title: Efficacy of antidepressants and psychological therapies in irritable bowel syndrome: systematic review and meta-analysis.
abstract: OBJECTIVE
  Irritable bowel syndrome (IBS) is a chronic functional gastrointestinal disorder. Evidence for treatment of the condition with antidepressants and psychological therapies is conflicting.
  
  
  METHODS
  Systematic review and meta-analysis of randomised controlled trials (RCTs). MEDLINE, EMBASE and the Cochrane Controlled Trials Register were searched (up to May 2008).
  
  
  METHODS
  RCTs based in primary, secondary and tertiary care.
  
  
  METHODS
  Adults with IBS.
  
  
  METHODS
  Antidepressants versus placebo, and psychological therapies versus control therapy or "usual management".
  
  
  METHODS
  Dichotomous symptom data were pooled to obtain a relative risk (RR) of remaining symptomatic after therapy, with a 95% confidence interval (CI). The number needed to treat (NNT) was calculated from the reciprocal of the risk difference.
  
  
  RESULTS
  The search strategy identified 571 citations. Thirty-two RCTs were eligible for inclusion: 19 compared psychological therapies with control therapy or "usual management", 12 compared antidepressants with placebo, and one compared both psychological therapy and antidepressants with placebo. Study quality was generally good for antidepressant but poor for psychological therapy trials. The RR of IBS symptoms persisting with antidepressants versus placebo was 0.66 (95% CI, 0.57 to 0.78), with similar treatment effects for both tricyclic antidepressants and selective serotonin reuptake inhibitors. The RR of symptoms persisting with psychological therapies was 0.67 (95% CI, 0.57 to 0.79). The NNT was 4 for both interventions.
  
  
  CONCLUSIONS
  Antidepressants are effective in the treatment of IBS. There is less high-quality evidence for routine use of psychological therapies in IBS, but available data suggest these may be of comparable efficacy.
authors.affiliation: Gastroenterology Division, McMaster University Medical Centre, 1200 Main Street West, Hamilton, Ontario, L8N 3Z5, Canada. alexf12399@yahoo.com
authors.forename: A C
authors.initials: AC
authors.lastname: Ford
authors.forename: N J
authors.initials: NJ
authors.lastname: Talley
authors.forename: P S
authors.initials: PS
authors.lastname: Schoenfeld
authors.forename: E M M
authors.initials: EM
authors.lastname: Quigley
authors.forename: P
authors.initials: P
authors.lastname: Moayyedi
mesh_terms: D000328:Adult; D000928:Antidepressive Agents / Q000627:therapeutic use*; D015928:Cognitive Behavioral Therapy / Q000379:methods*; D003131:Combined Modality Therapy / Q000379:methods; D005260:Female; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000188:drug therapy / Q000523:psychology / Q000628:therapy*; D008297:Male; D010919:Placebos / Q000627:therapeutic use; D017410:Practice Guidelines as Topic; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome
chemical_list: D000928:Antidepressive Agents; D010919:Placebos