title: How relevant are exercise capacity measures for evaluating treatment effects in chronic fatigue syndrome? Results from a prospective, multidisciplinary outcome study.
abstract: OBJECTIVE
  To evaluate the outcome of a multidisciplinary treatment programme for patients with chronic fatigue syndrome, including health-related quality of life (HRQoL) and psychosocial variables, and exercise capacity measures.
  
  
  METHODS
  A six-month prospective outcome study.
  
  
  METHODS
  University outpatient rehabilitation clinic; group setting.
  
  
  METHODS
  One hundred and sixteen women fulfilling chronic fatigue syndrome criteria.
  
  
  METHODS
  Cognitive behaviourally and graded exercise-based strategies; emphasis on adaptive lifestyle changes.
  
  
  METHODS
  Short Form General Health Survey (SF-36); Symptom Checklist (SCL-90); Causal Attribution List (CAL); Self-Efficacy Scale (SE); maximum progressive bicycle ergometer test with respiratory gas analysis; and isokinetic leg strength test, before and after treatment.
  
  
  RESULTS
  The total group significantly improved on nearly all reported HRQoL/psychosocial variables. Changes in exercise capacity measures were rather modest and did not correlate or only weakly correlated with HRQoL/psychosocial variables. Subgroup analyses indicated that less fit patients improved significantly more on exercise capacity measures than their more fit counterparts. Patients who were fitter at baseline scored better on pretreatment HRQoL/psychosocial variables, but both subgroups improved similarly on these variables.
  
  
  CONCLUSIONS
  Health-related quality of life and psychosocial functioning in patients with chronic fatigue syndrome improves after a six-month cognitive behaviourally and graded exercise-based multidisciplinary treatment programme. Increase in exercise capacity measures is not a necessary condition for reported improvements, except for less fit patients.
authors.affiliation: Chronic Fatigue Reference Centre, University Hospitals and Department of Rehabilitation Sciences, KU Leuven, Belgium.
authors.forename: K
authors.initials: K
authors.lastname: Pardaens
authors.forename: L
authors.initials: L
authors.lastname: Haagdorens
authors.forename: P
authors.initials: P
authors.lastname: Van Wambeke
authors.forename: A
authors.initials: A
authors.lastname: Van den Broeck
authors.forename: B
authors.initials: B
authors.lastname: Van Houdenhove
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D015928:Cognitive Behavioral Therapy; D015444:Exercise; D005080:Exercise Test; D017079:Exercise Tolerance; D015673:Fatigue Syndrome, Chronic / Q000523:psychology / Q000534:rehabilitation*; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D011446:Prospective Studies; D011788:Quality of Life; D016896:Treatment Outcome