Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses
© 2017, © The Author(s) 2017. Exercise-induced oxygen desaturation (EID) is prevalent in people with chronic obstructive pulmonary disease (COPD). This article reports a sub-analysis from a randomized controlled trial (RCT) in people with COPD and EID (COPD/EID). The primary aim, in people with COPD...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Sage Publications Ltd.
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/68797 |
| _version_ | 1848761892333420544 |
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| author | McKeough, Z. Leung, R. Neo, J. Jenkins, Susan Holland, A. Hill, Kylie Morris, N. Spencer, L. Hill, C. Lee, A. Seale, H. Cecins, N. McDonald, C. Alison, J. |
| author_facet | McKeough, Z. Leung, R. Neo, J. Jenkins, Susan Holland, A. Hill, Kylie Morris, N. Spencer, L. Hill, C. Lee, A. Seale, H. Cecins, N. McDonald, C. Alison, J. |
| author_sort | McKeough, Z. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017, © The Author(s) 2017. Exercise-induced oxygen desaturation (EID) is prevalent in people with chronic obstructive pulmonary disease (COPD). This article reports a sub-analysis from a randomized controlled trial (RCT) in people with COPD and EID (COPD/EID). The primary aim, in people with COPD/ EID, was to determine the repeatability of the distance and time walked in the incremental shuttle walk test (ISWT) and endurance shuttle walk test (ESWT), respectively. A secondary aim was to determine whether any participant characteristics predicted those who did not demonstrate improvements on a repeat ISWT or ESWT. Participants with nadir oxygen saturation (SpO2) < 90% on the 6-minute walk test were recruited to the RCT. Two ISWTs and two ESWTs were then performed as part of the baseline assessments, and participants were included in this sub-analysis if their nadir SpO2was <90% during the better of two ISWTs. Repeatability of the tests was analysed using Bland–Altman plots and paired t-tests. Participant characteristics of age, lung function, level of nadir SpO2and end-test dyspnoea were used to predict those who were not likely to demonstrate improvements on a repeat test using receiver operating curves. Eighty-seven participants (mean age (standard deviation, SD) 70 (7) years; forced expiratory volume in one second (FEV1) 47 (17)% predicted) were included. The mean differences (coefficient of repeatability) for the ISWTs and ESWTs were 9 m (55 m) and 19 seconds (142 seconds) respectively (p < 0.05). No participant characteristic predicted the absence of improvement on the second ISWT (area under the curve (AUC) ranged from 0.49 to 0.58, all p > 0.2) or the second ESWT (AUC ranged from 0.43 to 0.52, all p > 0.3). Although repeating the tests showed only small improvements in distance (ISWT) and time (ESWT) walked in people with COPD/EID, the variability was large making definite conclusions about test repeatability in these individuals difficult. |
| first_indexed | 2025-11-14T10:38:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-68797 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:38:53Z |
| publishDate | 2018 |
| publisher | Sage Publications Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-687972018-07-31T07:08:39Z Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses McKeough, Z. Leung, R. Neo, J. Jenkins, Susan Holland, A. Hill, Kylie Morris, N. Spencer, L. Hill, C. Lee, A. Seale, H. Cecins, N. McDonald, C. Alison, J. © 2017, © The Author(s) 2017. Exercise-induced oxygen desaturation (EID) is prevalent in people with chronic obstructive pulmonary disease (COPD). This article reports a sub-analysis from a randomized controlled trial (RCT) in people with COPD and EID (COPD/EID). The primary aim, in people with COPD/ EID, was to determine the repeatability of the distance and time walked in the incremental shuttle walk test (ISWT) and endurance shuttle walk test (ESWT), respectively. A secondary aim was to determine whether any participant characteristics predicted those who did not demonstrate improvements on a repeat ISWT or ESWT. Participants with nadir oxygen saturation (SpO2) < 90% on the 6-minute walk test were recruited to the RCT. Two ISWTs and two ESWTs were then performed as part of the baseline assessments, and participants were included in this sub-analysis if their nadir SpO2was <90% during the better of two ISWTs. Repeatability of the tests was analysed using Bland–Altman plots and paired t-tests. Participant characteristics of age, lung function, level of nadir SpO2and end-test dyspnoea were used to predict those who were not likely to demonstrate improvements on a repeat test using receiver operating curves. Eighty-seven participants (mean age (standard deviation, SD) 70 (7) years; forced expiratory volume in one second (FEV1) 47 (17)% predicted) were included. The mean differences (coefficient of repeatability) for the ISWTs and ESWTs were 9 m (55 m) and 19 seconds (142 seconds) respectively (p < 0.05). No participant characteristic predicted the absence of improvement on the second ISWT (area under the curve (AUC) ranged from 0.49 to 0.58, all p > 0.2) or the second ESWT (AUC ranged from 0.43 to 0.52, all p > 0.3). Although repeating the tests showed only small improvements in distance (ISWT) and time (ESWT) walked in people with COPD/EID, the variability was large making definite conclusions about test repeatability in these individuals difficult. 2018 Journal Article http://hdl.handle.net/20.500.11937/68797 10.1177/1479972317729051 http://creativecommons.org/licenses/by-nc/4.0/ Sage Publications Ltd. fulltext |
| spellingShingle | McKeough, Z. Leung, R. Neo, J. Jenkins, Susan Holland, A. Hill, Kylie Morris, N. Spencer, L. Hill, C. Lee, A. Seale, H. Cecins, N. McDonald, C. Alison, J. Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title | Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title_full | Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title_fullStr | Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title_full_unstemmed | Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title_short | Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses |
| title_sort | shuttle walk tests in people with copd who demonstrate exercise-induced oxygen desaturation: an analysis of test repeatability and cardiorespiratory responses |
| url | http://hdl.handle.net/20.500.11937/68797 |