Coffee Intake Decreases Risk of Postmenopausal Breast Cancer: A Dose-Response Meta-Analysis on Prospective Cohort Studies

Alessandra Lafranconi, Agnieszka Micek, Paolo De Paoli, Sabrina Bimonte, Paola Rossi, Vincenzo Quagliariello, Massimiliano Berretta*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Web of Science)

Abstract

Aim: A dose-response meta-analysis was conducted in order to summarize the evidence from prospective cohort studies regarding the association between coffee intake and breast cancer risk. Methods: A systematic search was performed in electronic databases up to March 2017 to identify relevant studies; risk estimates were retrieved from the studies and linear and non-linear dose-response analysis modelled by restricted cubic splines was conducted. A stratified and subgroup analysis by menopausal and estrogen/progesterone receptor (ER/PR) status, smoking status and body mass index (BMI) were performed in order to detect potential confounders. Results: A total of 21 prospective studies were selected either for dose-response, the highest versus lowest category of consumption or subgroup analysis. The dose-response analysis of 13 prospective studies showed no significant association between coffee consumption and breast cancer risk in the non-linear model. However, an inverse relationship has been found when the analysis was restricted to post-menopausal women. Consumption of four cups of coffee per day was associated with a 10% reduction in postmenopausal cancer risk (relative risk, RR 0.90; 95% confidence interval, CI 0.82 to 0.99). Subgroup analyses showed consistent results for all potential confounding factors examined. Conclusions: Findings from this meta-analysis may support the hypothesis that coffee consumption is associated with decreased risk of postmenopausal breast cancer.
Original languageEnglish
Article number112
Number of pages17
JournalNutrients
Volume10
Issue number2
DOIs
Publication statusPublished - 1 Feb 2018

Keywords

  • coffee
  • caffeine
  • breast cancer
  • receptor
  • postmenopausal
  • dose-response
  • meta-analysis
  • METABOLIC SYNDROME
  • TEA CONSUMPTION
  • CAFFEINE INTAKE
  • MOLECULAR-MECHANISMS
  • TREND ESTIMATION
  • NORWEGIAN WOMEN
  • DIETARY PATTERN
  • NO ASSOCIATION
  • GREEN TEA
  • HEALTH

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