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Efficacy of vitamin D supplementation in combination with conventional antiviral therapy in patients with chronic hepatitis C infection: a meta-analysis of randomised controlled trials

Authors
 H-B Kim  ;  S-K Myung  ;  Y-J Lee  ;  B-J Park 
Citation
 Journal of Human Nutrition and Dietetics, Vol.31(2) : 168-177, 2018 
Journal Title
 Journal of Human Nutrition and Dietetics 
ISSN
 0952-3871 
Issue Date
2018
Keywords
antiviral therapy ; chronic hepatitis C ; meta-analysis ; randomised controlled trials ; vitamin D supplementation
Abstract
BACKGROUND: Although a contributory role of vitamin D levels for the development of chronic hepatitis C has been suggested, the efficacy of vitamin D supplementation in combination with conventional antiviral therapy consisting of pegylated interferon-alpha (Peg-IFN-alpha) injection and oral ribavirin (RBV) remains unclear. We investigated its efficacy in the treatment of chronic hepatitis C via a meta-analysis of randomised controlled trials. METHODS: We searched PubMed, EMBASE, the Cochrane Library, ClinicalTrials.gov and the bibliographies of relevant articles to locate additional publications in September 2016. Three evaluators independently reviewed and selected eligible studies based on predetermined selection criteria. RESULTS: Of 522 articles meeting our initial criteria, a total of seven open-label, randomised controlled trials involving 548 participants, were included in the final analysis. Vitamin D supplementation in combination with Peg-IFN-alpha injection and oral RBV significantly increased the rate of viral response for hepatitis C at 24 weeks after treatment in a random-effects meta-analysis (relative risk = 1.30; 95% confidence interval = 1.04-1.62; I(2) = 75.9%). Also, its significant efficacy was observed in patients with hepatitis C virus genotype 1, which is known to be refractory to antiviral therapy. CONCLUSIONS: In summary, we observed that additional use of vitamin D has a positive effect on sustained viral response rates of patients with chronic hepatitis C infection. However, we cannot establish the efficacy because of substantial heterogeneity, a small sample size and a low methodological quality.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/162527
Full Text
https://onlinelibrary.wiley.com/doi/abs/10.1111/jhn.12503
DOI
10.1111/jhn.12503
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Family Medicine (가정의학교실)
Yonsei Authors
박병진(Park, Byoung Jin) ORCID logo https://orcid.org/0000-0003-1733-5301
이용제(Lee, Yong Jae) ORCID logo https://orcid.org/0000-0002-6697-476X
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