Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-Ku, Tokyo 173-0015, Japan.
Gerodontology, Department of Oral Health Science, Faculty of Dental Medicine, Hokkaido University, Kita13, Nishi7, Kita-Ku, Sapporo 060-8586, Japan.
Int J Environ Res Public Health. 2020 Apr 15;17(8):2707. doi: 10.3390/ijerph17082707.
Although there is evidence on the predictors of adverse health outcomes in older individuals, walking speed has typically been measured in laboratory settings (LWS); LWS may be distinct from individuals' actual walking speed in their daily lives (DWS). We examined whether DWS differs from LWS among older adults, and its association with physical frailty. Participants were 90 community-dwelling older adults. A five-meter normal (LWS) and maximum (LWS) walking speed was measured with a stopwatch. DWS was measured using a global positioning system-related smartphone application for one month during their daily lives. DWS, DWS, and DWS were defined as the average, maximum, and standard deviation of walking speed for one month. Participants' mean DWS and DWS were 1.28 m/s and 2.14 m/s, respectively, significantly slower than the mean LWS (1.42 m/s) and LWS (2.24 m/s); the intraclass correlation coefficient between DWS and LWS were 0.188 to 0.341. DWS was significantly correlated with grip strength, one-legged stance, and LWS. The area under the receiver operating characteristic curve of DWS concerning pre-frailty was largest among DWSs, at 0.615, while that of LWS was 0.643. The findings suggest that DWS differs from LWS and is associated with physical function and pre-frailty.
尽管有证据表明老年人的不良健康结果与某些因素相关，但目前通常在实验室环境中测量步行速度（LWS）；LWS 可能与个体日常生活中的实际步行速度（DWS）不同。我们检验了老年人的 DWS 是否与 LWS 存在差异，以及与身体虚弱的关联。参与者为 90 名居住在社区中的老年人。使用秒表测量 5 米正常（LWS）和最大（LWS）步行速度。在日常生活中使用与全球定位系统相关的智能手机应用程序测量一个月的 DWS。DWS、DWS 和 DWS 分别定义为一个月的平均、最大和步行速度标准差。参与者的平均 DWS 和 DWS 分别为 1.28 m/s 和 2.14 m/s，明显慢于平均 LWS（1.42 m/s）和 LWS（2.24 m/s）；DWS 与 LWS 之间的组内相关系数为 0.188 至 0.341。DWS 与握力、单腿站立和 LWS 显著相关。DWS 区分衰弱前期的受试者的受试者工作特征曲线下面积最大，为 0.615，而 LWS 的面积为 0.643。研究结果表明，DWS 与 LWS 不同，与身体功能和衰弱前期相关。
