Association between Mediterranean diet adherence and colorectal cancer: a dose-response meta-analysis
Yuan Zhong, Yan Zhu, Quanpeng Li, Fei Wang, Xianxiu Ge, Guangxin Zhou, Lin Miao, Yuan Zhong, Yan Zhu, Quanpeng Li, Fei Wang, Xianxiu Ge, Guangxin Zhou, Lin Miao
Abstract
Background: Mounting epidemiologic studies have investigated the potential inverse association between Mediterranean diet (MD) adherence and colorectal cancer (CRC) incidence and mortality.
Objectives: This meta-analysis aimed to investigate the association between MD adherence and CRC incidence and mortality.
Methods: PubMed, Embase, and Web of Science were searched to identify eligible studies through September 2019. A random-effects model was used to estimate summary RRs and 95% CIs.
Results: This meta-analysis included 13 prospective cohort studies, of which 9 reported CRC incidence and 5 reported CRC mortality. The summary RR of CRC incidence was 0.90 (95% CI: 0.84, 0.96) for highest compared with lowest MD adherence and 0.96 (95% CI: 0.94, 0.99) per 2-score increase in MD adherence. The summary RRs for highest compared with lowest MD adherence were 0.82 for rectal cancer (95% CI: 0.71, 0.95), 0.94 for proximal colon cancer (95% CI: 0.87, 1.02), and 0.91 for distal colon cancer (95% CI: 0.79, 1.04). Neither the summary HR of overall mortality for highest compared with lowest pre- and postdiagnosis MD adherence, nor the summary HR of CRC-specific mortality for highest compared with lowest prediagnosis MD adherence achieved a value with statistical significance.
Conclusions: Our meta-analysis supports the inverse association of MD adherence with CRC incidence, but not with overall mortality or CRC-specific mortality among those diagnosed with CRC.
Keywords: Mediterranean diet; colorectal cancer; dose-response meta-analysis; epidemiology; nutrition.
Copyright © The Author(s) on behalf of the American Society for Nutrition 2020.
Source: PubMed