title: Triple vs. quadruple therapy for treating Helicobacter pylori infection: a meta-analysis.
abstract: BACKGROUND
  Triple therapy (proton pump inhibitor, clarithromycin and amoxicillin or an imidazole) is the first-line treatment for Helicobacter pylori infection. However, the effectiveness of triple therapy is decreasing due to the increase in antibiotic resistance. Quadruple therapy (proton pump inhibitor, tetracycline, metronidazole and a bismuth salt) is a very effective regimen even in areas of high prevalence of antibiotic resistance, and may be an alternative first-line treatment.
  
  
  OBJECTIVE
  To compare triple vs. quadruple therapy for the first-line treatment of H. pylori infection.
  
  
  METHODS
  An extensive literature search was performed to identify randomized trials comparing triple vs. quadruple therapy. Selected trials were included in a meta-analysis using Review Manager 4.1.
  
  
  RESULTS
  Four studies met the inclusion criteria. Eradication rates with quadruple therapy were slightly higher in both the intention-to-treat (81% vs. 78%; odds ratio, 0.83; 95% confidence interval, 0.61-1.14) and per protocol (88% vs. 85%; odds ratio, 0.81; 95% confidence interval, 0.55-1.20) analysis, although the differences were not statistically significant. Nor were there significant differences in compliance or adverse effects between the therapies.
  
  
  CONCLUSIONS
  Triple and quadruple therapies seem to be roughly equivalent in terms of effectiveness, compliance and side-effects profile when administered as first-line treatment for H. pylori infection.
authors.affiliation: Servei de Medicina, Hospital de Sabadell, Institut Universitari Parc Taulí, Barcelona, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Gené
authors.forename: X
authors.initials: X
authors.lastname: Calvet
authors.forename: R
authors.initials: R
authors.lastname: Azagra
authors.forename: J P
authors.initials: JP
authors.lastname: Gisbert
mesh_terms: D000658:Amoxicillin / Q000008:administration & dosage; D000863:Antacids / Q000008:administration & dosage; D000900:Anti-Bacterial Agents / Q000008:administration & dosage*; D001729:Bismuth / Q000008:administration & dosage; D017291:Clarithromycin / Q000008:administration & dosage; D004050:Ditiocarb / Q000008:administration & dosage; D024881:Drug Resistance, Bacterial; D004359:Drug Therapy, Combination / Q000008:administration & dosage; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D008795:Metronidazole / Q000008:administration & dosage; D054328:Proton Pump Inhibitors; D016032:Randomized Controlled Trials as Topic; D013752:Tetracycline / Q000008:administration & dosage
chemical_list: D000863:Antacids; D000900:Anti-Bacterial Agents; D054328:Proton Pump Inhibitors; D008795:Metronidazole; D000658:Amoxicillin; D004050:Ditiocarb; D013752:Tetracycline; D017291:Clarithromycin; D001729:Bismuth