J-Z Zhu1, Y-M Wang, Q-Y Zhou, K-F Zhu, C-H Yu, Y-M Li. 1. Department of Gastroenterology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
Abstract
BACKGROUND: Studies on the relation between alcohol consumption and risk of colorectal adenoma (CRA), a precursor of colorectal cancer, have been inconsistent. AIM: A systematic review with meta-analysis was conducted to investigate the association and the dose-response of alcohol with CRA. METHODS: A literature search was performed on PubMed to identify relevant studies published up to January 2014. A fixed or random effects model was used to estimate summarised relative risks (RRs) and 95% confidence intervals (CIs) for the association between alcohol intake and CRA risk. Statistical heterogeneity between studies was assessed with the χ(2) statistic and quantified by I². RESULTS: Twenty-three case-control studies and two cohort studies were included in the meta-analysis. All drinkers were associated with 17% increased risk for CRA, compared with nondrinkers or occasional alcohol drinkers. The dose-response analysis demonstrated that for drinkers of 10, 25, 50 and 100 g/day alcohol consumption, the estimated RRs of CRA were 1.02 (95% CI 0.89-1.16), 1.06 (95% CI 0.92-1.20), 1.16 (95% CI 1.02-1.33) and 1.61 (95% CI 1.42-1.84) respectively, in comparison with non-/occasional drinkers. The risks were consistent in the subgroup analyses of gender and site of adenoma, while it was stronger in European studies than the studies in the US and Asia. CONCLUSIONS: This study suggests that alcohol intake is related to a significant increase of risk for colrectal adenoma.
BACKGROUND: Studies on the relation between alcohol consumption and risk of colorectal adenoma (CRA), a precursor of colorectal cancer, have been inconsistent. AIM: A systematic review with meta-analysis was conducted to investigate the association and the dose-response of alcohol with CRA. METHODS: A literature search was performed on PubMed to identify relevant studies published up to January 2014. A fixed or random effects model was used to estimate summarised relative risks (RRs) and 95% confidence intervals (CIs) for the association between alcohol intake and CRA risk. Statistical heterogeneity between studies was assessed with the χ(2) statistic and quantified by I². RESULTS: Twenty-three case-control studies and two cohort studies were included in the meta-analysis. All drinkers were associated with 17% increased risk for CRA, compared with nondrinkers or occasional alcohol drinkers. The dose-response analysis demonstrated that for drinkers of 10, 25, 50 and 100 g/day alcohol consumption, the estimated RRs of CRA were 1.02 (95% CI 0.89-1.16), 1.06 (95% CI 0.92-1.20), 1.16 (95% CI 1.02-1.33) and 1.61 (95% CI 1.42-1.84) respectively, in comparison with non-/occasional drinkers. The risks were consistent in the subgroup analyses of gender and site of adenoma, while it was stronger in European studies than the studies in the US and Asia. CONCLUSIONS: This study suggests that alcohol intake is related to a significant increase of risk for colrectal adenoma.
Authors: Markus D Knudsen; Thomas de Lange; Edoardo Botteri; Dung-Hong Nguyen; Helge Evensen; Chloé B Steen; Geir Hoff; Tomm Bernklev; Anette Hjartåker; Paula Berstad Journal: World J Gastroenterol Date: 2016-07-21 Impact factor: 5.742
Authors: Zahra Montazeri; Evropi Theodoratou; Christine Nyiraneza; Maria Timofeeva; Wanjing Chen; Victoria Svinti; Shanya Sivakumaran; Gillian Gresham; Laura Cubitt; Luis Carvajal-Carmona; Monica M Bertagnolli; Ann G Zauber; Ian Tomlinson; Susan M Farrington; Malcolm G Dunlop; Harry Campbell; Julian Little Journal: Int J Epidemiol Date: 2015-10-07 Impact factor: 7.196
Authors: Faraz Bishehsari; Abdulrahman Saadalla; Khashayarsha Khazaie; Phillip A Engen; Robin M Voigt; Brandon B Shetuni; Christopher Forsyth; Maliha Shaikh; Martha Hotz Vitaterna; Fred Turek; Ali Keshavarzian Journal: Int J Mol Sci Date: 2016-12-02 Impact factor: 5.923