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Is gallstone disease associated with inflammatory bowel diseases? A meta-analysis
Fen Ming Zhang1, Cheng Fu Xu1, Guo Dong Shan1
1Department of Gastroenterology, First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.
Objective:
To investigate the association between inflammatory bowel disease (IBD) and gallstone disease (GD) by performing a meta-analysis.
Methods:
PubMed, Medline, Embase, Web of Science and the Cochrane Library were searched for relevant articles published between January 1980 and February 2015. All statistical analyses were performed using STATA 12.0. A fixed-effects model was adopted; heterogeneity was evaluated by χ(2) test and I(2) statistic; publication bias was assessed by Begg's and Egger's tests.
Results:
Five studies qualified for inclusion in the meta-analysis. Patients with IBD had a significantly higher prevalence of GD than those in the control group [odds ratio (OR) 1.72, 95% confidence interval (CI) 1.40-2.12, P < 0.0001]. Subgroup analyses showed a significantly higher prevalence of GD in patients with Crohn's disease (CD) (OR 2.05, 95% CI 1.61-2.63, P < 0.0001). However, no significant difference in the prevalence of GD was observed between patients with ulcerative colitis (UC) and controls (OR 1.12, 95% CI 0.75-1.68, P = 0.585). Studies from Italy, Sweden and the UK revealed a higher prevalence of GD in patients with IBD. No heterogeneity (I(2) = 25.2%, P = 0.228) or publication bias was observed in our meta-analysis (Begg's test, P = 0.711; Egger's test, P = 0.805).
Conclusions:
Our meta-analysis suggests there is a trend towards higher prevalence of GD in IBD patients, and especially in patients with CD. More rigorous, large-scale multi-center studies are required to investigate the association between GD and IBD.
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