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Long-term reliability of the incremental shuttle walking test in clinically stable cardiovascular disease patients

Pepera, G and McAllister, J and Sandercock, G (2010) 'Long-term reliability of the incremental shuttle walking test in clinically stable cardiovascular disease patients.' Physiotherapy, 96 (3). 222 - 227. ISSN 0031-9406

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Abstract

Objective: The incremental shuttle walking test (ISWT) is a valuable tool for assessing changes in patients functional capacity during cardiac rehabilitation. However, studies have only assessed its test-retest reliability in the short term. The purpose of this study was to examine long-term test-retest reliability of the ISWT in clinically stable cardiac patients. Design: Test-retest reliability assessment. Setting: Continuous, community-based phase IV cardiac rehabilitation centre. Participants: Thirty patients with cardiovascular disease (15 males, 15 females; age 55 to 80 years) volunteered to participate in the study. Interventions: Participants undertook two ISWTs, a minimum of 8 weeks apart. Main outcome measures: ISWT performance in metres. Results: Overall, the mean distance walked in the pre-test was 502. ± 161 m and this did not differ from test to retest. The intraclass correlation coefficient was 0.80, indicating good test-retest reliability. Using the Bland and Altman method, there was a small mean test-retest difference (7 m). The 95% limits of agreement were large, ranging from 203 m to 189 m. Conclusions: Over long test-retest durations, there appears to be no learning effect in the ISWT, negating the need for a practice walk. The long-term random variation in the ISWT test is larger than in previous studies, probably due to greater physiological and psychological variation in the participants over 8 weeks compared with that seen in day-to-day testing. Factors influencing long-term test-retest reliability of the ISWT require further elucidation. © 2010 Chartered Society of Physiotherapy.

Item Type: Article
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health > Sport, Rehabilitation and Exercise Sciences, School of
Depositing User: Jim Jamieson
Date Deposited: 07 Oct 2011 15:16
Last Modified: 30 Jan 2019 16:22
URI: http://repository.essex.ac.uk/id/eprint/945

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