Abstract
Background
Most studies examining post-menopausal menopausal hormone therapy (MHT) use and ovarian cancer risk have focused on White women and few have included Black women.
Methods
We evaluated MHT use and ovarian cancer risk in Black (n = 800 cases, 1783 controls) and White women (n = 2710 cases, 8556 controls), using data from the Ovarian Cancer in Women of African Ancestry consortium. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) for the association of MHT use with ovarian cancer risk, examining histotype, MHT type and duration of use.
Results
Long-term MHT use, ≥10 years, was associated with an increased ovarian cancer risk for White women (OR = 1.38, 95%CI: 1.22–1.57) and the association was consistent for Black women (OR = 1.20, 95%CI: 0.81–1.78, pinteraction = 0.4). For White women, the associations between long-term unopposed estrogen or estrogen plus progesterone use and ovarian cancer risk were similar; the increased risk associated with long-term MHT use was confined to high-grade serous and endometroid tumors. Based on smaller numbers for Black women, the increased ovarian cancer risk associated with long-term MHT use was apparent for unopposed estrogen use and was predominately confined to other epithelial histotypes.
Conclusion
The association between long-term MHT use and ovarian cancer risk was consistent for Black and White women.
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Data availability
The data underlying this article will be shared on reasonable request to the OCWAA Consortium.
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Acknowledgements
The authors thank the WHI investigators and staff for their dedication, and the study participants for making the study possible. A full listing of WHI investigators can be found at: https://www.whi.org/doc/WHI-Investigator-Long-List.pdf. Pathology data were obtained from the following state cancer registries (AZ, CA, CO, CT, DE, DC, FL, GA, IL, IN, KY, LA, MD, MA, MI, NJ, NY, NC, OK, PA, SC, TN, TX, VA), and results reported do not necessarily represent their views. The IRBs of participating institutions and cancer registries have approved these studies, as required. Opinions expressed by the authors are their own and this material should not be interpreted as representing the official viewpoint of the U.S. Department of Health and Human Services, the National Institutes of Health, or the National Cancer Institute.
Funding
The OCWAA Consortium is funded by the National Cancer Institute (R01CA207260), and the individual studies in the OCWAA Consortium received funding from several Institutes in the National Institutes of Health: R01CA142081 for AACES; R01CA058420, UM1CA164974, U01CA164974 for BWHS; P60MD003424 for CCCCS; N01CN025403, P01CA17054, P30CA14089, R01CA61132, N01PC67010, R03CA113148, R03CA115195 for LACOCS; U01CA164973 for MEC; and R01CA76016 for NCOCS. The WHI program is funded by the National Heart, Lung, and Blood Institute, National Institutes of Health, U.S. Department of Health and Human Services through contracts HHSN268201600001C, HHSN268201100046C, HHSN268201100001C, HHSN268201100002C, HHSN268201100003C, HHSN268201100004C, and HHSN271201100004C. Peres and Bethea are additionally supported by the National Cancer Institute (R00 CA218681 (Peres); K01 CA212056 (Bethea)); Petrick is supported by the Karin Grunebaum Cancer Research Foundation and the Boston University Peter Paul Career Development Professorship. The funders did not play a role in the design of the study; the collection, analysis, and interpretation of the data; the writing of the manuscript; and the decision to submit the manuscript for publication.
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Conceptualization: JMS, LR, CEJ, LCP, JLP. Data curation: CEJ, EVB, TNB, ABF, HRH, PGM, EM, HMO, VWS, AHW, LR, JMS. Formal Analysis: CEJ, TFC, WR. Funding acquisition: JMS, LR. Methodology: JMS, LR, CEJ, LCP, MEB, JLP. Critical revision and interpterion: All authors. Writing – original draft: JLP, LR. Writing – critical revision & editing: All authors. Approval of final manuscript: All authors.
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ME Barnard reports personal fees from Epi Excellence LLC outside of the submitted work. The remaining authors declare no competing interests.
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Petrick, J.L., Joslin, C.E., Johnson, C.E. et al. Menopausal hormone therapy use and risk of ovarian cancer by race: the ovarian cancer in women of African ancestry consortium. Br J Cancer 129, 1956–1967 (2023). https://doi.org/10.1038/s41416-023-02407-7
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DOI: https://doi.org/10.1038/s41416-023-02407-7