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dc.contributor.authorMcKeough, Zoe
dc.contributor.authorLeung, Regina
dc.contributor.authorNeo, Ji Hui
dc.contributor.authorJenkins, Sue
dc.contributor.authorHolland, Anne
dc.contributor.authorHill, Kylie
dc.contributor.authorMorris, Norman
dc.contributor.authorSpencer, Lissa
dc.contributor.authorHill, Catherine
dc.contributor.authorLee, Annemarie
dc.contributor.authorSeale, Helen
dc.contributor.authorCecins, Nola
dc.contributor.authorMcDonald, Christine
dc.contributor.authorAlison, Jennifer
dc.date.accessioned2019-06-08T01:40:47Z
dc.date.available2019-06-08T01:40:47Z
dc.date.issued2018
dc.identifier.issn1479-9723
dc.identifier.doi10.1177/1479972317729051
dc.identifier.urihttp://hdl.handle.net/10072/376063
dc.description.abstractExercise-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.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherElsevier
dc.publisher.placeUnited Kingdom
dc.relation.ispartofpagefrom131
dc.relation.ispartofpageto137
dc.relation.ispartofissue2
dc.relation.ispartofjournalChronic Respiratory Disease
dc.relation.ispartofvolume15
dc.subject.fieldofresearchCardiorespiratory Medicine and Haematology not elsewhere classified
dc.subject.fieldofresearchCardiorespiratory Medicine and Haematology
dc.subject.fieldofresearchClinical Sciences
dc.subject.fieldofresearchcode110299
dc.subject.fieldofresearchcode1102
dc.subject.fieldofresearchcode1103
dc.titleShuttle walk tests in people with COPD who demonstrate exercise-induced oxygen desaturation: An analysis of test repeatability and cardiorespiratory responses
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://www.creativecommons.org/licenses/by-nc/4.0/
dc.description.versionPublished
gro.rights.copyright© The Author(s) 2017 This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
gro.hasfulltextFull Text
gro.griffith.authorMorris, Norman


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