Commercially available activity monitors such as the fitbit charge and apple watch show poor validity in patients with gait aids after total knee arthroplasty.
Activity monitor
Apple watch
Fitbit
Step count
Total knee arthroplasty
Journal
Journal of orthopaedic surgery and research
ISSN: 1749-799X
Titre abrégé: J Orthop Surg Res
Pays: England
ID NLM: 101265112
Informations de publication
Date de publication:
15 Jul 2024
15 Jul 2024
Historique:
received:
21
03
2024
accepted:
01
07
2024
medline:
15
7
2024
pubmed:
15
7
2024
entrez:
14
7
2024
Statut:
epublish
Résumé
The aim of this study is to determine the validity of consumer grade step counter devices during the early recovery period after knee replacement surgery. Twenty-three participants wore a Fitbit Charge or Apple Watch Series 4 smart watch and performed a walking test along a 50-metre hallway. There were 9 males and 14 females included in the study with an average age of 68.5 years and BMI of 32. Each patient wore both the Fitbit Charge and Apple Watch while completing the walking test and an observer counted the ground truth value using a thumb-push tally counter. This test was repeated pre-operatively with no gait aid, immediately post operatively with a walker, at 6 weeks follow up with a cane and at 6 months with no gait aid. Bland-Altman plots were performed for all walking tests to compare the agreement between measurement techniques. Mean overall agreement of step count for pre-operative and at 6 months for subjects walking without gait aids was excellent for both the Apple Watch vs. actual and Fitbit vs. actual with bias values ranging from - 0.87 to 1.36 with limits of agreement (LOA) ranging between - 10.82 and 15.91. While using a walker both devices showed extremely little agreement with the actual step count with bias values between 22.5 and 24.37 with LOA between 11.7 and 33.3. At 6 weeks post-op while using a cane, both the Apple Watch and Fitbit devices had a range of bias values between - 2.8 and 5.73 with LOA between - 13.51 and 24.97. These devices show poor validity in the early post operative setting, especially with the use of gait aids, and therefore results should be interpreted with caution.
Identifiants
pubmed: 39004751
doi: 10.1186/s13018-024-04892-9
pii: 10.1186/s13018-024-04892-9
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
404Informations de copyright
© 2024. The Author(s).
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https://www.prnewswire.com/news-releases/zimmer-biomet-and-canary-medical-announce-fda-de-novo-classification-grant-and-authorization-to-market-the-worlds-first-and-only-smart-knee-implant-301364874.html .
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