Reproducibility of the 6-minute walk test in lung transplant

Wien. Klin. Wochenschr. · Oct 2023

Reproducibility of the 6-minute walk test in lung transplant recipients.

There is reason to believe that the favorable measurement properties of the 6‑minute walk test (6MWT) reported for retest reliability and its capability to detect a true change in healthy individuals or persons with chronic respiratory disease may not apply to lung transplant recipients (LuTXr). We therefore investigated retest reliability of the 6MWT and, in addition, made an attempt to explore whether the 6MWT was sensitive enough to detect important changes that occur with postacute rehabilitation in LuTXr after first time LuTX. ⋯ The 6MWT overall represents a reliable functional performance tool in LuTXr that is sensitive to detect changes in physical performance as a result of medical postacute rehabilitation.

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- Gerold R Ebenbichler, Gabriella Murakoezy, Julia Kohlmann, Richard Habenicht, Thomas Kienbacher, Peter Jaksch, Patrick Mair, and Konrad Hoetzenecker.
- Department of Physical Medicine, Rehabilitation & Occupational Medicine, Medical University of Vienna, General Hospital of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria. Gerold.ebenbichler@meduniwien.ac.at.
- Wien. Klin. Wochenschr. 2023 Oct 1; 135 (19-20): 517527517-527.
PurposeThere is reason to believe that the favorable measurement properties of the 6‑minute walk test (6MWT) reported for retest reliability and its capability to detect a true change in healthy individuals or persons with chronic respiratory disease may not apply to lung transplant recipients (LuTXr). We therefore investigated retest reliability of the 6MWT and, in addition, made an attempt to explore whether the 6MWT was sensitive enough to detect important changes that occur with postacute rehabilitation in LuTXr after first time LuTX.MethodsImmediately before postacute rehabilitation, 50 LuTXr completed 6MWT testing twice, separated by 1-2 workdays (retest reliability), and were reassessed after completion of rehabilitation 2 months later (sensitivity to changes). Body function measures and health-related quality of life (HRQoL) assessments were collected at baseline.ResultsBaseline retest 6‑minute walk distance (6MWD) and the age-related predicted walking distance (6MWD%pred) scores significantly increased before postacute rehabilitation. The intraclass coefficient of correlation ICC of the 6MWD was 0.93 (95% confidence interval, CI: 0.88-0.96) and its smallest real difference (SRD) 79 m (95% CI: 52;107). Receiver operating curve analyses revealed the rehabilitation associated changes in 6MWD/6MWD%pred to exceed the SRD/SRD% values in a highly accurate way.ConclusionThe 6MWT overall represents a reliable functional performance tool in LuTXr that is sensitive to detect changes in physical performance as a result of medical postacute rehabilitation.© 2022. The Author(s).

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Reproducibility of the 6-minute walk test in lung transplant recipients.

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