title: A comparison of twice- versus once-weekly supervision during pulmonary rehabilitation in chronic obstructive pulmonary disease.
abstract: OBJECTIVE
  To compare the effects of twice- versus once-weekly supervised pulmonary rehabilitation on exercise capacity and quality of life in patients with chronic obstructive pulmonary disease (COPD).
  
  
  METHODS
  Prospective, randomized, parallel-group study.
  
  
  METHODS
  Hospital outpatient physiotherapy department.
  
  
  METHODS
  Patients with COPD.
  
  
  METHODS
  Group 1 (n=46) received 1 supervised exercise session a week and 2 unsupervised sessions; group 2 (n= 45) received 2 supervised exercise sessions a week and 1 unsupervised session for 6 weeks. Patients were assessed at baseline and at 6 weeks, 2 months, and 6 months.
  
  
  METHODS
  Incremental (ISWT) and endurance (ESWT) shuttle walk tests and Chronic Respiratory Disease Questionnaire (CRDQ).
  
  
  RESULTS
  Sixty-six of 91 patients (group 1, n=34; group 2, n=32) completed the 6-week program. There was no significant difference in key outcome measures between the 2 groups (ISWT, 13.50m; 95% confidence interval [CI], -10.06 to 37.15m; ESWT, 72.64s; 95% CI, -96.01 to 241.29s; CRDQ total score, 2.54; 95% CI, -3.16 to 8.24). The results of the ESWTs suggest there may be an interaction between baseline exercise capacity and benefit of pulmonary rehabilitation, with more disabled patients achieving greater benefit if they are supervised twice weekly. Irrespective of group, allocation benefits after pulmonary rehabilitation had almost dissipated by 6 months.
  
  
  CONCLUSIONS
  There was no difference in the effectiveness of twice- versus once-weekly supervised pulmonary rehabilitation. This study highlights the need for development of strategies that will maintain the improvement achieved by the initial pulmonary rehabilitation program.
authors.affiliation: Health and Rehabilitation Sciences Research Institute, University of Ulster, Newtownabbey, Northern Ireland. b.oneill@ulster.ac.uk
authors.forename: Brenda
authors.initials: B
authors.lastname: O'Neill
authors.forename: Annemarie
authors.initials: A
authors.lastname: McKevitt
authors.forename: Sara
authors.initials: S
authors.lastname: Rafferty
authors.forename: Judy M
authors.initials: JM
authors.lastname: Bradley
authors.forename: Doreen
authors.initials: D
authors.lastname: Johnston
authors.forename: Ian
authors.initials: I
authors.lastname: Bradbury
authors.forename: Joseph
authors.initials: J
authors.lastname: McMahon
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D005081:Exercise Therapy / Q000379:methods*; D017079:Exercise Tolerance; D005260:Female; D006801:Humans; D008297:Male; D010807:Physical Endurance; D011446:Prospective Studies; D029424:Pulmonary Disease, Chronic Obstructive / Q000534:rehabilitation*; D011795:Surveys and Questionnaires; D016896:Treatment Outcome