title: Efficacy of probiotics in irritable bowel syndrome: a meta-analysis of randomized, controlled trials.
abstract: OBJECTIVE
  This study was designed to evaluate whether probiotics improve symptoms in patients with irritable bowel syndrome.
  
  
  METHODS
  PubMed, Embase, Scopus, Web of Science, and Cochrane Central Register of Controlled Trials were searched for studies that investigated the efficacy of probiotics in the management of irritable bowel syndrome. Clinical improvement was the key outcome of interest. Data were searched within the time period of 1966 through September 2007.
  
  
  RESULTS
  Eight randomized, placebo-controlled, clinical trials met our criteria and were included in the analysis. Pooling of eight trials for the outcome of clinical improvement yielded a significant relative risk of 1.22 (95 percent confidence interval, 1.07-1.4; P = 0.0042).
  
  
  CONCLUSIONS
  Probiotics may improve symptoms of irritable bowel syndrome and can be used as supplement to standard therapy.
authors.affiliation: Drug Selecting Committee, Food and Drug Organization, Food & Drug Laboratory Research Center, Ministry of Health & Medical Education, Tehran, Iran.
authors.forename: Shekoufeh
authors.initials: S
authors.lastname: Nikfar
authors.forename: Roja
authors.initials: R
authors.lastname: Rahimi
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Rahimi
authors.forename: Saeed
authors.initials: S
authors.lastname: Derakhshani
authors.forename: Mohammad
authors.initials: M
authors.lastname: Abdollahi
mesh_terms: D006801:Humans; D043183:Irritable Bowel Syndrome / Q000188:drug therapy*; D019936:Probiotics / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome