title: Lack of symptom benefit following presumptive Helicobacter pylori eradication therapy in primary care.
abstract: BACKGROUND
  Helicobacter pylori eradication regimens have failure rates under 10%, however little information is available on the effect of treatment success in reducing the subsequent prescription of anti-ulcer medications in primary care.
  
  
  OBJECTIVE
  To determine, using a large prescription database in eastern Ireland, the success of presumptive eradication therapy in improving symptoms of dyspepsia in primary care, as judged by a reduction in the subsequent prescription of anti-ulcer medications.
  
  
  METHODS
  In a cross-sectional study, we identified 3847 patients who received a prescription for eradication therapy for Helicobacter pylori, including 826 who were followed for 9-11 months. Those who subsequently received anti-ulcer medications were deemed failures to obtain symptom relief.
  
  
  RESULTS
  For 3847 patients with a median follow-up of 8 months, the failure rate was 49%. Of 826 patients, followed for a longer period (9-11 months), the overall failure rate was 56% (range 44-62% depending on the eradication regimen used). Age over 65 years (hazard ratio=1.57, 95% confidence interval= 1.29-1.91, P < 0.001), prior use of anti-ulcer medications (hazard ratio=1.97, 95% confidence interval=1.63-2.37, P < 0.001) and prior use of aspirin/NSAIDs (hazard ratio=1.43, 95% confidence interval=1.18-1.73, P < 0.001) all predicted failure to obtain relief of symptoms of dyspepsia from eradication therapy.
  
  
  CONCLUSIONS
  Such high failure rates of eradication therapy in reducing the subsequent consumption of anti-ulcer medications have both clinical and economic implications for the use of eradication therapy for Helicobacter pylori in primary care.
authors.affiliation: Department of Pharmacology and Therapeutics, Trinity Centre for Health Sciences, St James Hospital, Dublin, Ireland. williamd@tcd.ie
authors.forename: D
authors.initials: D
authors.lastname: Williams
authors.forename: P
authors.initials: P
authors.lastname: O'Kelly
authors.forename: A
authors.initials: A
authors.lastname: Kelly
authors.forename: J
authors.initials: J
authors.lastname: Feely
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects; D000897:Anti-Ulcer Agents / Q000627:therapeutic use*; D003430:Cross-Sectional Studies; D016208:Databases, Factual; D004415:Dyspepsia / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy* / Q000473:pathology*; D016480:Helicobacter pylori / Q000472:pathogenicity*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011320:Primary Health Care; D012307:Risk Factors; D016896:Treatment Outcome
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000897:Anti-Ulcer Agents