Night shift work, sleep duration and endometrial cancer risk: A pooled analysis from the Epidemiology of Endometrial Cancer Consortium (E2C2)

Jon Frias-Gomez, Laia Alemany, Yolanda Benavente, Megan A. Clarke, Javier de Francisco, Immaculata De Vivo, Mengmeng Du, Marc T. Goodman, James Lacey, Linda M. Liao, Loren Lipworth, Lingeng Lu, Melissa A. Merritt, Kara A. Michels, Kelli O'Connell, Sonia Paytubi, Beatriz Pelegrina, Paula Peremiquel-Trillas, Stacey Petruzella, Jordi PonceHarvey Risch, Veronica Wendy Setiawan, Leo J. Schouten, Xiao ou Shu, Britton Trabert, Piet A. Van den Brandt, Nicolas Wentzensen, Lynne R. Wilkens, Herbert Yu, Laura Costas*, Epidemiology of Endometrial Cancer Consortium (E2C2)

*Corresponding author for this work

Research output: Contribution to journal(Systematic) Review article peer-review

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Abstract

Data on the role of circadian related factors in the etiology of endometrial cancer are scarce. We collected individual data on night shift work or daily sleep duration from 7,207 cases and 22,027 controls participating in 11 studies from the Epidemiology of Endometrial Cancer Consortium (E2C2). Main analyses were performed among postmenopausal women: 6,335 endometrial cancer cases and 18,453 controls. Using individual data, study-specific odd ratios (ORs) and their corresponding 95% confidence intervals (CIs) were estimated with logistic regression and pooled analyses were conducted using random-effects meta-analyses. A non-significant inverse association was observed between endometrial cancer and night shift work (OR=0.89, 95%CI=0.72–1.09; I2=0.0%, Pheterogeneity=0.676). Associations did not vary by shift type (permanent or rotating), or duration of night work. Categorizations of short (<7h) or long (=9h) sleep duration were not associated with endometrial cancer risk (ORshort=1.02, 95%CI=0.95–1.10; I2=55.3%, Pheterogeneity=0.022; ORlong=0.93, 95%CI=0.81–1.06; I2=11.5%, Pheterogeneity=0.339). No associations were observed per 1-h increment of sleep (OR=0.98, 95%CI=0.95–1.01; I2=46.1%, Pheterogeneity=0.063), but an inverse association was identified among obese women (OR=0.93, 95%CI=0.89–0.98 per 1-h increment; I2=12.7%, Pheterogeneity=0.329). Overall, these pooled analyses provide evidence that night shift work and sleep duration are not strong risk factors for endometrial cancer in postmenopausal women.
Original languageEnglish
Article number101848
Number of pages11
JournalSleep Medicine Reviews
Volume72
Issue number1
DOIs
Publication statusPublished - 1 Dec 2023

Keywords

  • Endometrial cancer
  • Individual data
  • Meta-analysis
  • Night shift work
  • Pooled analysis
  • Sleep duration

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