Raj Rishi, Mojazi Amiri Hoda, Wang Helen, Nugent Kenneth M
Northwestern University, Chicago, IL, USA.
J Prim Care Community Health. 2014 Apr 1;5(2):128-33. doi: 10.1177/2150131913506226. Epub 2013 Oct 7.
To determine the performance characteristics of gait speed measurements and the physiological cost index (PCI; heart rate change/gait speed) in working adults.
Gait speeds, heart rate changes, and non-steady state PCIs were calculated in 61 volunteers who worked in our health sciences center. These subjects completed 9 separate 100-foot walk tests in 3 separate sessions.
The mean heart rate change after a 100-foot walk was 16.6 ± 8.1 beats per minute. The mean gait speed was 76.1 ± 9.6 meters per minute, and the mean PCI was 0.22 ± 0.11 beats per meter. There were highly significant correlations among all measurements on the 9 separate tests (correlation coefficients 0.41-0.95); gait speed measurements had the highest correlations (0.91-0.95). In a multivariable model hypertension and arthritis were associated with reduced gait speeds.
Gait speed, heart rate changes, and non-steady state PCIs have good repeatability when measured over short walks. This information provides a rapid physiological assessment and a method for measuring changes in functional status in healthy subjects and most patients.
确定在职成年人步态速度测量和生理成本指数（PCI；心率变化/步态速度）的性能特征。
计算了在我们健康科学中心工作的61名志愿者的步态速度、心率变化和非稳态PCI。这些受试者在3个不同的时间段内完成了9次单独的100英尺步行测试。
100英尺步行后的平均心率变化为每分钟16.6±8.1次心跳。平均步态速度为每分钟76.1±9.6米，平均PCI为每米0.22±0.11次心跳。在9次单独测试中的所有测量值之间存在高度显著的相关性（相关系数为0.41 - 0.95）；步态速度测量的相关性最高（0.91 - 0.95）。在多变量模型中，高血压和关节炎与步态速度降低有关。
在短距离步行中测量时，步态速度、心率变化和非稳态PCI具有良好的重复性。这些信息为健康受试者和大多数患者提供了快速的生理评估以及测量功能状态变化的方法。
