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Digoxin use and the risk of breast cancer in women
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
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2011 (Engelska)Ingår i: Journal of Clinical Oncology, ISSN 0732-183X, E-ISSN 1527-7755, Vol. 29, nr 16, s. 2165-2170Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

PURPOSE Digoxin resembles estrogen chemically and may have estrogenic effect. We hypothesized that digoxin use might increase breast cancer incidence and examined if use might be associated with risk of breast cancer, categorized by estrogen receptor (ER) status. To determine if being under care for heart disease biased the findings, rate ratios in users of angina drugs were similarly evaluated as a control exposure group.

PATIENTS AND METHODS Women using digoxin and angina drugs were identified in the nationwide Danish Prescription Database, available between 1995 and 2008. Incident breast cancers were identified in the Danish Cancer Registry and further classifying by ER status. Relative risks (RR) were compared to nonusers using age- and period-adjusted incidence rate ratios.

RESULTS Two thousand one hundred forty-four of 104,648 women using digoxin developed breast cancer. Current digoxin users were at increased risk of breast cancer (RR, 1.39; 95% CI, 1.32 to 1.46), but risk was not increased in former users (RR, 0.91; 95% CI, 0.83 to 1.00). The increased risks in digoxin users were marginally higher for ER-positive breast cancers (RR, 1.35; 95% CI, 1.26 to 1.45) and ER unknown breast cancers (RR, 1.51; 95% CI, 1.38 to 1.64) than for ER-negative breast cancers (RR, 1.20; 95% CI, 1.03 to 1.40). Among 137,493 women exposed to angina drugs only (a comparison group with cardiovascular disease; n = 2,658 breast cancers), incidence was not increased in current or former users.

CONCLUSION Women currently using digoxin had a significantly increased risk of breast cancer. Risk normalized when digoxin was stopped. No risk increases were observed in women using angina drugs only. The higher risk of developing ER-positive breast cancers supports an estrogen-mimicking mechanism.

Ort, förlag, år, upplaga, sidor
American Society of Clinical Oncology , 2011. Vol. 29, nr 16, s. 2165-2170
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Cancer och onkologi
Identifikatorer
URN: urn:nbn:se:umu:diva-41999DOI: 10.1200/JCO.2010.32.8146PubMedID: 21422417OAI: oai:DiVA.org:umu-41999DiVA, id: diva2:408250
Tillgänglig från: 2011-04-04 Skapad: 2011-04-04 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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