title: Pre-treatment urea breath test results predict the efficacy of Helicobacter pylori eradication therapy in patients with active duodenal ulcers.
abstract: OBJECTIVE
  To evaluate the association of pre-treatment (13)C-urea breath test (UBT) results with H pylori density and efficacy of eradication therapy in patients with active duodenal ulcers.
  
  
  METHODS
  One hundred and seventeen consecutive outpatients with active duodenal ulcer and H pylori infection were recruited. H pylori density was histologically graded according to the Sydney system. Each patient received lansoprazole (30 mg b.i.d.), clarithromycin (500 mg b.i.d.) and amoxicillin (1 g b.i.d.) for 1 week. According to pre-treatment UBT values, patients were allocated into low (<16 per thousand), intermediate (16-35 per thousand), and high (>35 per thousand) UBT groups.
  
  
  RESULTS
  A significant correlation was found between pre-treatment UBT results and H pylori density (P<0.001). H pylori eradication rates were 94.9%, 94.4% and 81.6% in the low, intermediate and high UBT groups, respectively (per protocol analysis, P=0.11). When patients were assigned into two groups (UBT results < or =35 per thousand and >35 per thousand), the eradication rates were 94.7% and 81.6%, respectively (P=0.04).
  
  
  CONCLUSIONS
  The intragastric bacterial load of H pylori can be evaluated by UBT, and high pre-treatment UBT results can predict an adverse outcome of eradication therapy.
authors.affiliation: Department of Internal Medicine, Cathay General Hospital, 280 Jen-Ai Road, Section 4, Taipei 106, Taiwan, China. yungchihlai@hotmail.com
authors.forename: Yung-Chih
authors.initials: YC
authors.lastname: Lai
authors.forename: Jyh-Chin
authors.initials: JC
authors.lastname: Yang
authors.forename: Shih-Hung
authors.initials: SH
authors.lastname: Huang
mesh_terms: D000900:Anti-Bacterial Agents; D001944:Breath Tests; D004359:Drug Therapy, Combination / Q000627:therapeutic use*; D004381:Duodenal Ulcer / Q000382:microbiology*; D016481:Helicobacter Infections / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects; D006801:Humans; D011379:Prognosis; D016896:Treatment Outcome; D014508:Urea
chemical_list: D000900:Anti-Bacterial Agents; D014508:Urea