Validity and reliability of the modified shuttle walk test in patients with chronic obstructive pulmonary disease.
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.
Campo
Loredana A
LA
Centre de Recherche Interdisciplinaire en Réadaptation du Montréal Métropolitain, Jewish Rehabilitation Hospital, Laval, QC, Canada.
Chilingaryan
Gevorg
G
Berg
Katherine
K
Paradis
Bruno
B
Mazer
Barbara
B
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*