Unver Bayram, Kahraman Turhan, Kalkan Serpil, Yuksel Ertuğrul, Karatosun Vasfi
1 Dokuz Eylül University School of Physical Therapy and Rehabilitation, Izmir - Turkey.
Hip Int. 2013 Nov-Dec;23(6):541-5. doi: 10.5301/hipint.5000073. Epub 2013 Aug 6.
Walking ability is a crucial component of lower extremity function. Assessment of walking after total hip arthroplasty (THA) provides important information about the healing process. Walking endurance, an important functional component of walking, can be reliably measured with the 6-minute walk test (6 mWT). Even though the 6 mWT is commonly used in patients with THA, its reliability has never been reported for this patient population. The aim of this study is to assess the reliability of the test-retest 6 mWT after THA.
Thirty-four patients with THA performed two test trials on the same day, separated by a one hour seated rest. To assess reliability, intra-class correlation coefficient (ICC(2,1)), standard error of measurement (SEM), and smallest real difference (SRD) were calculated.
The 6 mWT showed a high reliability. The patients walked 3.71 metres more at the end of the second 6 mWT in comparison with the first test. The ICC(2,1) (AS(95)), SEM (m), SEM(95) (m) and SRD(95) (m) were 0.96 (0.92), 3.67, 7.19, and 10.17 m respectively.
Reliability of the 6 mWT was high in patients with THA. The 6 mWT is a simple and sensitive method to measure the functional performance in patients with THA in the clinical setting. Moreover, clinicians and researchers can use the 6 mWT to quantify even small changes in functional performance after THA.
步行能力是下肢功能的关键组成部分。全髋关节置换术（THA）后步行能力的评估为愈合过程提供了重要信息。步行耐力是步行的一个重要功能组成部分，可通过6分钟步行试验（6 mWT）可靠地测量。尽管6 mWT常用于THA患者，但该患者群体的可靠性从未被报道过。本研究的目的是评估THA后重测6 mWT的可靠性。
34例THA患者在同一天进行了两次测试试验，中间间隔1小时的坐位休息。为评估可靠性，计算了组内相关系数（ICC(2,1)）、测量标准误差（SEM）和最小真实差异（SRD）。
6 mWT显示出高可靠性。与第一次测试相比，患者在第二次6 mWT结束时多走了3.71米。ICC(2,1)（AS(95)）、SEM（米）、SEM(95)（米）和SRD(95)（米）分别为0.96（0.92）、3.67、7.19和10.17米。
6 mWT在THA患者中可靠性较高。6 mWT是一种在临床环境中测量THA患者功能表现的简单且敏感的方法。此外，临床医生和研究人员可以使用6 mWT来量化THA后功能表现的微小变化。
