Department of Physiotherapy, Monash University, Victoria, Australia.
Arch Phys Med Rehabil. 2011 Jan;92(1):51-8. doi: 10.1016/j.apmr.2010.08.023.
To investigate the clinimetric properties of the de Morton Mobility Index (DEMMI) in healthy, community-dwelling older adults.
Cohort study.
Retirement village and Returned and Services League (RSL) club in Melbourne, Australia.
All participants were 65 years or older, healthy, and living within the community. The validation study included participants recruited from a retirement village (n=61), and the reliability studies included participants recruited from an RSL club and a subset of participants from the retirement village.
Not applicable.
Mobility was assessed using the DEMMI. The percentage of participants who scored the highest and lowest possible score on the DEMMI was calculated to determine whether a floor or ceiling effect occurred. The minimal clinically important difference (MCID) was estimated using a distribution-based method. Reliability was assessed independently and concurrently using the minimal detectable change at 90% confidence (MDC₉₀).
Evidence of convergent and discriminant validity was obtained for the DEMMI by examining correlations with measures of related constructs, the Lower Extremity Functional Scale (r=.69) and Quality of Life Scale scores (r=.28), respectively. Participants who ambulated without a gait aid (82.62±10.63) had significantly higher (P<.0) DEMMI scores than those who ambulated with an aid (64.1±12.40), providing evidence of known groups validity. No floor or ceiling effect was identified. The MCID was 7 points. The MDC₉₀ was 13 (95% CI, 8.76-17.05) points on the 100-point scale.
DEMMI scores in healthy, community-dwelling older adults are both valid and reliable.
调查德莫顿活动指数（DEMMI）在健康、社区居住的老年人中的临床计量学特性。
队列研究。
澳大利亚墨尔本的退休村和退伍军人协会（RSL）俱乐部。
所有参与者均为 65 岁或以上、健康且居住在社区中的老年人。验证研究包括从退休村招募的参与者（n=61），可靠性研究包括从 RSL 俱乐部招募的参与者和退休村的一部分参与者。
不适用。
使用 DEMMI 评估移动能力。计算得分最高和最低的参与者百分比，以确定是否存在地板或天花板效应。使用基于分布的方法估计最小临床重要差异（MCID）。使用 90%置信度下的最小可检测变化（MDC₉₀）独立和同时评估可靠性。
通过检查与相关结构测量的相关性，获得了 DEMMI 的收敛和判别有效性证据，分别为下肢功能量表（r=.69）和生活质量量表评分（r=.28）。无需助行器行走的参与者（82.62±10.63）的 DEMMI 得分明显高于使用助行器行走的参与者（64.1±12.40），这提供了已知组有效性的证据。未发现地板或天花板效应。MCID 为 7 分。MDC₉₀在 100 分制上为 13 分（95%CI，8.76-17.05）。
健康、社区居住的老年人的 DEMMI 评分既有效又可靠。
