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Reproductive factors and epithelial ovarian cancer survival in the EPIC cohort study

  • Jelena Bešević
  • , Marc J Gunter
  • , Renée T Fortner
  • , Konstantinos K Tsilidis
  • , Elisabete Weiderpass
  • , N Charlotte Onland-Moret
  • , Laure Dossus
  • , Anne Tjønneland
  • , Louise Hansen
  • , Kim Overvad
  • , Sylvie Mesrine
  • , Laura Baglietto
  • , Françoise Clavel-Chapelon
  • , Rudolf Kaaks
  • , Krasimira Aleksandrova
  • , Heiner Boeing
  • , Antonia Trichopoulou
  • , Pagona Lagiou
  • , Christina Bamia
  • , Giovanna Masala
  • Claudia Agnoli, Rosario Tumino, Fulvio Ricceri, Salvatore Panico, H Bas Bueno-de-Mesquita, Petra H Peeters, Mie Jareid, J Ramón Quirós, Eric J Duell, María-José Sánchez, Nerea Larrañaga, María-Dolores Chirlaque, Aurelio Barricarte, Joana A Dias, Emily Sonestedt, Annika Idahl, Eva Lundin, Nicholas J Wareham, Kay-Tee Khaw, Ruth C Travis, Sabina Rinaldi, Isabelle Romieu, Elio Riboli, Melissa A Merritt

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

BACKGROUND: Reproductive factors influence the risk of developing epithelial ovarian cancer (EOC), but little is known about their association with survival. We tested whether prediagnostic reproductive factors influenced EOC-specific survival among 1025 invasive EOC cases identified in the European Prospective Investigation into Cancer and Nutrition (EPIC) study, which included 521,330 total participants (approximately 370,000 women) aged 25-70 years at recruitment from 1992 to 2000.

METHODS: Information on reproductive characteristics was collected at recruitment. Cox proportional hazards regression models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs), and multivariable models were adjusted for age and year of diagnosis, body mass index, tumour stage, smoking status and stratified by study centre.

RESULTS: After a mean follow-up of 3.6 years (±3.2 s.d.) following EOC diagnosis, 511 (49.9%) of the 1025 women died from EOC. We observed a suggestive survival advantage in menopausal hormone therapy (MHT) users (ever vs never use, HR=0.80, 95% CI=0.62-1.03) and a significant survival benefit in long-term MHT users (⩾5 years use vs never use, HR=0.70, 95% CI=0.50-0.99, P(trend)=0.04). We observed similar results for MHT use when restricting to serous cases. Other reproductive factors, including parity, breastfeeding, oral contraceptive use and age at menarche or menopause, were not associated with EOC-specific mortality risk.

CONCLUSIONS: Further studies are warranted to investigate the possible improvement in EOC survival in MHT users.

Original languageEnglish
Pages (from-to)1622-31
Number of pages10
JournalBritish Journal of Cancer
Volume113
Issue number11
DOIs
Publication statusPublished - 2015-Dec-01
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • Adult
  • Age Factors
  • Aged
  • Aged, 80 and over
  • Breast Feeding
  • Carcinoma, Ovarian Epithelial
  • Contraceptives, Oral/therapeutic use
  • Estrogen Replacement Therapy
  • Europe/epidemiology
  • Female
  • Follow-Up Studies
  • Humans
  • Menarche
  • Menopause
  • Middle Aged
  • Neoplasms, Glandular and Epithelial/mortality
  • Ovarian Neoplasms/mortality
  • Parity
  • Survival Rate

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