title: Indacaterol on dyspnea in chronic obstructive pulmonary disease: a systematic review and meta-analysis of randomized placebo-controlled trials.
abstract: BACKGROUND
  Indacaterol is a novel, once-daily (od), inhaled, long-acting β(2)-agonist bronchodilator for maintenance treatment of airflow limitation in patients with COPD. The aim of this study was to evaluate the efficacy of indacaterol on dyspnea, using available randomized placebo-controlled trials.
  
  
  METHODS
  A systematic search was made of MEDLINE, EMBASE, the Cochrane trials databases, and a manual search of journals. Randomized placebo-controlled trials of 12 weeks or more comparing indacaterol with placebo were reviewed, and eligible studies were included in a meta-analysis. The odds ratio (OR) for likelihood of achieving TDI score ≥ 1 after 12 weeks of treatment was used as an outcome measure to compare indacaterol to placebo.
  
  
  RESULTS
  Six trials were included in the analysis. Relative to placebo, the overall ORs for response were: indacaterol 75 μg od 1.784 (95% CI 1.282 to 2.482); indacaterol 150 μg od 2.149 (95% CI 1.746 to 2.645); and indacaterol 300 μg od 2.458 (95% CI 2.010 to 3.006). Overall OR for response in TDI tended to increase with higher indacaterol doses.
  
  
  CONCLUSIONS
  Patients receiving indacaterol had clinically significant improvements in symptoms of dyspnea compared to placebo. Incremental benefits in TDI were observed with increasing doses. Indacaterol may provide patients and physicians with a useful treatment option in symptomatic patients with dyspnea.
authors.affiliation: Department of Pneumology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China. Janet_Han2000@hotmail.com
authors.forename: Jiangna
authors.initials: J
authors.lastname: Han
authors.forename: Lu
authors.initials: L
authors.lastname: Dai
authors.forename: Nanshan
authors.initials: N
authors.lastname: Zhong
mesh_terms: D058666:Adrenergic beta-2 Receptor Agonists / Q000627:therapeutic use; D004417:Dyspnea / Q000188:drug therapy* / Q000401:mortality*; D006801:Humans; D007189:Indans / Q000627:therapeutic use*; D010919:Placebos; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000401:mortality*; D015363:Quinolones / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic
chemical_list: D058666:Adrenergic beta-2 Receptor Agonists; D007189:Indans; D010919:Placebos; D015363:Quinolones; C510790:indacaterol