Assessing a novel way to measure three common rehabilitation outcome measures using a custom mobile phone application

Gait & Posture
Donald H LeinChristopher P Hurt

Abstract

Clinicians often use thirty-second-sit (chair)-to-stand (30CST), timed-up-and-go (TUG), and the five-times-sit-to-stand (5xSTS) since these outcome measures (OMs) are sensitive for strength, balance and mobility. The purpose of this study was to validate a custom smart phone application (App) that can remotely assess the 30CST, TUG, and 5xSTS. Thirty-one healthy adults (range: 22-55 y; 54.6-106.8 kg; 160-185 cm; 19 females) participated in this cross-sectional study. Each participant performed the 30CST, TUG, and 5xSTS at a slow and normal speed. They performed each OMs twice while the App collected their performance data using both an iOS and Android phone. The gold standard of each test was the average of the silent count of two investigators for the 30CST and the time recorded by two investigators using stopwatches for the TUG and 5xSTS. Investigators analyzed the data using Intraclass Correlation coefficients (ICC), Pearson R coefficients, Signed Rank Tests, and Wilcoxon Rank-Sum Tests. A significant correlation was observed between the performances recorded by the phones and the direct observation gold standard for all three OMs (r > 0.97). For 30CST, no significant mean count differences were found for the following compa...Continue Reading

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