Research Group Lifestyle and Health, Utrecht University of Applied Sciences, Utrecht, the Netherlands.
Research Group Lifestyle and Health, Utrecht University of Applied Sciences, Utrecht, the Netherlands.
J Stroke Cerebrovasc Dis. 2020 Apr;29(4):104637. doi: 10.1016/j.jstrokecerebrovasdis.2020.104637. Epub 2020 Jan 30.
The most common methods to calculate energy costs are based on measured oxygen uptake during walking a standardized distance or time. Unfortunately, it is unclear which method is most reliable to determine energy cost of walking in stroke survivors. The objective of this study was to evaluate the 3 most commonly used methods for calculating oxygen consumption and -cost by assessing test-retest reliability and measurement error in community dwelling chronic stroke survivors during a 6 Minute Walk Test.
In this secondary analysis of a longitudinal study, reproducibility of the outcome of walking distance, walking speed, oxygen consumption and oxygen cost from 3 methods (Kendall's tau, assumed steady-state and total walking time oxygen consumption) were determined using Intraclass Correlation Coefficient, Standard Error of Measurement and Smallest Detectable Change.
20 from the 31 participants successfully performed the 6 minute walk test-retest within a timeframe of 1 month. Within the 2 tests the reproducibility of walking distance and walking speed was high. The 3 methods to determine reproducibility for oxygen cost and oxygen consumption were considered good (Kendall's tau), good (assumed steady-state) and excellent (total walking time).
The method using oxygen consumption and -cost over the total walking time resulted in the highest reproducibility considering the Intraclass Correlation Coefficient, its 95% Confidence Interval, and smaller absolute differences.
计算能量消耗最常用的方法是基于测量步行标准距离或时间时的耗氧量。不幸的是，目前尚不清楚哪种方法最可靠，能够确定脑卒中幸存者行走的能量消耗。本研究的目的是通过评估社区居住的慢性脑卒中幸存者在 6 分钟步行测试中的测试-重测可靠性和测量误差，来评估计算耗氧量和耗氧成本的 3 种最常用方法。
这是一项纵向研究的二次分析，使用组内相关系数、测量误差和最小可检测变化来确定距离、速度、耗氧量和耗氧成本的 3 种方法（肯德尔 tau 法、假设稳定状态和总步行时间耗氧量）的结果的可重复性。
在 1 个月的时间内，31 名参与者中有 20 名成功地进行了 6 分钟步行测试-重测。在这两项测试中，步行距离和速度的可重复性很高。用于确定氧成本和氧消耗可重复性的 3 种方法被认为是良好的（肯德尔 tau 法）、良好的（假设稳定状态）和优秀的（总步行时间）。
考虑到组内相关系数、其 95%置信区间和更小的绝对差异，使用总步行时间的耗氧量和耗氧量的方法得出了最高的可重复性。
