title: Effect of Helicobacter pylori eradication in Iranian patients with functional dyspepsia: a prospective, randomized, placebo-controlled trial.
abstract: BACKGROUND
  Whether patients with functional dyspepsia (FD) should receive Helicobacter pylori (H. pylori) eradication therapy remains controversial. The objective of this trial was to evaluate the effect of H. pylori eradication therapy on dyspeptic symptoms of patients with FD.
  
  
  METHODS
  A prospective, randomized, placebo-controlled trial of H. pylori eradication for FD was conducted. A total of 720 FD patients diagnosed by Rome III criteria were consecutively enrolled. We randomly assigned 186 H. pylori infected patients with FD to receive quadruple therapy for 14 days and 173 such patients to receive identical-appearing placebos. Severity of abdominal symptoms was assessed with the Glasgow Dyspepsia Severity Score (GDSS), and eradication of H. pylori by (13)C-urea breath test was evaluated during one year.
  
  
  RESULTS
  The rate of eradication of H. pylori infection was 87.1% in the treatment group and 2.9% in the placebo group at 6 weeks (p = 0.001). The mean GDSS at 12 months was 4.9 ±2.8 in the treatment group, as compared to 5.2 ±3.4 in the placebo group (p = 0.064). The scores in both groups were lower than those at baseline. According to the intention-to-treat analysis, at 12 months, there was no significant difference between groups in the rate of successful treatment (48.6% in the treatment group and 51.2% in the placebo group; p = 0.84). There was no significant difference in mean symptom scores between the two treatment groups at any point during follow-up.
  
  
  CONCLUSIONS
  The results of our study provide no evidence that H. pylori eradication leads to relief of symptoms 12 months after treatment, and there is a need for further studies.
authors.affiliation: Department of Internal Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Yazdanbod
authors.affiliation: Department of Internal Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran.
authors.forename: Sina
authors.initials: S
authors.lastname: Salimian
authors.affiliation: Department of Infectious Disease and Tropical Medicine, Imam Khomeini Hospital, Ardabil University of Medical Science, Ardabil, Iran.
authors.forename: Shahram
authors.initials: S
authors.lastname: Habibzadeh
authors.affiliation: Department of Internal Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran.
authors.forename: Afshin
authors.initials: A
authors.lastname: Hooshyar
authors.affiliation: Department of Internal Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran.
authors.forename: Nasrollah
authors.initials: N
authors.lastname: Maleki
authors.affiliation: Department of Internal Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Norouzvand
keywords: eradication; functional dyspepsia; helicobacter pylori