title: Helicobacter pylori eradication therapy for functional dyspepsia: Systematic review and meta-analysis.
abstract: OBJECTIVE
  To evaluate whether Helicobacter pylori (H. pylori) eradication therapy benefits patients with functional dyspepsia (FD).
  
  
  METHODS
  Randomized controlled trials (RCTs) investigating the efficacy and safety of H. pylori eradication therapy for patients with functional dyspepsia published in English (up to May 2015) were identified by searching PubMed, EMBASE, and The Cochrane Library. Pooled estimates were measured using the fixed or random effect model. Overall effect was expressed as a pooled risk ratio (RR) or a standard mean difference (SMD). All data were analyzed with Review Manager 5.3 and Stata 12.0.
  
  
  RESULTS
  This systematic review included 25 RCTs with a total of 5555 patients with FD. Twenty-three of these studies were used to evaluate the benefits of H. pylori eradication therapy for symptom improvement; the pooled RR was 1.23 (95%CI: 1.12-1.36, P < 0.0001). H. pylori eradication therapy demonstrated symptom improvement during long-term follow-up at ≥ 1 year (RR = 1.24; 95%CI: 1.12-1.37, P < 0.0001) but not during short-term follow-up at < 1 year (RR = 1.26; 95%CI: 0.83-1.92, P = 0.27). Seven studies showed no benefit of H. pylori eradication therapy on quality of life with an SMD of -0.01 (95%CI: -0.11 to 0.08, P = 0.80). Six studies demonstrated that H. pylori eradication therapy reduced the development of peptic ulcer disease compared to no eradication therapy (RR = 0.35; 95%CI: 0.18-0.68, P = 0.002). Eight studies showed that H. pylori eradication therapy increased the likelihood of treatment-related side effects compared to no eradication therapy (RR = 2.02; 95%CI: 1.12-3.65, P = 0.02). Ten studies demonstrated that patients who received H. pylori eradication therapy were more likely to obtain histologic resolution of chronic gastritis compared to those who did not receive eradication therapy (RR = 7.13; 95%CI: 3.68-13.81, P < 0.00001).
  
  
  CONCLUSIONS
  The decision to eradicate H. pylori in patients with functional dyspepsia requires individual assessment.
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Du
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: Bin-Rui
authors.initials: BR
authors.lastname: Chen
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: John J
authors.initials: JJ
authors.lastname: Kim
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: Sarah
authors.initials: S
authors.lastname: Kim
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Shen
authors.affiliation: Li-Jun Du, Bin-Rui Chen, John J Kim, Sarah Kim, Jin-Hua Shen, Ning Dai, Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310020, Zhejiang Province, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Dai
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D016009:Chi-Square Distribution; D004359:Drug Therapy, Combination; D004415:Dyspepsia / Q000175:diagnosis / Q000188:drug therapy* / Q000382:microbiology; D005260:Female; D016481:Helicobacter Infections / Q000175:diagnosis / Q000188:drug therapy* / Q000382:microbiology; D016480:Helicobacter pylori / Q000187:drug effects* / Q000472:pathogenicity; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D054328:Proton Pump Inhibitors / Q000627:therapeutic use*; D012074:Remission Induction; D012307:Risk Factors; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D054328:Proton Pump Inhibitors
keywords: Functional dyspepsia; Helicobacter pylori eradication; Meta-analysis; Peptic ulceration; Quality of life; Symptom improvement