Up to one-third of breast cancer cases in post-menopausal Mediterranean women might be avoided by modifying lifestyle habits: the EPIC Italy study.

Giovanna Masala, Benedetta Bendinelli, Melania Assedi, Daniela Occhini, Ines Zanna, Sabina Sieri, Claudia Agnoli, Carlotta Sacerdote, Fulvio Ricceri, Amalia Mattiello, Salvatore Panico, Rosario Tumino, Graziella Frasca, Calogero Saieva, Domenico Palli

Research output: Contribution to journalArticle

Abstract

PURPOSE: Breast cancer (BC) is the most frequent cancer among women in developed countries. Physical activity (PA), body mass index (BMI), and alcohol intake have been identified as relevant lifestyle modifiable risk factors for post-menopausal BC. We aimed to evaluate the role of these factors in modulating post-menopausal BC risk and to estimate the proportion of BC cases attributable to low PA, high BMI, and alcohol taking into account non-modifiable factors. METHODS: In the Italian section of the EPIC study, 15,010 post-menopausal women were recruited and provided information about dietary and lifestyle habits including PA, smoking, reproductive history, and anthropometric measurements. During 14.8 years of median follow-up, 672 incident BC cases (607 invasive and 65 in situ) were identified. RESULTS: In multivariate models, inverse associations with BC risk emerged for increasing level of total (p trend 0.02), leisure time (p trend 0.04), and occupational (p trend 0.007) PA. High BMI (HR 1.21; 95% CI 1.02-1.43 and HR 1.33; 95% CI 1.06-1.65 for overweight and obesity, respectively) and alcohol consumption higher than 10 g/day (HR 1.30; 95% CI 1.09-1.54) were associated with BC risk. We estimated that 30% (95% CI 8-50 of post-menopausal BC cases would be avoided through an increase of leisure time PA, a BMI below 25.0, and consuming no more than one drink/day. CONCLUSIONS: This large study carried out in Mediterranean women confirms the role of PA, BMI, and alcohol consumption in modulating post-menopausal BC risk and supports the potential benefits obtainable by modifying these lifestyle factors.
Original languageUndefined/Unknown
Pages (from-to)311-320
Number of pages10
JournalBreast Cancer Research and Treatment
Volume161
Issue number2
DOIs
Publication statusPublished - Jan 1 2017

Keywords

  • Alcohol, Body mass index, Physical activity, Population attributable risk, Post-menopausal breast cancer, Prospective study

Cite this

Masala, G., Bendinelli, B., Assedi, M., Occhini, D., Zanna, I., Sieri, S., Agnoli, C., Sacerdote, C., Ricceri, F., Mattiello, A., Panico, S., Tumino, R., Frasca, G., Saieva, C., & Palli, D. (2017). Up to one-third of breast cancer cases in post-menopausal Mediterranean women might be avoided by modifying lifestyle habits: the EPIC Italy study. Breast Cancer Research and Treatment, 161(2), 311-320. https://doi.org/10.1007/s10549-016-4047-x