Department of Physical Therapy, University of Alabama at Birmingham, Birmingham, AL, United States.
Division of Infectious Disease, University of Alabama at Birmingham, Birmingham, AL, United States.
Gait Posture. 2019 Sep;73:246-250. doi: 10.1016/j.gaitpost.2019.07.251. Epub 2019 Jul 26.
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 comparisons: between phones, within phone types, or within phone-by-speed levels. (P-values range 0.06-1.00). While a statistically significant difference was found in all of the time comparisons when performing TUG and 5xSTS (p < 0.0001) except for the between phone comparison with TUG (p = 0.27). For TUG and 5xSTS, the time difference was less than a second when compared to the gold standard and ICCs showed moderate to strong agreement when comparing the phone application to the gold standard (ICCs range 0.60-0.99). These data suggested that the App could validly measure performance of these OMs.
临床医生通常使用 30 秒坐-站（30CST）、计时起立行走测试（TUG）和五次坐-站测试（5xSTS），因为这些结果测量（OMs）对力量、平衡和移动性敏感。
本研究的目的是验证一款可以远程评估 30CST、TUG 和 5xSTS 的定制智能手机应用程序（App）。
31 名健康成年人（年龄范围：22-55 岁；体重 54.6-106.8kg；身高 160-185cm；19 名女性）参加了这项横断面研究。每位参与者以缓慢和正常速度进行 30CST、TUG 和 5xSTS。他们在 App 收集性能数据时，每项 OMs 均进行两次测试，该 App 分别使用 iOS 和 Android 手机收集他们的性能数据。每个测试的金标准是两位研究人员对 30CST 进行的无声计数的平均值，以及两位研究人员使用秒表记录 TUG 和 5xSTS 的时间。研究人员使用组内相关系数（ICC）、皮尔逊 R 系数、符号秩检验和 Wilcoxon 秩和检验分析数据。
所有三种 OMs 的手机记录的表现与直接观察金标准之间都存在显著相关性（r>0.97）。对于 30CST，在以下比较中未发现手机之间、手机类型内或手机速度水平内的计数平均值存在显著差异（P 值范围为 0.06-1.00）。虽然在 TUG 和 5xSTS 的所有时间比较中都发现了统计学上的显著差异（p<0.0001），但除了 TUG 手机之间的比较（p=0.27）。对于 TUG 和 5xSTS，与金标准相比，时间差异小于一秒，ICC 显示当将手机应用程序与金标准进行比较时，具有中度至高度一致性（ICC 范围为 0.60-0.99）。这些数据表明，该 App 可以有效地测量这些 OMs 的表现。
