Nazary-Moghadam Salman, Salavati Mahyar, Esteki Ali, Akhbari Behnam, Keyhani Sohrab, Zeinalzadeh Afsaneh
Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, Vakil abad Blvd, Bahonar Blvd, Pardis Campus, Mashhad, Iran.
Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Koodakyar Ave, Daneshjoo Blvd, Evin, Tehran, Iran.
J Bodyw Mov Ther. 2017 Oct;21(4):852-859. doi: 10.1016/j.jbmt.2017.02.004. Epub 2017 Mar 4.
To define the throughout within- and between-day reliability of gait parameters in single - and dual-task conditions in subjects with and without anterior cruciate ligament deficiency (ACLD).
Fourteen subjects with ACLD and 14 healthy subjects completed a walking task on a treadmill with three levels of velocity (self-selected, high and low), with or without performing an auditory Stroop task over two sessions each 3-5 days apart. The gait kinematic parameters, including maximum and minimum hip flexion, total hip range of motion, maximum and minimum knee flexion and total knee range of motion were recorded using a motion analysis system. The intraclass correlation coefficient (ICC), the standard error of measurement (SEM), and the coefficient of variation (CV) were used to determine inter- and intrasession reliability of kinematic and cognitive measures.
ICCs for ACLD group in dual-task and single task conditions ranged between 0.50 to 0.93 and 0.53 to 0.93, respectively. ICC values for healthy groups in dual-task and single task conditions ranged between 0.36 to 0.90 and 0.39 to 0.87, respectively. When comparing relative reliability across kinematic variables in different velocities, ICC values were generally identical in all three levels of velocity.
The findings suggest that dual-tasking could also be applied reliably for the assessment of functional activities in subjects with and without ACLD.
确定前交叉韧带损伤（ACLD）患者和非ACLD患者在单任务和双任务条件下步态参数在日内和日间的可靠性。
14名ACLD患者和14名健康受试者在跑步机上完成一项步行任务，速度分为三个水平（自选、高和低），在两个 sessions 中分别进行或不进行听觉Stroop任务，每个sessions间隔3 - 5天。使用运动分析系统记录步态运动学参数，包括最大和最小髋关节屈曲、髋关节总活动范围、最大和最小膝关节屈曲以及膝关节总活动范围。组内相关系数（ICC）、测量标准误差（SEM）和变异系数（CV）用于确定运动学和认知测量的组内和组间可靠性。
ACLD组在双任务和单任务条件下的ICC分别在0.50至0.93和0.53至0.93之间。健康组在双任务和单任务条件下的ICC值分别在0.36至0.90和0.39至0.87之间。在比较不同速度下运动学变量的相对可靠性时，所有三个速度水平的ICC值通常相同。
研究结果表明，双任务也可可靠地应用于评估ACLD患者和非ACLD患者的功能活动。
