Department of Physiotherapy and Rehabilitation, Gulhane Faculty of Physiotherapy and Rehabilitation, University of Health Sciences.
Department of Neurology, Gulhane Faculty of Medicine, University of Health Sciences.
Int J Rehabil Res. 2022 Sep 1;45(3):209-214. doi: 10.1097/MRR.0000000000000530. Epub 2022 May 31.
To investigate: (a) the interrater and test-retest reliability of the 3-m backward walk test (3MBW) in ambulant people with multiple sclerosis (PwMS); (b) minimal detectable change (MDC); (c) concurrent and known-groups validity; and (d) the cutoff time to best discriminate fallers from nonfallers with multiple sclerosis (MS). Forty-nine PwMS and 36 healthy people were included in this cross-sectional study. The 3MBW was administered with the timed up and go test, Berg Balance Scale, four square step test, Falls Efficacy Scale-International, and Expanded Disability Status Scale. The 3MBW was simultaneously performed by two independent raters to examine the interrater reliability while was repeated after 7-10 days to examine the test-retest reliability. The 3MBW showed good interrater reliability [intraclass correlation coefficient (ICC) = 0.987-0.989] and excellent test-retest reliability (ICC = 0.854-0.889). The MDC was found to be 1.69 s. The 3MBW had moderate-to-strong correlations with the other measures. For the 3MBW, PwMS had worse performance than healthy people ( P < 0.001), whereas fallers with MS had worse performance than nonfallers with MS ( P < 0.001). The 3MBW time of 7.86 s was determined to best discriminate fallers from nonfallers with MS. The 3MBW is a reliable, simple, and easy-to-administer tool for assessing backward walking among ambulant PwMS.
（a）调查 3 米后退步行测试（3MBW）在多发性硬化症（PwMS）患者中的组内和重测信度；（b）最小可检测变化（MDC）；（c）同时和已知群体的有效性；（d）最佳区分多发性硬化症（MS）跌倒者和非跌倒者的截止时间。本横断面研究纳入了 49 名 PwMS 和 36 名健康人。3MBW 与计时起立行走测试、伯格平衡量表、四方步测试、跌倒效能量表-国际版和扩展残疾状况量表一起进行评估。3MBW 由两名独立评估者同时进行，以检查组内信度，同时在 7-10 天后重复进行，以检查重测信度。3MBW 表现出良好的组内信度（组内相关系数[ICC]为 0.987-0.989）和极好的重测信度（ICC 为 0.854-0.889）。MDC 为 1.69 秒。3MBW 与其他测量指标具有中度至高度相关性。对于 3MBW，PwMS 的表现比健康人差（P<0.001），而 MS 跌倒者的表现比 MS 非跌倒者差（P<0.001）。确定 3MBW 时间为 7.86 秒，可最佳区分 MS 跌倒者和非跌倒者。3MBW 是一种可靠、简单、易于管理的工具，可用于评估行走能力正常的 PwMS 的后退行走能力。
