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Abstract Title:

Fruit and vegetable consumption and breast cancer incidence: Repeated measures over 30 years of follow-up.

Abstract Source:

Int J Cancer. 2018 Jul 6. Epub 2018 Jul 6. PMID: 29978479

Abstract Author(s):

Maryam S Farvid, Wendy Y Chen, Bernard A Rosner, Rulla M Tamimi, Walter C Willett, A Heather Eliassen

Article Affiliation:

Maryam S Farvid

Abstract:

We evaluated the relation of fruit and vegetable consumption, including specific fruits and vegetables, with incident breast cancer characterized by menopausal status, hormone receptor status, and molecular subtypes. Fruit and vegetable consumption, cumulatively averaged across repeated, validated questionnaires, was examined in relation to risk of invasive breast cancer among 182,145 women initially aged 27-59y in the Nurses' Health Study (NHS, 1980-2012) and NHSII (1991-2013). Cox proportional hazards regression, adjusted for known risk factors, was used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs), and assessed tumors by hormone receptor status and molecular subtypes. We prospectively documented 10,911 invasive breast cancer cases. Greater intake of total fruits and vegetables, especially cruciferous and yellow/orange vegetables, was associated with significantly lower breast cancer risk (>5.5 versus≤2.5 servings/day HR=0.89, 95%CI=0.83-0.96; P=0.005). Intake of total vegetables was especially associated with lower risk of estrogen receptor negative tumors (HR per 2 additional servings/day as a continuous variable=0.85, 95%CI=0.77-0.93; P=0.02). Among molecular subtypes, higher intake of total fruits and vegetables (HR per 2 additional servings/day as a continuous variable) was most strongly associated with lower risk of human epidermal growth factor receptor 2 (HER2)-enriched (HR=0.78, 95%CI=0.66-0.92), basal-like (HR=0.85, 95%CI=0.73-0.99), and luminal A (HR=0.94, 95%CI=0.89-0.99), but not with luminal B tumors (P=0.03). In conclusion, our findings support that higher intake of fruits and vegetables, and specifically cruciferous and yellow/orange vegetables, may reduce the risk of breast cancer, especially those that are more likely to be aggressive tumors. This article is protected by copyright. All rights reserved.

Study Type : Human Study

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Sayer Ji
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