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Author Leung, L.; Grundy, A.; Siemiatycki, J.; Arseneau, J.; Gilbert, L.; Gotlieb, W.H.; Provencher, D.M.; Aronson, K.J.; Koushik, A.
Title Shift Work Patterns, Chronotype, and Epithelial Ovarian Cancer Risk Type Journal Article
Year 2019 Publication Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology Abbreviated Journal Cancer Epidemiol Biomarkers Prev
Volume in press Issue Pages 1055-9965.EPI-18-1112
Keywords Human Health; chronotype; Cancer; epithelial ovarian cancer; Ovarian cancer
Abstract BACKGROUND: Shift work causing circadian disruption is classified as a 'probable carcinogen' and may contribute to the pathogenesis of hormone-sensitive cancers. This study investigated shift work exposure in relation to epithelial ovarian cancer (EOC) risk. METHODS: In a population-based case-control study with 496 EOC cases and 906 controls, lifetime occupational histories were collected and used to calculate cumulative years of shift work exposure, average number of night shifts per month, and average number of consecutive night shifts per month. Odds ratios (ORs) and 95% confidence intervals (CIs) for associations with EOC risk were estimated using logistic regression. Associations were also examined according to chronotype and menopausal status. RESULTS: Over half of the cases (53.4%) and controls (51.7%) worked evening and/or night shifts. There was no clear pattern of increasing EOC risk with increasing years of shift work; the adjusted OR (95%CI) of EOC comparing the highest shift work category vs. never working shift work was 1.20 (0.89-1.63). This association was more pronounced among those self-identified as having a “morning” chronotype (OR=1.64, 95%CI: 1.01-2.65). Associations did not greatly differ by menopausal status. CONCLUSION: These results do not strongly demonstrate a relationship between shift work and EOC risk. IMPACT: This study collected detailed shift work information and examined shift work patterns according to shift times and schedules. The findings highlight that chronotype should be considered in studies of shift work as an exposure.
Address Department of Social and Preventive Medicine, Universite de Montreal; Department of Social and Preventive Medicine
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1055-9965 ISBN Medium
Area Expedition Conference
Notes PMID:30842128 Approved no
Call Number GFZ @ kyba @ Serial (down) 2261
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