Brooks Dina, Hunter Judith P, Parsons Janet, Livsey Emma, Quirt Janice, Devlin Michael
Clinical Evaluation and Research Unit, West Park Healthcare Centre, 82 Buttonwood Avenue, Toronto, Ontario M6M 2J5, Canada.
Arch Phys Med Rehabil. 2002 Nov;83(11):1562-5. doi: 10.1053/apmr.2002.34600.
To determine inter- and intrarater reliability of the two-minute walk test (2MWT) in individuals with transtibial amputation.
Prospective; test-retest method by a pair of trained physical therapists.
Two regional amputee rehabilitation centers in Canada.
Thirty-three subjects (23 men, 10 women; mean age +/- standard error, 63.6+/-2.0y) with transtibial amputation; 6 in outpatient rehabilitation, 27 in inpatient rehabilitation. The most common primary diagnoses were peripheral vascular disease (n=15) and diabetes (n=11).
Each subject performed a total of four 2MWTs, 1 test for each rater, on 2 consecutive days at approximately the same time of day. Subjects were given at least a 20-minute rest between tests. The order of raters was randomized on the first day and reversed for the next day. The walk tests were performed in the same enclosed corridors with the same starting point for all tests. The subjects were familiar with the test or were given 1 or more practice tests at least 1 day before testing. Subjects were allowed to walk with a mobility aid of their choice. Raters used a digital stopwatch to time the tests and a calibrated wheel with a counter to measure the distance walked in meters. The raters were blinded to each other's scores.
Distance walked in 2 minutes (in meters).
Within-rater reliability was high (intraclass correlation coefficient [ICC],.90-.96). Between rater reliability was also high (ICC.98-.99). Analysis of variance (ANOVA) showed a significant effect for day of test (P<.001) in the inpatient group but no effect for therapist (P=.098) or for interaction of day and therapist (P=.710). Similarly, in the outpatient group, ANOVA showed a significant effect for day (P=.013) but no effect for therapist (P=.259) or interaction of day and therapist (P=.923).
Although the 2MWT showed evidence of inter- and intrarater reliability in individuals with unilateral below-knee amputation, the distance walked in 2 minutes continued to improve over time. This improvement was not solely the result of a training and learning effect.
确定经胫截肢患者两分钟步行测试（2MWT）的评分者间信度和评分者内信度。
前瞻性研究；由一对经过培训的物理治疗师采用重测法。
加拿大的两个地区截肢者康复中心。
33名经胫截肢患者（23名男性，10名女性；平均年龄±标准误，63.6±2.0岁）；6名门诊康复患者，27名住院康复患者。最常见的主要诊断为外周血管疾病（n = 15）和糖尿病（n = 11）。
每位受试者在连续两天的大致相同时间总共进行四次2MWT测试，每位评分者各测试一次。两次测试之间至少给予受试者20分钟休息时间。第一天评分者的测试顺序随机安排，第二天颠倒过来。所有测试均在同一封闭走廊内从相同起点进行。受试者熟悉测试流程，或者在测试前至少一天进行过一次或多次预测试。受试者可使用自己选择的助行器具行走。评分者使用数字秒表记录测试时间，并用带计数器的校准轮测量行走的距离（以米为单位）。评分者彼此不知道对方的评分结果。
两分钟内行走的距离（以米为单位）。
评分者内信度较高（组内相关系数[ICC]，0.90 - 0.96）。评分者间信度也较高（ICC，0.98 - 0.99）。方差分析（ANOVA）显示，住院组中测试日期有显著影响（P <.001），但治疗师无显著影响（P =.098），测试日期与治疗师的交互作用也无显著影响（P =.710）。同样，在门诊组中，方差分析显示测试日期有显著影响（P =.013），但治疗师无显著影响（P =.259），测试日期与治疗师的交互作用也无显著影响（P =.923）。
虽然2MWT在单侧膝下截肢患者中显示出评分者间信度和评分者内信度的证据，但两分钟内行走的距离会随着时间持续改善。这种改善并非仅仅是训练和学习效应的结果。
