Low-dose aspirin use and the risk of ovarian cancer in Denmark

TY - JOUR

T1 - Low-dose aspirin use and the risk of ovarian cancer in Denmark

AU - Baandrup, Lone

AU - Kjaer, S K

AU - Olsen, J H

AU - Dehlendorff, C

AU - Friis, S

N1 - © The Author 2014. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved. For permissions, please email: [email protected].

PY - 2015/4/1

Y1 - 2015/4/1

N2 - BACKGROUND: A comprehensive body of evidence has shown that aspirin has cancer-preventive effects, particularly against gastrointestinal cancer, but its effects on the risk of ovarian cancer are less well established. This nationwide case-control study examined the association between low-dose aspirin and the risk of ovarian cancer.PATIENTS AND METHODS: We identified all patients in the Danish Cancer Registry aged 30-84 years old with a histologically verified first diagnosis of epithelial ovarian cancer during 2000-2011. Each patient was sex- and age-matched to 15 population controls using risk-set sampling. Prescription use, comorbidity, reproductive history, and demographic characteristics data were obtained from nationwide registries. The use of low-dose (75-150 mg) aspirin was defined according to the dose as well as the duration and consistency of use. Conditional logistic regression was used to calculate odds ratios (ORs) with 95% confidence intervals (CIs) for the association between low-dose aspirin use and the risk of epithelial ovarian cancer, both overall and for specific histological types.RESULTS: For 4103 ovarian cancer cases and 58 706 population controls, the adjusted OR for epithelial ovarian cancer associated with ever use (≥2 prescriptions) of low-dose aspirin was 0.94 (95% CI 0.85-1.05). ORs for epithelial ovarian cancer were lower with the use of 150 mg aspirin tablets (OR = 0.82; 95% CI 0.68-0.99) and with long-term use (≥5 years) of low-dose aspirin (OR = 0.77; 95% CI 0.55-1.08). Continuous long-term use of low-dose aspirin, defined as close consecutive prescriptions, was associated with a further reduction in OR (0.56; 95% CI 0.32-0.97). For histological types of epithelial ovarian cancer, the strongest inverse associations with low-dose aspirin use were seen for mucinous and endometrioid tumours.CONCLUSION: This nationwide case-control study indicates that low-dose aspirin use may be associated with a reduced risk of epithelial ovarian cancer.

AB - BACKGROUND: A comprehensive body of evidence has shown that aspirin has cancer-preventive effects, particularly against gastrointestinal cancer, but its effects on the risk of ovarian cancer are less well established. This nationwide case-control study examined the association between low-dose aspirin and the risk of ovarian cancer.PATIENTS AND METHODS: We identified all patients in the Danish Cancer Registry aged 30-84 years old with a histologically verified first diagnosis of epithelial ovarian cancer during 2000-2011. Each patient was sex- and age-matched to 15 population controls using risk-set sampling. Prescription use, comorbidity, reproductive history, and demographic characteristics data were obtained from nationwide registries. The use of low-dose (75-150 mg) aspirin was defined according to the dose as well as the duration and consistency of use. Conditional logistic regression was used to calculate odds ratios (ORs) with 95% confidence intervals (CIs) for the association between low-dose aspirin use and the risk of epithelial ovarian cancer, both overall and for specific histological types.RESULTS: For 4103 ovarian cancer cases and 58 706 population controls, the adjusted OR for epithelial ovarian cancer associated with ever use (≥2 prescriptions) of low-dose aspirin was 0.94 (95% CI 0.85-1.05). ORs for epithelial ovarian cancer were lower with the use of 150 mg aspirin tablets (OR = 0.82; 95% CI 0.68-0.99) and with long-term use (≥5 years) of low-dose aspirin (OR = 0.77; 95% CI 0.55-1.08). Continuous long-term use of low-dose aspirin, defined as close consecutive prescriptions, was associated with a further reduction in OR (0.56; 95% CI 0.32-0.97). For histological types of epithelial ovarian cancer, the strongest inverse associations with low-dose aspirin use were seen for mucinous and endometrioid tumours.CONCLUSION: This nationwide case-control study indicates that low-dose aspirin use may be associated with a reduced risk of epithelial ovarian cancer.

KW - Adenocarcinoma, Clear Cell

KW - Adenocarcinoma, Mucinous

KW - Adult

KW - Aged

KW - Aged, 80 and over

KW - Anti-Inflammatory Agents, Non-Steroidal

KW - Aspirin

KW - Case-Control Studies

KW - Cystadenocarcinoma, Serous

KW - Denmark

KW - Dose-Response Relationship, Drug

KW - Endometrial Neoplasms

KW - Female

KW - Follow-Up Studies

KW - Humans

KW - Male

KW - Middle Aged

KW - Neoplasm Staging

KW - Ovarian Neoplasms

KW - Prognosis

KW - Registries

KW - Risk Factors

U2 - 10.1093/annonc/mdu578

DO - 10.1093/annonc/mdu578

M3 - Journal article

C2 - 25538177

SN - 0923-7534

VL - 26

SP - 787

EP - 792

JO - Annals of Oncology

JF - Annals of Oncology

IS - 4

ER -