
Peter G
PG
Freudenheim
Jo L
JL
D000328:Adult; D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D001241:Aspirin / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000453:epidemiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008875:Middle Aged; D009518:New York; D016017:Odds Ratio; D012307:Risk Factors; D011795:Surveys and Questionnaires
D000894:Anti-Inflammatory Agents, Non-Steroidal; D001241:Aspirin