UMMS Affiliation

Department of Medicine, Division of Preventive and Behavioral Medicine; UMass Worcester Prevention Research Center

Publication Date

2016-05-24

Document Type

Article

Disciplines

Clinical Epidemiology | Dietetics and Clinical Nutrition | Epidemiology | Neoplasms | Women's Health

Abstract

BACKGROUND: Diet modulates inflammation and inflammatory markers have been associated with cancer outcomes. In the Women's Health Initiative, we investigated associations between a dietary inflammatory index (DII) and invasive breast cancer incidence and death.

METHODS: The DII was calculated from a baseline food frequency questionnaire in 122 788 postmenopausal women, enrolled from 1993 to 1998 with no prior cancer, and followed until 29 August 2014. With median follow-up of 16.02 years, there were 7495 breast cancer cases and 667 breast cancer deaths. We used Cox regression to estimate multivariable-adjusted hazards ratios (HRs) and 95% confidence intervals (95% CIs) by DII quintiles (Q) for incidence of overall breast cancer, breast cancer subtypes, and deaths from breast cancer. The lowest quintile (representing the most anti-inflammatory diet) was the reference.

RESULTS: The DII was not associated with incidence of overall breast cancer (HRQ5vsQ1, 0.99; 95% CI, 0.91-1.07; Ptrend=0.83 for overall breast cancer). In a full cohort analysis, a higher risk of death from breast cancer was associated with consumption of more pro-inflammatory diets at baseline, after controlling for multiple potential confounders (HRQ5vsQ1, 1.33; 95% CI, 1.01-1.76; Ptrend=0.03).

CONCLUSIONS: Future studies are needed to examine the inflammatory potential of post-diagnosis diet given the suggestion from the current study that dietary inflammatory potential before diagnosis is related to breast cancer death.

Keywords

dietary inflammatory index, breast cancer, incidence, mortality, Women’s Health Initiative

Rights and Permissions

This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution-NonCommercial-Share Alike 4.0 Unported License.

DOI of Published Version

10.1038/bjc.2016.98

Source

Br J Cancer. 2016 May 24;114(11):1277-85. doi: 10.1038/bjc.2016.98. Epub 2016 Apr 21. Link to article on publisher's site

Journal/Book/Conference Title

British journal of cancer

Related Resources

Link to Article in PubMed

PubMed ID

27100730

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