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No association between coffee, tea or caffeine consumption and breast cancer risk in a prospective cohort study

  • Guy Fagherazzi (a1) (a2), Marina S Touillaud (a1) (a2), Marie-Christine Boutron-Ruault (a1) (a2), Françoise Clavel-Chapelon (a1) (a2) and Isabelle Romieu (a3)...
Abstract
AbstractObjective

Numerous mechanisms for the effects of coffee, tea and caffeine on the risk of breast cancer have been suggested. Caffeine intake has already been associated with high plasma levels of female hormones, but associations have not been clearly demonstrated in epidemiological studies.

Design

We examined prospectively the association of coffee, tea and caffeine consumption with breast cancer risk in a French cohort study.

Setting

Dietary information was obtained from a 208-item diet history questionnaire self-administered in 1993–1995. Multivariable Cox proportional hazards regression models were used to estimate hazards ratios and 95 % confidence intervals.

Subjects

The study was conducted on 67 703 women with available dietary information. During a median follow-up of 11 years, 2868 breast cancer cases were diagnosed.

Results

Median intake was 280 ml/d (2·2 cups/d) for coffee and 214 ml/d (1·7 cups/d) for tea. Median caffeine intake was 164 mg/d. No association was found between consumption of coffee, tea or caffeine and breast cancer risk. Sub-analyses by tumour receptor status, menopausal status, type of coffee (regular or decaffeinated) and meals at which beverages were drunk led to the same conclusion.

Conclusions

Results from this prospective study showed no relationship between coffee, tea or caffeine intake and breast cancer risk overall or by hormone receptor status.

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Corresponding author
*Corresponding author: Email clavel@igr.fr
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5. SC Larsson , L Bergkvist & A Wolk (2009) Coffee and black tea consumption and risk of breast cancer by estrogen and progesterone receptor status in a Swedish cohort. Cancer Causes Control (Epublication ahead of print version).

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Public Health Nutrition
  • ISSN: 1368-9800
  • EISSN: 1475-2727
  • URL: /core/journals/public-health-nutrition
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