ArticleInternational journal of cancer2017
Sleep characteristics, light at night and breast cancer risk in a prospective cohort.
Article in International journal of cancer, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 7 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
30 citing papers in PubMed, 7 syntheses or guidelines pooled it, 48 citations in OpenAlex.
- Sleep Traits to the Risk of Breast Cancer Disease Incidence, Adverse Progression and Mortality: Evidence From a Global Systematic Review and Meta-Analysis.International journal of public health · 2025Pooled it
- Light at night exposure and risk of breast cancer: a meta-analysis of observational studies.Frontiers in public health · 2023Pooled it
- Night-shift work, breast cancer incidence, and all-cause mortality: an updated meta-analysis of prospective cohort studies.Sleep & breathing = Schlaf & Atmung · 2022Pooled it
- Light at night and risk of breast cancer: a systematic review and dose-response meta-analysis.International journal of health geographics · 2021Pooled it
- Pooled it
- Pooled it
- Prolonged exposure to artificial light and carcinogenesis: A systematic review of oncostatic mechanisms associated with melatonin pathways.Photochemistry and photobiologyPooled it
- Sleep patterns and breast cancer risk: a prospective cohort study integrating multi-omics and machine learning.BMC cancer · 2026Article
- A narrative review of sleep and breast cancer: from epidemiology to mechanisms.Cancer causes & control : CCC · 2025Review
- Adults with type 1 diabetes who sleep 7-9 hours per night present lower glycemic variability: a cross-sectional study.Frontiers in endocrinology · 2025Article
- Night shift-induced circadian disruption: links to initiation of non-alcoholic fatty liver disease/non-alcoholic steatohepatitis and risk of hepatic cancer.Hepatoma research · 2024Article
- Feasibility and Acceptability Evaluation of a Digital Therapeutic Program for Improving Cancer Prevention: A Quasi-experimental Pre-post Interventional Pilot Study.Journal of cancer education : the official journal of the American Association for Cancer Education · 2024Article
- Sleep traits and breast cancer risk: a two-sample Mendelian randomization study.Scientific reports · 2024Article
- Exposure to Light at Night and Risk of Cancer: A Systematic Review, Meta-Analysis, and Data Synthesis.Cancers · 2024Review
- Eyes Wide Open: Sleep as a Potential Contributor to Racial and Ethnic Disparities in Cancer.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2024Review
- Prospective analysis of sleep characteristics, chronotype, and risk of breast cancer in the california teachers study.Cancer causes & control : CCC · 2024Article
- A Narrative Review of the Carcinogenic Effect of Night Shift and the Potential Protective Role of Melatonin.Cureus · 2023Review
- Depressive Symptoms and Sleep Duration as Risk Factors for Breast Cancer - China, 2020.China CDC weekly · 2023Article
- Examining the Health-Related Needs of Females during Menopause: A Systematic Review Study.Journal of menopausal medicine · 2023Review
- Outdoor light at night and risk of endometrial cancer in the NIH-AARP diet and health study.Cancer causes & control : CCC · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 3 institutions in 1 country.
Funding
Abstract
Increasing numbers of women in the US are getting too little sleep. Inadequate sleep has been associated with impaired metabolic function and endocrine disruption. Sister Study cohort participants (n = 50,884), completed baseline and follow-up questionnaires on sleep patterns. Incident breast cancers estrogen receptor (ER) status of the tumor were ascertained from questionnaires and medical records. Cox regression was used to estimate adjusted hazard ratios (HRs) and 95% confidence intervals (95% CIs). Analyses of sleep characteristics reported at the first follow-up interview included only participants who were breast cancer-free at time of follow-up interview. Over ∼7 years of follow-up, 2,736 breast cancer cases (invasive and ductal carcinoma in situ) were diagnosed. There was little evidence that usual sleep duration or other sleep characteristics were associated with breast cancer. However, relative to those with no difficulty sleeping, women who reported having difficulty sleeping ≥ 4 nights a week were at an increased risk of overall (HR = 1.32, 95% CI: 1.09-1.61) and postmenopausal breast cancer (HR = 1.51, 95% CI 1.24-1.85). Risk of ER+ invasive cancer was elevated for women who reported having a light or television on in the room while sleeping (HR = 1.20, 95% CI: 0.97-1.47) or who typically got less sleep than they needed to feel their best (HR = 1.21, 95% CI: 0.98-1.50). In our study, most sleep characteristics, including sleep duration, were not associated with an increased risk although higher risk was observed for some markers of inadequate or poor quality sleep.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.