A Smartphone-Based Timed Up and Go Test Self-Assessment for Older Adults: Validity and Reliability Study.

IF 5 Q1 GERIATRICS & GERONTOLOGY
JMIR Aging Pub Date : 2025-03-21 DOI:10.2196/67322
Melissa Johanna Böttinger, Sabato Mellone, Jochen Klenk, Carl-Philipp Jansen, Marios Stefanakis, Elena Litz, Anastasia Bredenbrock, Jan-Philipp Fischer, Jürgen M Bauer, Clemens Becker, Katharina Gordt-Oesterwind
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引用次数: 0

Abstract

Background: The Timed Up and Go test (TUG) is recommended as an evidence-based tool for measuring physical capacity. Instrumented TUG (iTUG) approaches expand classical supervised clinical applications offering the potential of self-assessment for older adults.

Objective: This study aimed to evaluate the concurrent validity and test-retest reliability of a smartphone-based TUG self-assessment "up&go app."

Methods: A total of 52 community-dwelling older adults (>67 years old) were recruited. A validated and medically certified system attached with a belt at the lower back was used as a reference system to validate the "up&go app" algorithm. The participants repeated the TUG 5 times wearing, a smartphone with the "up&go app" in their front trouser pocket and an inertial sensor to test the concurrent validity. A subsample of 37 participants repeated the "up&go app" measurement 2 weeks later to examine the test-retest reliability.

Results: The correlation between the "up&go app" and the reference measurement was r=0.99 for the total test duration and r=0.97 for the 5 single repetitions. Agreement between the 5 repetitions was intraclass correlation coefficient (ICC)=0.9 (0.84-0.94). Leaving out the first repetition, the agreement was ICC=0.95 (0.92-0.97). Test-retest agreement had an ICC=0.79 (0.53-0.9).

Conclusions: The duration of 5 repetitions of the TUG test, measured with the pocket-worn "up&go app," was very consistent with the results of a lower-back sensor system, indicating excellent concurrent validity. Participants walked slower in the first round than in the other 4 repetitions within a test run. Test-retest reliability was also excellent. The "up&go app" provides a useful smartphone-based approach to measure 5 repetitions of the TUG. The app could be used by older adults as a self-screening and monitoring tool of physical capacity at home and thereby help to early identify functional limitations and take interventions when necessary.

基于智能手机的老年人“起床和走”测试自我评估:效度和信度研究。
背景:计时Up和Go测试(TUG)被推荐为一种基于证据的测量身体能力的工具。仪器TUG (iTUG)方法扩展了经典的监督临床应用,为老年人提供了自我评估的潜力。目的:本研究旨在评估基于智能手机的TUG自评“up&go”应用程序的并发效度和重测信度。方法:共招募52名居住在社区的老年人(年龄在60 ~ 67岁之间)。使用经过验证和医学认证的系统作为参考系统,在背部下方附有腰带,以验证“up&go app”算法。参与者将TUG重复了5次,他们在裤子的前口袋里戴着一个装有“up&go”应用程序的智能手机,并戴着一个惯性传感器来测试同时有效性。一个由37名参与者组成的子样本在两周后重复了“up&go app”测量,以检验测试-重测试的可靠性。结果:“up&go app”与参考测量值在总测试时间上的相关系数为r=0.99,在5次单次重复上的相关系数为r=0.97。5个重复间的类内相关系数(ICC)=0.9(0.84 ~ 0.94)。除去第一次重复,协议是ICC=0.95(0.92-0.97)。复试协议的ICC=0.79(0.53-0.9)。结论:使用口袋携带的“up&go app”测量的TUG测试的5次重复持续时间与下背部传感器系统的结果非常一致,表明具有良好的并发效度。参与者在第一轮中走得比在测试中重复的其他4次要慢。重测信度也很好。“up&go应用程序”提供了一种有用的基于智能手机的方法来测量5次重复的TUG。该应用程序可以被老年人用作在家自我筛查和监测身体能力的工具,从而帮助早期识别功能限制,并在必要时采取干预措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
JMIR Aging
JMIR Aging Social Sciences-Health (social science)
CiteScore
6.50
自引率
4.10%
发文量
71
审稿时长
12 weeks
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