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lüll Hallway versus treadmill 6-minute-walk tests in patients with chronic obstructive pulmonary disease de Almeida FG; Victor EG; Rizzo JARespir Care 2009[Dec]; 54 (12): 1712-6INTRODUCTION: The 6-min-walk test is widely used for functional evaluation of patients with chronic obstructive pulmonary disease (COPD), but the test requires a 30-m unobstructed hallway, which is not available in all institutions. A treadmill 6-min walk test might be more practical. METHODS: In a crossover study, we compared the results from hallway and treadmill 6-min-walk tests by 19 patients with moderate to very severe COPD. Each patient did 3 hallway tests and 3 treadmill tests. The hallway tests were according to the American Thoracic Society guidelines. RESULTS: The mean hallway walk distance was significantly (102 m, 95% confidence interval 65-139 m) greater than the mean treadmill walk distance. Between the hallway and treadmill tests, agreement was very poor via Bland-Altman analysis, correlation was low (r = 0.48, P = .04), and those differences were not explained by differences in patient effort. The differences between the 3 treadmill tests were greater than those between the 3 hallway tests, and in both the hallway and treadmill tests patient effort progressively diminished, indicating a learning effect. CONCLUSIONS: The hallway and treadmill walk tests are not interchangeable. We need further study and standardization of the treadmill 6-min walk test.|Aged[MESH]|Aged, 80 and over[MESH]|Cross-Over Studies[MESH]|Exercise Test/*methods[MESH]|Female[MESH]|Humans[MESH]|Male[MESH]|Middle Aged[MESH]|Pulmonary Disease, Chronic Obstructive/*rehabilitation[MESH] |