Sleep duration and the risk of breast cancer: the Ohsaki Cohort Study
Open accessAbstract
In a prospective study of 23 995 Japanese women, short sleep duration was associated with higher risk of breast cancer (143 cases), compared with women who slept 7 h per day, the multivariate hazard ratio of those who slept ⩽ 6 h per day was 1.62 (95% confidence interval: 1.05–2.50; P for trend=0.03).
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Four studies showed no association between sleep duration and breast cancer, while one showed ≤6 hours of sleep was associated with increased risk of breast cancer compared to 7 hours of sleep.
“Four studies showed no association between sleep duration and breast cancer, while one showed ≤ 6 hours of sleep was associated with increased risk of breast cancer compared to 7 hours of sleep.46”
Four studies showed no association between sleep duration and breast cancer, while one showed ≤6 hours of sleep was associated with increased risk of breast cancer compared to 7 hours of sleep.
“Four studies showed no association between sleep duration and breast cancer, while one showed ≤ 6 hours of sleep was associated with increased risk of breast cancer compared to 7 hours of sleep.”
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- Authors
- Kakizaki, M., Kuriyama, S., Sone, T., Ohmori-Matsuda, K., Hozawa, A., Nakaya, N., Fukudo, S., & Tsuji, I.
- Affiliations
- Tohoku University (JP)
- Corresponding author
- Kakizaki, M
- Venue
- British Journal of Cancer
- Published
- 2008-09-23
- Volume
- 99
- Issue
- 9
- Pages
- 1502-1505
- ISSN
- 0007-0920 (ISSN-L)
- 1532-1827
- PMC
- PMC2579702
- OpenAlex
- W4242851810
- Cited by
- 187
- References
- 24
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 14 · 2023: 14 · 2022: 13 · 2021: 12 · 2020: 14 · 2019: 8 · 2018: 11 · 2017: 10 · 2016: 12 · 2015: 15 · 2014: 7 · 2013: 18 · 2012: 16
- FWCI
- 2.50
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by-nc-sa
- www.springer.com/tdm (unspecified)
- Locations
- British Journal of Cancer (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion, cc-by)
- Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Ministry of Health, Labour and Welfare
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Health Sciences › Medicine › Oncology › Cancer Risks and Factors
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Keywords
- sleep duration, breast cancer risk, short sleep duration, Japanese women, prospective cohort, hazard ratio
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