Abstract
Purpose
This study aims to investigate the associations of rotating night shift work history and sleep duration with risk of colorectal adenoma.
Methods
We evaluated 56,275 cancer-free participants of the Nurses’ Health Study II, who had their first colonoscopy or sigmoidoscopy between 1991 and 2011; rotating night shift work and sleep duration were reported by mailed questionnaire. Multivariable-adjusted logistic regression was used to estimate relative risks (RR) of colorectal adenoma, with 95% confidence intervals (CI), across categories of rotating night shift work history (none, 1–4, 5–9, and ≥10 years) and sleep duration (≤5, 6, 7, 8, and ≥9 h/day).
Results
We found no association between duration of rotating night shift work and occurrence of colorectal adenoma (p-trend across shift work categories = 0.5). Women with the longest durations of rotating night shift work (≥10 years) had a similar risk of adenoma compared to women without a history of rotating night shift work (multivariable-adjusted RR = 0.96, 95% CI = 0.83–1.11). Similarly, there were no associations of shorter or longer sleep durations with adenoma risk (p-trend = 0.2 across sleep durations of ≤5 through 7 h/day and p-trend = 0.5 across sleep durations of 7 through ≥9 h/day). Results were similar when we examined associations according to adenoma location and subtype.
Conclusions
Our results do not support an association between rotating night shift work or sleep duration and risk of colorectal adenoma in women.
References
Straif K, Baan R, Grosse Y, Secretan B, El Ghissassi F, Bouvard V, Altieri A, Benbrahim-Tallaa L, Cogliano V, Group WHOIAFRoCMW (2007) Carcinogenicity of shift-work, painting, and fire-fighting. Lancet Oncol 8(12):1065–1066
Wang X, Ji A, Zhu Y, Liang Z, Wu J, Li S, Meng S, Zheng X, Xie L (2015) A meta-analysis including dose-response relationship between night shift work and the risk of colorectal cancer. Oncotarget 6(28):25046–25060. doi:10.18632/oncotarget.4502
Fritschi L, Glass DC, Heyworth JS, Aronson K, Girschik J, Boyle T, Grundy A, Erren TC (2011) Hypotheses for mechanisms linking shiftwork and cancer. Med Hypotheses 77(3):430–436. doi:10.1016/j.mehy.2011.06.002
Giovannucci E (2002) Epidemiologic studies of folate and colorectal neoplasia: a review. J Nutr 132(8 Suppl):2350S–2355S
Strum WB (2016) Colorectal adenomas. N Engl J Med 375(4):389–390. doi:10.1056/NEJMc1604867
Thompson CL, Larkin EK, Patel S, Berger NA, Redline S, Li L (2011) Short duration of sleep increases risk of colorectal adenoma. Cancer 117(4):841–847. doi:10.1002/cncr.25507
Jiao L, Duan Z, Sangi-Haghpeykar H, Hale L, White DL, El-Serag HB (2013) Sleep duration and incidence of colorectal cancer in postmenopausal women. Br J Cancer 108(1):213–221. doi:10.1038/bjc.2012.561
Zhang X, Giovannucci EL, Wu K, Gao X, Hu F, Ogino S, Schernhammer ES, Fuchs CS, Redline S, Willett WC, Ma J (2013) Associations of self-reported sleep duration and snoring with colorectal cancer risk in men and women. Sleep 36(5):681–688. doi:10.5665/sleep.2626
Hurley S, Goldberg D, Bernstein L, Reynolds P (2015) Sleep duration and cancer risk in women. Cancer Causes Control 26(7):1037–1045. doi:10.1007/s10552-015-0579-3
Acknowledgments
We would like to thank the participants and staff of the Nurses’ Health Study II for their valuable contributions as well as the following state cancer registries for their help: AL, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KY, LA, ME, MD, MA, MI, NE, NH, NJ, NY, NC, ND, OH, OK, OR, PA, RI, SC, TN, TX, VA, WA, and WY.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Funding
This research was generously supported by grants from the National Institutes of Health. The National Institute for Occupational Safety and Health and Centers for Disease Control and Prevention funded this project (R21 OH010204 and R01 OH009803), with additional support from the National Cancer Institute (P50 CA127003 and R35 CA197735). The National Cancer Institute also funds the Nurses’ Health Study II cohort (UM1 CA176726).
Disclosure of potential conflicts of interest
The authors declare that they have no conflict of interest.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
Informed consent
Informed consent was obtained from all individual participants included in the study.
Additional information
Elizabeth E. Devore and Jennifer Massa contributed equally to this manuscript.
Rights and permissions
About this article
Cite this article
Devore, E.E., Massa, J., Papantoniou, K. et al. Rotating night shift work, sleep, and colorectal adenoma in women. Int J Colorectal Dis 32, 1013–1018 (2017). https://doi.org/10.1007/s00384-017-2758-z
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00384-017-2758-z