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Gait speed, cognition and falls in people living with mild-to-moderate Alzheimer disease: data from NILVAD
BMC Geriatrics ( IF 4.1 ) Pub Date : 2020-03-30 , DOI: 10.1186/s12877-020-01531-w
Adam H. Dyer , , Brian Lawlor , Sean P. Kennelly

Previous evidence suggests that slower gait speed is longitudinally associated with cognitive impairment, dementia and falls in older adults. Despite this, the longitudinal relationship between gait speed, cognition and falls in those with a diagnosis of dementia remains poorly explored. We sought to assess this longitudinal relationship in a cohort of older adults with mild to-moderate Alzheimer Disease (AD). Analysis of data from NILVAD, an 18-month randomised-controlled trial of Nilvadipine in mild to moderate AD. We examined: (i) the cross-sectional (baseline) association between slow gait speed and cognitive function, (ii) the relationship between baseline slow gait speed and cognitive function at 18 months (Alzheimer Disease Assessment Scale, Cognitive Subsection: ADAS-Cog), (iii) the relationship between baseline cognitive function and incident slow gait speed at 18 months and finally (iv) the relationship of baseline slow gait speed and incident falls over the study period. Overall, one-tenth (10.03%, N = 37/369) of participants with mild-to-moderate AD met criteria for slow gait speed at baseline and a further 14.09% (N = 52/369) developed incident slow gait speed at 18 months. At baseline, there was a significant association between poorer cognition and slow gait speed (OR 1.05, 95% CI 1.01–1.09, p = 0.025). Whilst there was no association between baseline slow gait speed and change in ADAS-Cog score at 18 months, a greater cognitive severity at baseline predicted incident slow gait speed over 18 months (OR 1.04, 1.01–1.08, p = 0.011). Further, slow gait speed at baseline was associated with a significant risk of incident falls over the study period, which persisted after covariate adjustment (IRR 3.48, 2.05–5.92, p < 0.001). Poorer baseline cognition was associated with both baseline and incident slow gait speed. Slow gait speed was associated with a significantly increased risk of falls over the study period. Our study adds further evidence to the complex relationship between gait and cognition in this vulnerable group and highlights increased falls risk in older adults with AD and slow gait speed. Secondary analysis of the NILVAD trial (Clincaltrials.gov NCT02017340; EudraCT number 2012–002764-27). First registered: 20/12/2013.

中文翻译:

轻度至中度阿尔茨海默氏病患者的步态速度,认知和跌倒:来自NILVAD的数据

先前的证据表明,较慢的步态速度在纵向上与认知障碍,痴呆和老年人跌倒有关。尽管如此,在诊断为痴呆症的人中,步态速度,认知和跌倒之间的纵向关系仍然缺乏探索。我们试图评估患有轻度至中度阿尔茨海默病(AD)的老年人群的这种纵向关系。NILVAD数据的分析,该数据是Nilvadipine在轻度至中度AD中为期18个月的随机对照试验。我们检查了:(i)慢步态速度与认知功能之间的横断面(基线)关联;(ii)18个月时基线慢步态速度与认知功能之间的关系(阿尔茨海默氏病评估量表,认知分部:ADAS-Cog ),(iii)基线认知功能与18个月时的慢步速之间的关系,最后(iv)基线慢速与事件的慢速步伐之间的关系在整个研究期间内。总体而言,轻度至中度AD的参与者中有十分之一(10.03%,N = 37/369)达到基线时步态缓慢的标准,另有14.09%(N = 52/369)的人在2011年出现了慢步态18个月。在基线时,较差的认知与较慢的步态速度之间存在显着相关性(OR 1.05,95%CI 1.01–1.09,p = 0.025)。尽管基线慢步态速度与18个月时ADAS-Cog得分的变化之间没有关联,但基线预测的18个月事件慢步态速度的认知严重程度更高(OR 1.04,1.01-1.08,p = 0.011)。进一步,在研究期间基线缓慢的步态速度与重大事故风险相关,在协变量调整后这种风险持续存在(IRR 3.48,2.05-5.92,p <0.001)。较差的基线认知与基线和慢步态速度有关。缓慢的步态速度与研究期间跌倒的风险显着增加有关。我们的研究为这一弱势群体的步态与认知之间的复杂关系提供了进一步的证据,并强调了患有AD且步态速度较慢的老年人的跌倒风险增加。NILVAD试验的二级分析(Clincaltrials.gov NCT02017340; EudraCT号2012–002764-27)。首次注册时间:2013年12月20日。较差的基线认知与基线和慢步态速度有关。缓慢的步态速度与研究期间跌倒的风险显着增加有关。我们的研究为这一弱势群体的步态与认知之间的复杂关系提供了进一步的证据,并强调了患有AD且步态速度较慢的老年人的跌倒风险增加。NILVAD试验的二级分析(Clincaltrials.gov NCT02017340; EudraCT号2012–002764-27)。首次注册时间:2013年12月20日。较差的基线认知与基线和慢步态速度有关。缓慢的步态速度与研究期间跌倒的风险显着增加有关。我们的研究为这一弱势群体的步态与认知之间的复杂关系提供了进一步的证据,并强调了患有AD且步态速度较慢的老年人的跌倒风险增加。NILVAD试验的二级分析(Clincaltrials.gov NCT02017340; EudraCT号2012–002764-27)。首次注册时间:2013年12月20日。NILVAD试验的二级分析(Clincaltrials.gov NCT02017340; EudraCT号2012–002764-27)。首次注册时间:2013年12月20日。NILVAD试验的二级分析(Clincaltrials.gov NCT02017340; EudraCT号2012–002764-27)。首次注册时间:2013年12月20日。
更新日期:2020-04-22
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