Dual-task-related gait changes in transitionally frail older adults: The type of the walking-associated cognitive task matters
Dual-task-related gait changes in transitionally frail older adults: The type of the walking-associated cognitive task matters
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DOI：
10.1159/000081435
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发表时间：
2005-01-01
期刊：
影响因子：
3.5
通讯作者：
Kressig, RW
中科院分区：
文献类型：
--
作者：
Beauchet, O;Dubost, V;Kressig, RW
背景资料：先前已经报道了由于同时执行认知任务而导致的步态模式的变化，并且与老年人跌倒风险增加有关。很少有人知道，在行走时进行的认知任务的类型是否是重要的关于可能的步态干扰在老年跌倒倾向的个人。目的：量化和比较两种不同认知任务对过渡性虚弱老年人步态的影响。测量值：步态进行了测试，在30个过渡虚弱的老年人（平均年龄82.6 +/- 8 7.1岁，90%的女性），而单独行走，执行一个简单的算术任务，或执行任务的语言流畅性。记录步行时间（以秒计）、步数、侧线跨越频率和停止。健康状况进行了评估，使用标准的老年评估工具。使用Speechley和Tinetti的分类来定义参与者的虚弱程度。结果如下：与单独行走相比，在两种双重任务条件下，行走时间和步数均显著增加（p < 0.001）两种双重任务条件之间没有达到显著差异（分别为p = 0.131和p = 0.407），而侧向步态不稳（侧线跨越频率）与向后计数显著相关（p = 0.006），但与语言流畅性任务无关（p = 1）。结论：在过渡性老年人的研究样本中，行走相关的算术任务显着干扰横向步态稳定性，而没有横向步态偏差被认为与语言流畅性任务。因此，我们建议在老年人的双任务步态评估中，注意力分散任务的选择必须谨慎。版权所有（C）2005 S. Karger AG，巴塞尔。
Background: Changes in gait patterns due to a simultaneously performed cognitive task have been reported previously and associated with an increased falling risk among older adults. Little is known whether the type of cognitive task performed while walking is important concerning possible gait interference in older fall-prone individuals. Objective: To quantify and compare the effects of two different cognitive tasks on gait in transitionally frail older adults. Measurements: Gait was tested in 30 transitionally frail older adults (mean age 82.6 +/- 8 7.1 years, 90% female) while either walking alone, performing a simple arithmetic task, or performing a task of verbal fluency. Walking time in seconds, number of steps, frequency of lateral line stepping-over, and stops were recorded. Health status was assessed using standard instruments of geriatric assessment. The classification of Speechley and Tinetti was used to define the participants' degree of frailty. Results: Walking time and number of steps increased significantly under both dual-task conditions compared to walking alone (p < 0.001) without reaching a significant difference between the two dual-task conditions (respectively, p = 0.131 and p = 0.407), whereas lateral gait instability ( frequency of lateral line stepping-over) increased significantly in association with counting backward (p = 0.006) but not with the verbal fluency task ( p = 1). Conclusion: Among the studied sample of transitional older adults, a walking-associated arithmetic task significantly interfered with lateral gait stability, whereas no lateral gait deviations were seen in association with a verbal fluency task. We, therefore, suggest that the choice of the attention-splitting task in dual-task gait assessment among older adults must be made carefully. Copyright (C) 2005 S. Karger AG, Basel.