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Dietary intake of vitamins A, C, and E and the risk of colorectal adenoma: a meta-analysis of observational studies.
MedLine Citation:
PMID:  24064545     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
To comprehensively summarize the association between dietary intake of vitamins A, C, and E and the risk of colorectal adenoma (CRA), the precursor of colorectal cancer, relevant studies were identified in MEDLINE and EMBASE up to 31 October 2012. Summary relative risks (SRRs) with 95% confidence intervals (CIs) were pooled with a random-effects model. Between-study heterogeneity was assessed using Cochran's Q and I statistics. A total of 13 studies with 3832 CRA cases were included in this meta-analysis. On the basis of the highest versus lowest analysis, dietary intake of vitamin C reduced the risk of CRA by 22% (SRRs 0.78, 95% CIs: 0.62-0.98). Subgroup analyses showed that this relation was not modified by BMI, smoking status, and dietary energy intake. Further, dietary intake of β-carotene was also inversely associated with the risk of CRA. However, dietary intake of vitamins A and E was not associated with the risk of CRA in overall and subgroup analyses (vitamin A: SRRs 0.87, 95% CIs: 0.67-1.14; vitamin E: SRRs 0.87, 95% CIs: 0.69-1.10). Our results indicate that dietary intake of vitamin C and β-carotene, but not vitamins A and E, could reduce the risk of CRA. However, these associations seem to be limited. Further investigation using large samples and a rigorous methodology is warranted.
Authors:
Xiaodong Xu; Enda Yu; Lianjie Liu; Wei Zhang; Xubiao Wei; Xianhua Gao; Ning Song; Chuangang Fu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation (ECP)     Volume:  22     ISSN:  1473-5709     ISO Abbreviation:  Eur. J. Cancer Prev.     Publication Date:  2013 Nov 
Date Detail:
Created Date:  2013-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9300837     Medline TA:  Eur J Cancer Prev     Country:  England    
Other Details:
Languages:  eng     Pagination:  529-39     Citation Subset:  IM    
Affiliation:
Department of Colorectal Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China.
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