title: Validity and reliability of the modified shuttle walk test in patients with chronic obstructive pulmonary disease.
abstract: OBJECTIVE
  (1) To examine the concurrent criterion validity of the modified shuttle walk test (MSWT) by using the 6- (6MWT) and 12-minute walk test (12MWT), (2) to examine the concurrent criterion validity of the estimated maximum oxygen uptake (Vo2max) of the MSWT with actual Vo2max, and (3) to determine test-retest reliability of the MSWT in patients with chronic obstructive pulmonary disease (COPD).
  
  
  METHODS
  Validation study.
  
  
  METHODS
  Outpatient pulmonary rehabilitation program.
  
  
  METHODS
  Thirty clinically stable adults with COPD.
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  Subjects were randomly assigned to receive either the 6MWT and 12MWT or the MSWT first. The MSWT was repeated 1 week later (N = 30). Estimated Vo2max was calculated, and actual Vo2max was conducted by using the Jones test. Validity of the MSWT was assessed by comparing endurance scores and Vo2max with results from the 6MWT and 12MWT and Jones test, respectively.
  
  
  RESULTS
  There was a moderately high correlation between the MSWT and the 6MWT and 12MWT at initial testing (.82 and .74, respectively). Correlation between estimated and actual Vo2max was r equal to .68. Test-retest reliability for the entire sample was high (intraclass correlation coefficient, .88). Results remained quite stable across severity, age, and sex subgroups.
  
  
  CONCLUSIONS
  The MSWT is a standardized externally paced submaximal endurance walking test. The results indicate that the MSWT has high concurrent validity and test-retest reliability for patients with COPD.
authors.affiliation: Centre de Recherche Interdisciplinaire en Réadaptation du Montréal Métropolitain, Jewish Rehabilitation Hospital, Laval, QC, Canada.
authors.forename: Loredana A
authors.initials: LA
authors.lastname: Campo
authors.forename: Gevorg
authors.initials: G
authors.lastname: Chilingaryan
authors.forename: Katherine
authors.initials: K
authors.lastname: Berg
authors.forename: Bruno
authors.initials: B
authors.lastname: Paradis
authors.forename: Barbara
authors.initials: B
authors.lastname: Mazer
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005080:Exercise Test / Q000379:methods*; D005260:Female; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology* / Q000534:rehabilitation; D015203:Reproducibility of Results; D016138:Walking / Q000502:physiology*