Bowden Mark G, Behrman Andrea L
Brain Rehabilitation Research Center, Malcom Randall Department of Veterans Affairs Medical Center, Gainesville, FL 32608, USA.
J Rehabil Res Dev. 2007;44(3):355-62. doi: 10.1682/jrrd.2006.03.0033.
Recovery of walking after incomplete spinal cord injury (iSCI) is a common focus of rehabilitation, but few measurement tools capture walking performance outside the clinic or laboratory. This study determined the accuracy and test-retest reliability of the Step Activity Monitor (SAM), a microprocessor-driven accelerometer that measures walking activity. We evaluated 11 individuals with iSCI during replicate 6-minute walk tests (6MWTs) and 10-meter walk tests (10mWTs) scheduled <1 week apart. The SAM was 97% accurate compared with hand-tallied step counts. SAM values were stable across repeated walking performances (intraclass correlation coefficient = 0.97-0.99). Standard error of measurement values were 6.0 steps and 0.8 steps for the 6MWT and 10mWT, respectively. Ninety-five percent confidence intervals were 203.7 to 177.0 steps for the 6MWT and 16.1 to 12.7 steps for the 10mWT. The SAM is an accurate and reliable device for capturing walking activity in individuals with iSCI.
不完全性脊髓损伤（iSCI）后步行功能的恢复是康复治疗的一个常见重点，但很少有测量工具能够在诊所或实验室之外捕捉步行表现。本研究确定了步活动监测仪（SAM）的准确性和重测信度，SAM是一种由微处理器驱动的加速度计，用于测量步行活动。我们对11名iSCI患者进行了评估，在间隔时间<1周的重复6分钟步行试验（6MWT）和10米步行试验（10mWT）期间使用SAM。与人工计数的步数相比，SAM的准确率为97%。在重复的步行表现中，SAM值是稳定的（组内相关系数=0.97-0.99）。6MWT和10mWT测量值的标准误差分别为6.0步和0.8步。6MWT的95%置信区间为203.7至177.0步，10mWT的95%置信区间为16.1至12.7步。SAM是一种准确且可靠的设备，可用于捕捉iSCI患者的步行活动。
