Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/21041
Title: Shuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses.
Authors: McKeough, Zoe;Leung, Regina;Neo, Ji Hui;Jenkins, Sue;Holland, Anne E;Hill, Kylie;Morris, Norman;Spencer, Lissa;Hill, Catherine J;Lee, Annemarie l;Seale, Helen;Cecins, Nola;McDonald, Christine f;Alison, Jennifer
Affiliation: 10 Allied Health Professorial Unit, Sydney Local Health District, Camperdown, New South Wales, Australia
13 Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
1 Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney, Lidcombe, New South Wales, Australia
2 Department of Physiotherapy, Sir Charles Gairdner Hospital, Hospital Ave, Nedlands, Western Australia, Australia
3 School of Physiotherapy and Exercise Science, Faculty of Health Sciences, Curtin University, Perth, Western Australia, Australia
4 Institute for Respiratory Health, Hospital Ave, Nedlands, Western Australia, Australia
5 Discipline of Physiotherapy, School of Allied Health, LaTrobe University, Melbourne, Victoria, Australia
6 Department of Physiotherapy, Alfred Health, Melbourne, Victoria, Australia
Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
8 School of Allied Health Sciences and Menzies Health Institute, Griffith University, Nathan, Queensland, Australia
9 Allied Health Research Collaborative, The Prince Charles Hospital, Chermside, Queensland, Australia
Department of Physiotherapy, Austin Health, Heidelberg, Victoria, Australia
Department of Respiratory and Sleep Medicine, Austin Health, Heidelberg, Victoria, Australia
Issue Date: 2018
EDate: 2017
Citation: Chronic respiratory disease 2018; 15(2): 131-137
Abstract: 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 SpO2 was <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 SpO2 and 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.
URI: http://ahro.austin.org.au/austinjspui/handle/1/21041
DOI: 10.1177/1479972317729051
ORCID: 0000-0001-6481-3391
0000-0003-2061-845X
PubMed URL: 28851233
Type: Journal Article
Research Support, Non-U.S. Gov't
Subjects: Chronic obstructive pulmonary disease
exercise induced
exercise test
oxygen desaturation
repeatability
Appears in Collections:Journal articles

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