title: Comparison of 1 and 2 weeks of omeprazole, amoxicillin and clarithromycin treatment for Helicobacter pylori eradication: the HYPER Study.
abstract: BACKGROUND
  Triple therapy is recommended for Helicobacter pylori eradication, yet consensus on the duration of treatment is lacking.
  
  
  OBJECTIVE
  To compare the efficacy and safety of 1- and 2-week regimens of omeprazole, amoxicillin and clarithromycin in a large, multicentre, double-blind and randomised study.
  
  
  METHODS
  A total of 909 H pylori-positive patients with duodenal ulcer, enrolled in 81 endoscopy units in Italy, were randomised to receive omeprazole, amoxicillin and clarithromycin for either 1 week (OAC1W) or 2 weeks (OAC2W) or omeprazole and amoxicillin for 2 weeks. H pylori eradication was assessed by histological examination and carbon-13 urea breath test 4 weeks after treatment.
  
  
  RESULTS
  Both the intention-to-treat (ITT; n = 907) and per protocol (PP; n = 661) analyses showed no significant differences between the eradication rates of OAC1W (ITT 79.7%; PP 83.6%) and OAC2W (ITT 81.7%; PP 84.9%; ITT p = 0.53; PP p = 0.71). Both triple omeprazole, amoxicillin and clarithromycin regimens gave significantly higher eradication rates compared with omeprazole and amoxicillin treatment (ITT 44.6%; PP 42.8%; p<0.001). Poor compliance was reported in 18.6%, 17.3% and 15.1% (p = 0.51) of patients for OAC2W, OAC1W and omeprazole and amoxicillin, respectively. Adverse events occurred in 9.9% and 9.6% (p = 0.88) of patients for OAC2W and OAC1W, respectively, and in 5.9% for omeprazole and amoxicillin (p = 0.11).
  
  
  CONCLUSIONS
  1-week and 2-week triple treatments for H pylori eradication are similar in terms of efficacy, safety and patient compliance.
authors.affiliation: Department of Internal Medicine and Gastroenterology, University of Bologna, Bologna, Italy.
authors.forename: Rocco Maurizio
authors.initials: RM
authors.lastname: Zagari
authors.forename: Gabriele
authors.initials: G
authors.lastname: Bianchi-Porro
authors.forename: Roberto
authors.initials: R
authors.lastname: Fiocca
authors.forename: Giovanni
authors.initials: G
authors.lastname: Gasbarrini
authors.forename: Enrico
authors.initials: E
authors.lastname: Roda
authors.forename: Franco
authors.initials: F
authors.lastname: Bazzoli
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000658:Amoxicillin / Q000008:administration & dosage / Q000009:adverse effects; D000900:Anti-Bacterial Agents / Q000008:administration & dosage* / Q000009:adverse effects; D001944:Breath Tests; D017291:Clarithromycin / Q000008:administration & dosage / Q000009:adverse effects; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D004381:Duodenal Ulcer / Q000188:drug therapy / Q000382:microbiology; D005260:Female; D016481:Helicobacter Infections / Q000150:complications / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage / Q000009:adverse effects; D010349:Patient Compliance; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D000658:Amoxicillin; D017291:Clarithromycin; D009853:Omeprazole