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Open AccessReview

Diet Quality and Cancer Outcomes in Adults: A Systematic Review of Epidemiological Studies

1
School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan 2308, Australia
2
Department of Rural Health, University of Newcastle, Tamworth 2308, Australia
3
Priority Research Centre for Physical Activity and Nutrition, University of Newcastle, Callaghan 2308, Australia
4
Priority Research Centre for Gender, Health and Ageing, University of Newcastle, Callaghan 2308, Australia
5
School of Medicine and Public Health, Faculty of Health and Medicine, University of Newcastle, Callaghan 2308, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Vicki Flood
Int. J. Mol. Sci. 2016, 17(7), 1052; https://doi.org/10.3390/ijms17071052
Received: 29 April 2016 / Revised: 6 June 2016 / Accepted: 20 June 2016 / Published: 5 July 2016
(This article belongs to the Special Issue Advances in Nutritional Epidemiology)
Dietary patterns influence cancer risk. However, systematic reviews have not evaluated relationships between a priori defined diet quality scores and adult cancer risk and mortality. The aims of this systematic review are to (1) describe diet quality scores used in cohort or cross-sectional research examining cancer outcomes; and (2) describe associations between diet quality scores and cancer risk and mortality. The protocol was registered in Prospero, and a systematic search using six electronic databases was conducted through to December 2014. Records were assessed for inclusion by two independent reviewers, and quality was evaluated using a validated tool. Sixty-four studies met inclusion criteria from which 55 different diet quality scores were identified. Of the 35 studies investigating diet quality and cancer risk, 60% (n = 21) found a positive relationship. Results suggest no relationship between diet quality scores and overall cancer risk. Inverse associations were found for diet quality scores and risk of postmenopausal breast, colorectal, head, and neck cancer. No consistent relationships between diet quality scores and cancer mortality were found. Diet quality appears to be related to site-specific adult cancer risk. The relationship with cancer mortality is less conclusive, suggesting additional factors impact overall cancer survival. Development of a cancer-specific diet quality score for application in prospective epidemiology and in public health is warranted. View Full-Text
Keywords: cancer; diet quality index; risk and mortality; systematic review cancer; diet quality index; risk and mortality; systematic review
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MDPI and ACS Style

Potter, J.; Brown, L.; Williams, R.L.; Byles, J.; Collins, C.E. Diet Quality and Cancer Outcomes in Adults: A Systematic Review of Epidemiological Studies. Int. J. Mol. Sci. 2016, 17, 1052. https://doi.org/10.3390/ijms17071052

AMA Style

Potter J, Brown L, Williams RL, Byles J, Collins CE. Diet Quality and Cancer Outcomes in Adults: A Systematic Review of Epidemiological Studies. International Journal of Molecular Sciences. 2016; 17(7):1052. https://doi.org/10.3390/ijms17071052

Chicago/Turabian Style

Potter, Jennifer; Brown, Leanne; Williams, Rebecca L.; Byles, Julie; Collins, Clare E. 2016. "Diet Quality and Cancer Outcomes in Adults: A Systematic Review of Epidemiological Studies" Int. J. Mol. Sci. 17, no. 7: 1052. https://doi.org/10.3390/ijms17071052

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Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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