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Ecological Validity of Walking Capacity Tests in Multiple Sclerosis

Author

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  • J P Stellmann
  • A Neuhaus
  • N Götze
  • S Briken
  • C Lederer
  • M Schimpl
  • C Heesen
  • M Daumer

Abstract

Background: Ecological validity implicates in how far clinical assessments refer to real life. Short clinical gait tests up to ten meters and 2- or 6-Minutes Walking Tests (2MWT/6MWT) are used as performance-based outcomes in Multiple Sclerosis (MS) studies and considered as moderately associated with real life mobility. Objective: To investigate the ecological validity of 10 Meter Walking Test (10mWT), 2MWT and 6MWT. Methods: Persons with MS performed 10mWT, 6MWT including 2MWT and 7 recorded days by accelerometry. Ecological validity was assumed if walking tests represented a typical walking sequence in real-life and correlations with accelerometry parameters were strong. Results: In this cohort (n=28, medians: age=45, EDSS=3.2, disease duration=9 years), uninterrupted walking of 2 or 6 minutes occurred not frequent in real life (2.61 and 0.35 sequences/day). 10mWT correlated only with slow walking speed quantiles in real life. 2MWT and 6MWT correlated moderately with most real life walking parameters. Conclusion: Clinical gait tests over a few meters have a poor ecological validity while validity is moderate for 2MWT and 6MWT. Mobile accelerometry offers the opportunity to control and improve the ecological validity of MS mobility outcomes.

Suggested Citation

  • J P Stellmann & A Neuhaus & N Götze & S Briken & C Lederer & M Schimpl & C Heesen & M Daumer, 2015. "Ecological Validity of Walking Capacity Tests in Multiple Sclerosis," PLOS ONE, Public Library of Science, vol. 10(4), pages 1-11, April.
    • Handle: RePEc:plo:pone00:0123822
    DOI: 10.1371/journal.pone.0123822
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    References listed on IDEAS

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    1. Michaela Schimpl & Christian Lederer & Martin Daumer, 2011. "Development and Validation of a New Method to Measure Walking Speed in Free-Living Environments Using the Actibelt® Platform," PLOS ONE, Public Library of Science, vol. 6(8), pages 1-12, August.
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    Cited by:

    1. Viktoria Karle & Verena Hartung & Keti Ivanovska & Mathias Mäurer & Peter Flachenecker & Klaus Pfeifer & Alexander Tallner, 2020. "The Two-Minute Walk Test in Persons with Multiple Sclerosis: Correlations of Cadence with Free-Living Walking Do Not Support Ecological Validity," IJERPH, MDPI, vol. 17(23), pages 1-11, December.
    2. Juan Antonio Párraga-Montilla & Diana Patricia Pozuelo-Carrascosa & Juan Manuel Carmona-Torres & José Alberto Laredo-Aguilera & Ana Isabel Cobo-Cuenca & Pedro Ángel Latorre-Román, 2021. "Gait Performance as an Indicator of Cognitive Deficit in Older People," IJERPH, MDPI, vol. 18(7), pages 1-13, March.
    3. Jan Szczegielniak & Krzysztof J Latawiec & Jacek Łuniewski & Rafał Stanisławski & Katarzyna Bogacz & Marcin Krajczy & Marek Rydel, 2018. "A study on nonlinear estimation of submaximal effort tolerance based on the generalized MET concept and the 6MWT in pulmonary rehabilitation," PLOS ONE, Public Library of Science, vol. 13(2), pages 1-18, February.

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