Reliability of the walking energy cost test and the six-minute walk test in boys with Duchenne muscular dystrophy |
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| Affiliation: | 1. Cancer Center, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China;2. Department of Pain Management, Wuhan Pu''ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430034, PR China;3. Department of Anesthesiology and Pain Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China;4. Department of Anaesthesiology, The University of Hong Kong, Queen Mary Hospital, Hong Kong, PR China;1. Institute of Myology, Pitié-Salpêtrière Hospital, Paris, France;2. Centre de Référence de Pathologie Neuromusculaire Paris-Est, Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Paris, France;3. Université Laval, Québec, Canada;4. Centre Interdisciplinaire de Recherche en Réadaptation et Intégration Sociale, Québec, Canada;5. Department of Pathology, Henri Mondor University Hospital, Créteil, France |
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| Abstract: | The walking energy cost test (WECT) is a useful tool when measuring ambulatory function in children with motor disorders. However, data on the reliability of this test in Duchenne muscular dystrophy (DMD) is not available. In this study we established the reliability of the WECT and the commonly used six-minute walk test (6MWT) in 19 boys with DMD, aged 6–12 years. Participants performed the WECT and 6MWT twice within three weeks. Reliability was determined for walking distance (D, m) and gross energy cost (EC, J kg−1 m−1), using the intraclass correlation coefficient (ICC2,1) and smallest detectable change (SDC).Reliability for walking distance was good, with an ICC of 0.92 [95% CI: 0.81–0.97] and 0.83 [CI: 0.53–0.94] for the 6MWT and WECT, respectively, and an ICC of 0.85 [CI: 0.64–0.94] for gross EC. SDCs were 12.2% for D6MWT, 12.7% for DWECT and 18.5% for gross EC. In conclusion, in young boys with DMD, the reliability of both the WECT and 6MWT for assessing walking distance is adequate. Gross EC, as assessed with the WECT is also reliable and sufficiently sensitive to detect change in walking strain following interventions at group level. |
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| Keywords: | Duchenne muscular dystrophy Walking ability Reliability Energy cost of walking test Six minute walking test |
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