Physiotherapy Department, Chi Lin Nunnery Elderly Service, 5 Chi Lin Drive, Diamond Hill, Hong Kong.
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
Exp Gerontol. 2019 Jan;115:9-18. doi: 10.1016/j.exger.2018.11.001. Epub 2018 Nov 10.
Walk tests are commonly used to evaluate walking ability in frail older adults with dementia but their psychometric evidence in this population is lacking.
Psychometric study with repeated measures.
Day care and residential care facilities.
Thirty-nine frail older adults with a mean age 87.1 and a diagnosis of dementia or Alzheimer's disease who were able to walk independently for at least 15 m.
The participants underwent a 2-minute walk test (2MWT), 6-minute walk test (6MWT) and 10-meter walk test (10MeWT) on 6 separate occasions under 2 independent assessors using a cueing system. Functional status was measured using the Elderly Mobility Scale (EMS), Berg Balance Scale (BBS) and Modified Barthel Index (MBI).
Excellent test-retest (ICC = 0.91-0.98) and inter-rater reliability (ICC = 0.86-0.96) were shown in the 2MWT, 6MWT and 10MeWT. The walk tests were strongly correlated with each other (ρ = 0.85-0.94). The correlations between the walk tests and the functional measures were moderate in general (ρ = 0.34-0.55). All the walk tests were able to distinguish between those who could walk outdoor and indoor only (p ≤ .036). The MDC were 9.1 m in the 2MWT, 28.1 m in the 6MWT, and.16 m/s in the 10MeWT. The cues provided by the assessors in the walk tests were generally consistent (ICC = 0.62-0.89).
The 2MWT, 6MWT and 10MeWT are reliable and valid measures in evaluating walking ability in frail older adults with dementia. The MDC of the walk tests has been established. The cueing system is feasible and reliable to facilitate the administration of the walk tests in this population group.
步行测试常用于评估痴呆症衰弱老年人的步行能力，但在该人群中，其心理测量学证据尚缺乏。
1）评估在痴呆症衰弱老年人中步行测试的重测信度、评分者间信度、结构效度和已知组别的有效性，以及 95%置信区间（MDC）的最小可检测变化，2）评估在协助参与者完成步行测试中使用提示系统的可行性和一致性。
具有重复测量的心理测量学研究。
日托和养老院。
39 名年龄平均为 87.1 岁且患有痴呆症或阿尔茨海默病的虚弱老年人，他们能够独立行走至少 15 分钟。
参与者在 6 次独立评估中使用提示系统，由 2 名独立评估者进行 2 分钟步行测试（2MWT）、6 分钟步行测试（6MWT）和 10 米步行测试（10MeWT）。功能状态使用老年人移动量表（EMS）、伯格平衡量表（BBS）和改良巴氏指数（MBI）进行测量。
2MWT、6MWT 和 10MeWT 的重测信度（ICC=0.91-0.98）和评分者间信度（ICC=0.86-0.96）均表现出极佳的结果。步行测试之间具有很强的相关性（ρ=0.85-0.94）。一般来说，步行测试与功能测量之间的相关性为中度（ρ=0.34-0.55）。所有步行测试均能够区分那些只能在户外和室内行走的人（p≤0.036）。2MWT 的 MDC 为 9.1 米，6MWT 的 MDC 为 28.1 米，10MeWT 的 MDC 为 0.16 米/秒。评估者在步行测试中提供的提示通常是一致的（ICC=0.62-0.89）。
2MWT、6MWT 和 10MeWT 是评估痴呆症衰弱老年人步行能力的可靠且有效的测量方法。已建立步行测试的 MDC。提示系统在协助该人群进行步行测试的管理方面是可行且可靠的。
