Choice stepping reaction time: A composite measure of falls risk in older people
Choice stepping reaction time: A composite measure of falls risk in older people
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DOI：
10.1093/gerona/56.10.m627
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发表时间：
2001-10-01
影响因子：
5.1
通讯作者：
Fitzpatrick, RC
中科院分区：
文献类型：
--
作者：
Lord, SR;Fitzpatrick, RC
背景本研究调查了神经心理学，感觉运动，速度和平衡的贡献，一个新的测试选择步进反应时间（CSRT），并确定是否这个新的测试是一个重要的预测福尔斯在老年人。共有477名年龄在62至95岁（平均值+/- SD，79.2 +/- 6.2岁）的退休村居民参加了CSRT测试，该测试要求他们走到随机顺序照明的四个面板中的一个。受试者还接受了神经心理学、感觉运动、速度和平衡功能的测试。多元回归分析显示，在连线测试（一种神经心理学测试）的B部分中表现不佳、股四头肌力量受损、简单反应时间、在柔顺表面上睁着眼睛摇摆、最大平衡范围是CSRT增加的最佳预测因素（多重r（2）= 0.45）。与非跌倒者相比，有福尔斯跌倒史的受试者CSRT显著增加（分别为1322 +/- 331毫秒和1168 +/- 203毫秒）。CSRT受损是福尔斯的一个重要且独立的预测因素，两个互补的感觉测量（视觉对比敏感度和下肢本体感觉）也是如此。在这些指标中，CSRT在预测福尔斯中是最重要的。此外，CSRT在模型中的纳入排除了力量，中央处理速度和平衡的措施，因为这些不能提供非冗余的信息预测跌倒。这项研究确定了一种新的测试，提供了一个复合措施的福尔斯风险在老年人和阐明的相对重要性，特定的生理和神经心理系统在启动快速和适当的阶跃反应。
Background. This study investigated the neuropsychological, sensorimotor, speed, and balance contributions to a new test of choice stepping reaction time (CSRT) and determined whether this new test is an important predictor of falls in older people.Methods. A total of 477 retirement-village residents aged 62 to 95 years (mean +/- SD, 79.2 +/- 6.2 years) took the CSRT test, which required them to step onto one of four panels that were illuminated in a random order. The subjects also took tests that measured neuropsychological, sensorimotor, speed, and balance function.Results. Multiple regression analysis revealed that poor performance, in Part B of the Trail Making Test (a neuropsychological test) and impaired quadriceps strength, simple reaction time, sway with eyes open on a compliant surface, and maximal balance range were the best predictors of increased CSRTs (multiple r(2) = .45). Subjects with a history of falls had significantly increased CSRTs compared with nonfallers (1322 +/- 331 milliseconds and 1168 +/- 203 milliseconds, respectively). Impaired CSRT was a significant and independent predictor of falls, as were two complementary sensory measures (visual contrast sensitivity and lower limb proprioception). Of these measures, CSRT was the most important in predicting falls. Furthermore, the inclusion of CSRT in the model excluded measures of strength, central processing speed, and balance, because these could not provide nonredundant information for the prediction of falls.Conclusions. This study identifies a new test that provides a composite measure of falls risk in older people and elucidates the relative importance of specific physiological and neuropsychological systems in the initiation of fast and appropriate step responses.