Test-Retest and Inter-Rater Reliability of the 20-Meter Ambulation Test in Patients with Parkinson's Disease

Authors

  • Emilie Hutin Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris; UR 7377 Bioingénierie, Tissus et Neuroplasticité, Université Paris-Est Créteil Val de Marne
  • Mouna Ghédira Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris; UR 7377 Bioingénierie, Tissus et Neuroplasticité, Université Paris-Est Créteil Val de Marne
  • Valentina Mardale Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris
  • Mina Boutou Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris
  • Tharaga Santiago Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris
  • Sandrine Joudoux Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris
  • Caroline Gault-Colas Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris
  • Jean-Michel Gracies Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris; UR 7377 Bioingénierie, Tissus et Neuroplasticité, Université Paris-Est Créteil Val de Marne
  • Nicolas Bayle Laboratoire Analyse et Restauration du Mouvement, Service de Rééducation Neurolocomotrice, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris; UR 7377 Bioingénierie, Tissus et Neuroplasticité, Université Paris-Est Créteil Val de Marne

DOI:

https://doi.org/10.2340/jrm.v55.4381

Keywords:

Gait, Movement, Hypokinesia, Rehabilitation

Abstract

Objective: In patients with Parkinson’s disease, limited sit-to-stand, walk and turn contribute to decreased independence and quality of life. The 20-meter Ambulation Test (AT20) evaluates walking a total of 20 m, over a 10-m distance, back and forth between 2 chairs, starting and ending in a seated position. The aim of this study was to evaluate test-retest and inter-rater reliability of the AT20 in patients with Parkinson’s disease.
Methods: Patients with idiopathic Parkinson’s disease performed the AT20 in 3 conditions: free speed, fast speed, and with large steps, twice 1 week apart. The total number of steps and the time to complete the task were recorded manually by 4 independent raters. The main outcome criteria were the test-retest and inter-rater intraclass correlation coefficients and coefficients of variation for speed, step length and cadence in the 3 conditions.
Results: Twenty participants completed the 2 visits. Across all conditions, test-retest and inter-rater intraclass correlation coefficients for step length and speed were > 95%. Test-retest and inter-rater coefficients of variation were < 0.08.
Conclusion: The AT20 is a reliable ambulation test in Parkinson’s disease, with excellent test-retest and inter-rater reliability for step length and speed in all 3 conditions: at free speed, fast speed, and with large steps. The AT20 might be useful to assess ambulation in parkinsonism in clinical practice.

LAY ABSTRACT
In patients with Parkinson’s disease, limited sit-tostand, walk and turn contribute to decreased autonomy and quality of life. The 20-meter Ambulation Test (AT20) evaluates walking for a total of 20 m, over a 10 m distance, back and forth between 2 chairs, starting and ending in a seated position. The aim of the current study was to evaluate test-retest and inter-rater reliability for speed, step length and cadence measurement using the AT20 in subjects with Parkinson’s disease. Twenty patients with idiopathic Parkinson’s disease performed the AT20 in 3 conditions: free speed, fast speed, and with large steps, twice 1 week apart. The total number of steps and the time to complete the task were recorded manually by 4 independent raters. The AT20 is a reliable ambulation test in Parkinson’s disease, with excellent reliability between tests and between raters in all 3 conditions: free speed, fast speed, and with large steps. The AT20 might be useful in clinical practice to assess ambulation disorders in patients with parkinsonism.

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Published

2023-03-21

How to Cite

Hutin, E., Ghédira, M., Mardale, V., Boutou, M., Santiago, T., Joudoux, S., Gault-Colas, C., Gracies, J.-M., & Bayle, N. (2023). Test-Retest and Inter-Rater Reliability of the 20-Meter Ambulation Test in Patients with Parkinson’s Disease. Journal of Rehabilitation Medicine, 55, jrm00378. https://doi.org/10.2340/jrm.v55.4381

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Vol. 55 (2023)

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Original Report

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Copyright (c) 2023 Emilie Hutin, Mouna Ghédira, Valentina Mardale, Mina Boutou, Tharaga Santiago, Sandrine Joudoux, Caroline Gault-Colas, Jean-Michel Gracies, Nicolas Bayle

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