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    Use of nonsteroidal anti-inflammatory drugs and breast cancer risk in a prospective cohort of postmenopausal women.

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    Author
    Cairat, M; Al Rahmoun, M; Gunter, MJ; Severi, G; Dossus, L; Fournier, A
    Date
    2020-10-31
    Source Title
    Breast Cancer Research
    Publisher
    Springer Science and Business Media LLC
    University of Melbourne Author/s
    Severi, Gianluca
    Affiliation
    Melbourne School of Population and Global Health
    Metadata
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    Document Type
    Journal Article
    Citations
    Cairat, M., Al Rahmoun, M., Gunter, M. J., Severi, G., Dossus, L. & Fournier, A. (2020). Use of nonsteroidal anti-inflammatory drugs and breast cancer risk in a prospective cohort of postmenopausal women.. Breast Cancer Res, 22 (1), pp.118-. https://doi.org/10.1186/s13058-020-01343-1.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/252968
    DOI
    10.1186/s13058-020-01343-1
    Open Access at PMC
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7603705
    Abstract
    BACKGROUND: Although anti-inflammatory agents could theoretically have anticancer properties, results from cohort studies on nonsteroidal anti-inflammatory drugs (NSAIDs) and breast cancer (BC) risk are inconsistent. METHODS: We investigated the association between NSAID use and BC incidence in the French E3N prospective cohort, which includes 98,995 women born between 1925 and 1950 and insured by a health insurance plan that covers mostly teachers. Self-reported information on lifestyle and medical history has been collected biennially by questionnaires and matched with data from a drug reimbursement database covering the period 2004-2014. Women who self-reported current NSAID use in the 2000 or 2002 questionnaires or with at least two reimbursements in any previous 3-month period were defined as exposed to NSAIDs. Multivariable Cox regression models were used to estimate hazard ratios (HRs) for the association of NSAID use with BC risk. RESULTS: In the current analysis, 62,512 postmenopausal women were followed between 2004 and 2014 (9 years on average, starting at a mean age of 63 years; 2864 incident BC). In multivariable models, there was no statistically significant association between NSAID use and BC risk [HR = 1.00 (0.92-1.08), compared with non-exposed women]. The NSAID-BC associations did not differ by NSAID types, BC subtypes, risk factors, and comorbidities, nor by duration and dose of use. However, a statistically significant interaction was observed by proton pump inhibitor (PPI) drug use (Pinteraction = 0.01) whereby a decreased risk of BC with NSAID use was only observed among women who also used PPI before. CONCLUSION: Only women who used NSAIDs after having used PPI had a lower risk of BC. This result is novel and requires replication in other studies.

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