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The 2 min step test: A reliable and valid measure of functional capacity in older adults post coronary revascularisation

Chow, Jaclyn Jie Ling; Fitzgerald, Claire; Rand, Sarah; (2023) The 2 min step test: A reliable and valid measure of functional capacity in older adults post coronary revascularisation. Physiotherapy Research International , 28 (2) , Article e1984. 10.1002/pri.1984. Green open access

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Abstract

PURPOSE: Exercise training is the central component in Cardiac Rehabilitation (CR). A baseline assessment of aerobic capacity is paramount for exercise prescription and safety. The Two-Minute Step Test (2MST) has been used to measure aerobic capacity in healthy older adults. However, the reliability and validity of the 2MST in older adults post-coronary revascularisation (CRV) is unknown. METHODS: A prospective observational study was conducted in a single CR centre. Two 2MSTs and one six-minute walk test (6MWT) were completed in a single session. The 2MST measurements were recorded by two raters for each individual. The six-minute walk distance (6MWD) and 2MST steps recorded by both raters were analysed to determine the relationship and agreement between measurements. RESULTS: Thirty one participants with a median (IQR) age of 66 (62,73) years old were included in the study post CRV. Strong positive correlations were found between steps achieved during the 2MSTs and the 6MWD (r = 0.87, 95% CI 0.82-0.91, p < 0.0001). Excellent inter-rater reliability was demonstrated between raters during the 2MSTs (ICC = 0.999-1.000, p = 0.000). Excellent relative test-retest reliability was demonstrated in both 2MSTs recorded by both raters (ICC = 0.927-0.934, p = 0.000). However, absolute test-retest reliability may have been limited by a learning effect between repeated 2MSTs. CONCLUSIONS: The results of this study indicate that the 2MST may be used as an alternative to the 6MWT as an outcome measure for aerobic capacity in older adults post-CRV. However, a practice trial is recommended at baseline to account for a learning effect.

Type: Article
Title: The 2 min step test: A reliable and valid measure of functional capacity in older adults post coronary revascularisation
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/pri.1984
Publisher version: https://doi.org/10.1002/pri.1984
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: cardio thoracic surgery, exercise, physiotherapy
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health > Infection, Immunity and Inflammation Dept
URI: https://discovery.ucl.ac.uk/id/eprint/10167159
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