Association between alcohol consumption and breast cancer incidence and prognosis: A systematic review and meta-analysis
Year: 2026
Type: review
Study designs: Systematic Review, Meta-Analysis
Abstract: BACKGROUND: While alcohol consumption appears to influence the incidence of breast cancer (BC), its association with prognosis after a BC diagnosis remains less established. This meta-analysis aimed to explore the association between alcohol consumption on both BC incidence and outcomes. METHODS: A systematic literature search was conducted up to May 1st, 2025 (CRD42025593784). Retrospective and prospective studies reporting BC incidence, recurrences, and survival outcomes in women with history of alcohol consumption were included. Analyses according to alcohol intake levels (light, intermediate, heavy consumption) were performed. Main outcomes were BC incidence, BC recurrences, BC-specific survival (BCSS), and overall survival (OS). Pooled relative risk (RR) and hazard ratio (HR) with 95% confidence interval (CI) were calculated. RESULTS: Out of 5208 screened records, 37 studies including 2,565,920 women were included. Among 17 studies reporting on BC incidence, any alcohol consumption was associated with an increased BC incidence (RR 1.17, 95%CI 1.09-1.26; p < 0.001). BC incidence increased proportionally with higher levels of alcohol consumption: light RR 1.13 (95%CI 1.05-1.23; p = 0.002), intermediate RR 1.28 (95%CI 1.18-1.39; p < 0.001), and heavy consumption RR 1.52 (95%CI 1.38-1.67; p < 0.001). Among 20 studies assessing BC outcomes, no associations were found between alcohol consumption and BC recurrences (RR 1.02, 95%CI 0.93-1.11) nor BCSS (HR 0.93, 95%CI 0.87-1.00), while light and intermediate alcohol consumption were associated with slightly improved OS: HR 0.85 (95%CI 0.78-0.92; p < 0.001) and HR 0.84 (95%CI 0.75-0.94; p = 0.002), respectively. CONCLUSIONS: Among over 2.5 million women, alcohol consumption was associated with a dose-dependent increased risk of BC, while alcohol consumption did not appear to worsen prognosis in patients with prior BC diagnosis.
Source: The Breast
Authors: Luca Arecco, Pedro M. Cacilhas, Camila Bobato Lara Gismondi, Marco Bruzzone, Gabriella Gentile, Riccardo Gerosa, Eva Blondeaux, Elisa Agostinetto, Chiara Dauccia, Soraia Lobo-Martins, Rafael Grochot, Kamal S. Saini, Hatem A. Azim, Marcio Debiasi, Alex De Caluwé, Laurence Buisseret, Lucia Del Mastro, Matteo Lambertini, Evandro de Azambuja
Institutions: Université Libre de Bruxelles, Institut Jules Bordet, University of Genoa, Inserm, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, Centre de recherche en Epidémiologie et Santé des Populations, Hospital Israelita Albert Einstein, IRCCS Azienda Ospedaliera Metropolitana, Policlinico Umberto I, Sapienza University of Rome, Humanitas University, University of Pavia, Sarah Cannon Research Institute, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital, Champalimaud Foundation
Language: English
Subfield: Pathology and Forensic Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,200
OpenAlex ID: W7128010005