AUTHOR=Zhang Jingya , Lu Yongbo , Zhang Ning , Ning Wei , Zhu Bin , Mao Ying 

TITLE=Sleep Traits to the Risk of Breast Cancer Disease Incidence, Adverse Progression and Mortality: Evidence From a Global Systematic Review and Meta-Analysis

JOURNAL=International Journal of Public Health

VOLUME=Volume 70 - 2025

YEAR=2025

URL=https://www.ssph-journal.org/journals/international-journal-of-public-health/articles/10.3389/ijph.2025.1608535

DOI=10.3389/ijph.2025.1608535

ISSN=1661-8564

ABSTRACT=ObjectivesThis study aimed to identify the effect of sleep traits on the risk of breast cancer incidence and adverse progression and mortality.MethodsCohort studies measuring the relationship between sleep traits (including sleep quality and sleep duration) and breast cancer risk were eligible for inclusion. We searched the Web of Science, PubMed, EMBASE and Cochrane library databases for studies published between 2014 and 2024. Maximum covariate-adjusted odds ratio (OR) was combined. A fixed or a randomized effect model was applied according to the heterogeneity.Results34 studies met the inclusion and exclusion criteria. Low quality sleep significantly increased the risk of incidence (OR:1.09, 95%CI:1.05–1.13), adverse progression (OR:1.55,95%CI:1.51–1.59), and specific mortality (OR:1.54, 95%CI:1.50–1.58) of breast cancer. Sleep duration >9 h had a poor effect on breast cancer-specific mortality (OR:1.45,95%CI:1.02–2.04).ConclusionsThe available evidence points to sleep traits as primarily influencing progression in breast cancer patients and having a relatively small effect on breast cancer incidence. Prolonged sleep may lead to breast cancer-specific mortality, but more research is needed in the future to continue to explore the impact of sleep duration and breast cancer risk.