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Postdiagnosis dietary factors, supplement use and breast cancer prognosis: Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis

Title: Postdiagnosis dietary factors, supplement use and breast cancer prognosis: Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis
Authors: Becerra-Tomas, N
Balducci, K
Abar, L
Aune, D
Cariolou, M
Greenwood, DC
Markozannes, G
Nanu, N
Vieira, R
Giovannucci, EL
Gunter, MJ
Jackson, AA
Kampman, E
Lund, V
Allen, K
Brockton, NT
Croker, H
Katsikioti, D
McGinley-Gieser, D
Mitrou, P
Wiseman, M
Cross, AJ
Riboli, E
Clinton, SK
McTiernan, A
Norat, T
Tsilidis, KK
Chan, DSM
Item Type: Journal Article
Abstract: Little is known about how diet might influence breast cancer prognosis. The current systematic reviews and meta-analyses summarise the evidence on postdiagnosis dietary factors and breast cancer outcomes from randomised controlled trials and longitudinal observational studies. PubMed and Embase were searched through 31st October 2021. Random-effects linear dose-response meta-analysis was conducted when at least three studies with sufficient information were available. The quality of the evidence was evaluated by an independent Expert Panel. We identified 108 publications. No meta-analysis was conducted for dietary patterns, vegetables, wholegrains, fish, meat, and supplements due to few studies, often with insufficient data. Meta-analysis was only possible for all-cause mortality with dairy, isoflavone, carbohydrate, dietary fibre, alcohol intake and serum 25-hydroxyvitamin D (25(OH)D), and for breast cancer-specific mortality with fruit, dairy, carbohydrate, protein, dietary fat, fibre, alcohol intake and serum 25(OH)D. The results, with few exceptions, were generally null. There was limited-suggestive evidence that predefined dietary patterns may reduce the risk of all-cause and other causes of death; that isoflavone intake reduces the risk of all-cause mortality (relative risk (RR) per 2 mg/day: 0.96, 95% confidence interval (CI): 0.92-1.02), breast cancer-specific mortality (RR for high vs low: 0.83, 95% CI: 0.64-1.07), and recurrence (RR for high vs low: 0.75, 95% CI: 0.61-0.92); that dietary fibre intake decreases all-cause mortality (RR per 10 g/day: 0.87, 95% CI: 0.80-0.94); and that serum 25(OH)D is inversely associated with all-cause and breast cancer-specific mortality (RR per 10 nmol/L: 0.93, 95% CI: 0.89-0.97 and 0.94, 95% CI: 0.90-0.99, respectively). The remaining associations were graded as limited-no conclusion.
Issue Date: 15-Feb-2023
Date of Acceptance: 23-Sep-2022
URI: http://hdl.handle.net/10044/1/100476
DOI: 10.1002/ijc.34321
ISSN: 0020-7136
Publisher: Wiley
Start Page: 616
End Page: 634
Journal / Book Title: International Journal of Cancer
Volume: 152
Issue: 4
Copyright Statement: © 2022 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Publication Status: Published
Online Publication Date: 2022-10-24
Appears in Collections:Faculty of Medicine
School of Public Health

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