Unver Bayram, Kahraman Turhan, Kalkan Serpil, Yuksel Ertugrul, Karatosun Vasfi, Gunal Izge
1 School of Physical Therapy and Rehabilitation, Dokuz Eylül University, Izmir - Turkey.
Hip Int. 2015 Mar-Apr;25(2):160-3. doi: 10.5301/hipint.5000217. Epub 2015 Jan 29.
Stair climbing is one of the important functional activities of daily living to maintain mobility and independence. Walking and stair climbing have been identified by clinicians and patients as critical functional activities before and after total hip arthroplasty (THA). Testing the ability to manage steps has been commonly used in clinical and research settings because it is an inexpensive and simple way to measure functional status after THA. The frequent use of this test supports studies seeking evidence to validate stair test (ST) as a measure of physical performance in subjects with THA. The aim of this study is to determine the test-retest reliability of the 9-step ST in patients with THA.
Patients performed twice trials for the ST on the same day with one hour interval. To assess test-retest reliability, the intra-class correlation coefficient--ICC (2,1), standard error of measurement (SEM), minimal detectable change at the 90% confidence level (MDC90) were calculated.
A total of 37 patients with THA participated in this study. The ST showed very high reliability (ICC = 0.98 (95% CI, 0.96 to 0.99)). The SEM was 0.3 seconds and the MDC90 was 0.7 seconds.
Test-retest reliability of the ST was very high for the patients with THA, and the SEM and MDC90 were adequate for clinical use. The ST is less time consuming and has very high reliability to measure the functional level after THA in the clinical setting.
爬楼梯是日常生活中维持活动能力和独立性的重要功能活动之一。临床医生和患者已将行走和爬楼梯确定为全髋关节置换术（THA）前后的关键功能活动。测试上下台阶的能力在临床和研究环境中普遍使用，因为它是一种测量THA后功能状态的廉价且简单的方法。该测试的频繁使用支持了一些研究，这些研究旨在寻找证据来验证楼梯测试（ST）作为THA患者身体性能的一种测量方法。本研究的目的是确定9步楼梯测试在THA患者中的重测信度。
患者在同一天进行两次ST测试，间隔1小时。为评估重测信度，计算组内相关系数——ICC（2,1）、测量标准误（SEM）、90%置信水平下的最小可检测变化（MDC90）。
共有37例THA患者参与本研究。ST显示出非常高的信度（ICC = 0.98（95%CI，0.96至0.99））。SEM为0.3秒，MDC90为0.7秒。
对于THA患者，ST的重测信度非常高，SEM和MDC90适用于临床使用。在临床环境中，ST测量THA后功能水平的耗时较少且信度非常高。
