title: First-line eradication of H pylori infection in Europe: a meta-analysis based on congress abstracts, 1997-2004.
abstract: OBJECTIVE
  To meta-analyse the European abstracts presented between 1997-2004 at the European H pylori Study Group, United European Gastroenterology Week meetings and World Congresses of Gastroenterology.
  
  
  METHODS
  The abstracts of randomized/controlled prospective studies were classified into groups based on first-line eradication schedules. The quality of the abstracts was checked by a validated score system. The pooled eradication rates (PER) and combined odds ratios (OR) were calculated and compared with the published meta-analyses.
  
  
  RESULTS
  The PER of proton pump inhibitor-based (PPI) one week triple therapies was 81.4% (confidence interval, 95% CI: 78.5-84.5). Ranitidine bismuth citrate-based (RBC) triple regimens have an efficiency rate of 78.5% (95% CI: 70.5%-84.3%) (P = 0.28 vs PPI). The OR for PPI effect vs RBC regimens was 1.1 (95% CI: 0.92-1.30). H(2) receptor antagonist-based triple therapies achieved 64.1% (95% CI: 52.6-75.6) (P = 0.02 < 0.05 vs PPI), the OR vs PPI regimens was 1.55 (95% CI: 0.72-3.78). PPI-based double combinations were less efficient than triple regimens (PER: 55.0%, OR: 4.90, 95% CI: 2.36-9.70). Quadruple regimens were successful in 82.6% (95% CI: 76.0-89.7), the OR vs triple therapies was 0.80 (0.62-1.03). Clarithromycin + amoxicillin or nitroimidazole combinations were efficient in 80.5% (95% CI: 77.2-84.2) and 83.8% (95% CI: 81.7-85.9), respectively. Amoxicillin + nitromidazole therapies eradicated the infection in 73.5% (66.6-78.5) (P = 0.01 < 0.05 vs clarithromycin-based regimens).
  
  
  CONCLUSIONS
  PPI/RBC-based triple therapies achieved comparable results with the meta-analyses. H(2)-receptor antagonists and PPI-based double combinations were less efficient. Triple and quadruple regimens were equally effective. Clarithromycin + either amoxicillin or nitroimidazole containing regimens were more effective than amoxicillin + nitroimidazole combinations. High quality congress abstracts constitutes a valuable pool of data which is suitable for meta-analytical workup.
authors.affiliation: Ferencvaros Health Center, Gastroenterology, 1095 Budapest, Mester utca 45, Hungary. drgybuzas@hotmail.com
authors.forename: György M
authors.initials: GM
authors.lastname: Buzás
authors.forename: Jolán
authors.initials: J
authors.lastname: Józan
mesh_terms: D000890:Anti-Infective Agents / Q000378:metabolism; D001729:Bismuth / Q000494:pharmacology; D004359:Drug Therapy, Combination; D005060:Europe; D016481:Helicobacter Infections / Q000175:diagnosis* / Q000628:therapy*; D016480:Helicobacter pylori / Q000378:metabolism*; D006801:Humans; D017494:Proton Pumps / Q000378:metabolism; D011899:Ranitidine / Q000031:analogs & derivatives / Q000494:pharmacology; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000890:Anti-Infective Agents; D017494:Proton Pumps; C073340:ranitidine bismuth citrate; D011899:Ranitidine; D001729:Bismuth