Sollentuna Rehabilitation Unit for Older People, Sollentuna, Sweden.
J Geriatr Phys Ther. 2013 Apr-Jun;36(2):74-7. doi: 10.1519/JPT.0b013e318264b8ed.
It is very important to analyze and estimate physical limitations in older people to prevent falls and further physical decline. Walking speed can be used as an outcome measure for evaluating a physical exercise program, but to do so, relative and absolute reliability need to be established. No studies have evaluated the reliability of maximal walking speed in an aged population with different medical diagnoses. Therefore, the aim of this study was to investigate the reliability of walking speed through test retest in older people living in a residential care unit.
A sample of older people living in a residential care unit was invited to participate in the study. Maximal walking speed was measured for a distance of 10 m with an acceleration and deceleration phase of 2 m each. Data were collected twice for each individual within a 1-week interval.
Thirty-one subjects participated on both test occasions. The mean age was 89 years (74-100 years); 25 women and 6 men participated. The test-retest analysis showed an intraclass correlation coefficient (1,1) of 0.86 between the 2 tests. The mean value of the first occasion was 0.97 m/s (SD = 0.30 m/s), and the mean value of the second occasion was 0.95 m/s (SD = 0.29 m/s). The mean difference was -0.03 m/s (SD = 0.16 m/s), and the 95% limits of agreement for the mean difference were -0.33 to 0.27.
A maximum walking speed test in institution-dwelling older people aged 65 years and older, with several different diagnoses, shows high reliability. The method is easy to perform in a clinical setting at a minimal cost and can be recommended for use in this group before and after a training period. However, the variance of -0.33 to +0.27 m/s needs to be considered when evaluating the effect of a training period.
分析和评估老年人的身体限制非常重要，这有助于预防跌倒和进一步的身体衰退。步行速度可作为评估身体锻炼计划的结果测量指标，但要做到这一点，需要建立相对和绝对可靠性。没有研究评估过不同医学诊断的老年人群中最大步行速度的可靠性。因此，本研究的目的是在居住在养老院的老年人中，通过测试-再测试来研究步行速度的可靠性。
邀请居住在养老院的老年人样本参与研究。用加速和减速阶段各 2 米的距离测量 10 米的最大步行速度。每位参与者在一周内两次采集数据。
31 名受试者两次都参加了测试。平均年龄为 89 岁（74-100 岁）；25 名女性和 6 名男性参加了测试。测试-再测试分析显示，两次测试之间的组内相关系数（1,1）为 0.86。第一次测试的平均值为 0.97 m/s（SD = 0.30 m/s），第二次测试的平均值为 0.95 m/s（SD = 0.29 m/s）。平均差值为-0.03 m/s（SD = 0.16 m/s），差值的 95%置信区间为-0.33 至 0.27。
在患有多种不同诊断的 65 岁及以上机构居住的老年人中进行最大步行速度测试，显示出高度的可靠性。该方法在临床环境中易于实施，成本最低，可推荐在训练前后用于该人群。然而，在评估训练期间的效果时，需要考虑到 0.33 至 0.27 米/秒的差异。
