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Abstract Title:

Dietary fiber intake and risk of renal cell carcinoma: evidence from a meta-analysis.

Abstract Source:

Med Oncol. 2014 Aug ;31(8):125. Epub 2014 Jul 20. PMID: 25038944

Abstract Author(s):

Tian-bao Huang, Pei-pei Ding, Jian-feng Chen, Yang Yan, Long Zhang, Huan Liu, Peng-cheng Liu, Jian-ping Che, Jun-hua Zheng, Xu-dong Yao

Article Affiliation:

Tian-bao Huang

Abstract:

The aim of this study was to investigate the possible relationships between dietary fiber intake and risk of renal cell carcinoma (RCC). Electronic databases including MEDLINE, EMBASE and Web of Science were searched to find eligible studies. Random-effects relative risk (RR) and its corresponding 95 % confidence interval (CI) were used. Besides, random-effects dose-response analyses were also performed to clarify the dose-response relations. Finally, publication bias was assessed by Egger's test and Begg's test. All p values were two tailed. Seven studies, including two cohort studies and five case-control studies, were eligible and included in this meta-analysis. Overall analysis in highest versus lowest level revealed that total dietary fiber intake was associated with reduced RCC risk (RR 0.84, 95 % CI 0.74-0.96). In addition, pooled estimated data showed that risk of RCC was significantly associated with vegetable and legume fiber intake (RR 0.70, RR 0.80, respectively), but not with fruit and cereal fiber intake (RR 0.92, RR 1.04, respectively). However, in dose-response analysis, no significant association was reported. Finally, no publication bias was detected by Egger's or Begg's test. The dietary fiber intake, especially vegetable and legume fiber, may be associated with reduced RCC risk. Considering the limitations of the included studies, more well-designed prospective studies will be needed to confirm our findings.

Study Type : Meta Analysis

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