Walking Speeds in Patients With Chronic Obstructive Pulmonary Disease

Study Overview
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Brief Summary
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A growing body of evidence suggests that in individuals with chronic lung disease their walk speed is related to their daily function and quality of life. It is possible to assess their usual (routine) and fast walking speeds by getting them to walk in a flat hallway. In individuals with chronic lung disease, we anticipate that their usual walk speed will be helpful in exercise prescription and use in multidimensional scoring systems. However, it is important to first determine the measurement properties of these two walk speeds.

Official Title
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Repeatability and Utility of the Usual and Fast Walking Speeds in Patients With Chronic Obstructive Pulmonary Disease (COPD)

Conditions
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Chronic Obstructive Pulmonary Disease

Intervention / Treatment
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* Behavioral: Usual and Fast Walking Speeds


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Clinical and spirometric diagnosis of COPD Able to provide written informed consent Exclusion Criteria: Unstable cardiovascular disease Acute respiratory exacerbation within 4 weeks Neurologic or orthopedic limitation to walking Inability to comprehend instructions in English

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| COPD patients<br>Usual and Fast Walking Speeds | Behavioral: Usual and Fast Walking Speeds<br>* Stable patients with chronic obstructive pulmonary disease will demonstrate their usual and fast walking speeds over a 30 m course, with speed calculated over the middle 10 m using optical sensors. The test will be repeated after a 5 minute rest; this procedure will then be repeated on two subsequent days, at the same time of day, within one week.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Coefficient of repeatability for usual and fast walk speeds | Participants will be asked to demonstrate their usual and fast walk speeds over the middle 10 meters of a 30 meter straight track using optical sensors and a hand-held stopwatch. Participants will be instructed to walk at their 'usual' and 'fast' speeds as standardized instructions. The walk test will be repeated after a 5 minute rest and then repeated on two subsequent days, at the same time of day, within one week. This will be simply observational in nature with no planned intervention aside for controlling walking environment. The primary outcome is going to report a change in walk speeds from baseline and at 1 and 2 days using repeated measures as described by Bland and Altman (reference below). | At baseline and over 1 week period. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Agreement in walk speeds between optical sensors and stopwatch | Assess agreement between the use of optical sensors and stop watch time for the usual and fast walk speeds. | Baseline and over 1 week of testing. | 
| Agreement in the Bode Index using six minute walk distance and usual walk speed. | To assess agreement in the calculated Bode Index using the six minute walk distance versus estimated usual walk speed distance over 6 minutes. | Baseline | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Exercise testing, Functional status, Pulmonary rehabilitation