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Accelerometer-measured daily steps and subjective cognitive ability in older adults: A two-year follow-up study.
Experimental Gerontology ( IF 3.9 ) Pub Date : 2020-02-10 , DOI: 10.1016/j.exger.2020.110874 Shang-Ti Chen,Clare Stevinson,Tian Tian,Li-Jung Chen,Po-Wen Ku
Experimental Gerontology ( IF 3.9 ) Pub Date : 2020-02-10 , DOI: 10.1016/j.exger.2020.110874 Shang-Ti Chen,Clare Stevinson,Tian Tian,Li-Jung Chen,Po-Wen Ku
There is still a paucity of longitudinal studies examining the relationships between objectively-assessed daily steps and cognitive performance in older adults. The current study aimed to explore whether there is a dose-response relationship between accelerometer-measured daily steps and subjective cognitive decline rate after 2 years in older adults. A total of 285 community-dwelling older adults (age = 74.52 ± 6.12 years, female = 55.4%) wore accelerometers for 7 consecutive days measuring daily steps in 2012. Subjective cognitive ability was measured using a Chinese version of the Ascertain Dementia 8-item Questionnaire (AD8). In total 274 (96.1%) participants completed the follow-up study in 2014. Multivariable negative binomial regression adjusted for confounders was undertaken. Daily steps were linearly related to a reduced decline rate in subjective cognitive ability after 2 years. When daily steps were categorized into groups (<3500, 3500-6999, and ≥7000 steps/day), taking approximately 3500-6999 steps/day was associated with a reduced subjective cognitive decline rate (RR = 0.57, 95% CI = 0.37-0.89) after 2 years compared with <3500 steps/day. When accruing ≥7000 steps/day, the decline rate progressively decreased further (RR = 0.43, 95% CI = 0.23-0.82). Sensitivity analyses supported the stability of these findings. These results suggest that there is an inverse dose-response association of daily steps with subjective cognitive decline rate. Even as few as 3500-6999 steps/day was associated with a lower subjective cognitive decline rate after 2 years. Accumulating ≥7000 steps/day could provide greater protection for subjective cognitive ability.
中文翻译:
加速度计测量的老年人的日常步伐和主观认知能力:一项为期两年的随访研究。
仍然缺乏纵向研究来检查客观评估的每日步数与老年人认知能力之间的关系。当前的研究旨在探讨在加速计测量的每日步数与2年后老年人的主观认知下降率之间是否存在剂量反应关系。2012年,共有285位居住在社区中的老年人(年龄= 74.52±6.12岁,女性= 55.4%)连续7天佩戴加速度计来测量每日步数。使用中文版本的“确定性痴呆症” 8个项目来测量主观认知能力问卷(AD8)。2014年,共有274名(96.1%)参与者完成了随访研究。进行了针对混杂因素调整的多变量负二项式回归。每天的步伐与2年后主观认知能力下降的速率呈线性关系。如果将每日步数归为一组(<3500、3500-6999和≥7000步/天),则每天进行约3500-6999步与降低的主观认知下降率相关(RR = 0.57,95%CI = 0.37) -0.89)2年后,而每天<3500个步骤。当每天累积≥7000步时,下降率逐渐下降(RR = 0.43,95%CI = 0.23-0.82)。敏感性分析支持了这些发现的稳定性。这些结果表明,日常步伐与主观认知下降率呈反比的剂量反应关系。甚至2年后,每天只有3500-6999个步骤与较低的主观认知下降率相关。
更新日期:2020-02-10
中文翻译:
加速度计测量的老年人的日常步伐和主观认知能力:一项为期两年的随访研究。
仍然缺乏纵向研究来检查客观评估的每日步数与老年人认知能力之间的关系。当前的研究旨在探讨在加速计测量的每日步数与2年后老年人的主观认知下降率之间是否存在剂量反应关系。2012年,共有285位居住在社区中的老年人(年龄= 74.52±6.12岁,女性= 55.4%)连续7天佩戴加速度计来测量每日步数。使用中文版本的“确定性痴呆症” 8个项目来测量主观认知能力问卷(AD8)。2014年,共有274名(96.1%)参与者完成了随访研究。进行了针对混杂因素调整的多变量负二项式回归。每天的步伐与2年后主观认知能力下降的速率呈线性关系。如果将每日步数归为一组(<3500、3500-6999和≥7000步/天),则每天进行约3500-6999步与降低的主观认知下降率相关(RR = 0.57,95%CI = 0.37) -0.89)2年后,而每天<3500个步骤。当每天累积≥7000步时,下降率逐渐下降(RR = 0.43,95%CI = 0.23-0.82)。敏感性分析支持了这些发现的稳定性。这些结果表明,日常步伐与主观认知下降率呈反比的剂量反应关系。甚至2年后,每天只有3500-6999个步骤与较低的主观认知下降率相关。