Departament of Speech, Physical Therapy and Occupational Therapy, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil.
Master's and Doctoral Programs in Physical Therapy, University Cidade de Sao Paulo, Sao Paulo, Brazil.
Geriatr Gerontol Int. 2018 May;18(5):783-789. doi: 10.1111/ggi.13263. Epub 2018 Jan 26.
The Life-Space Assessment (LSA) assesses mobility from the spaces that older adults go, and how often and how independent they move. Despite its increased use, LSA measurement properties remain unclear. The aim of the present study was to analyze the content validity, reliability, construct validity and interpretability of the LSA for Brazilian community-dwelling older adults.
In this clinimetric study we analyzed the measurement properties (content validity, reliability, construct validity and interpretability) of the LSA administered to 80 Brazilian community-dwelling older adults. Reliability was analyzed by Cronbach's alpha (internal consistency), intraclass correlation coefficients and 95% confidence interval (reproducibility), and standard error of measurement (measurement error). Construct validity was analyzed by Pearson's correlations between the LSA and accelerometry (time in inactivity and moderate-to-vigorous activities), and interpretability was analyzed by determination of the minimal detectable change, and floor and ceiling effects.
The LSA met the criteria for content validity. The Cronbach's alpha was 0.92, intraclass correlation coefficient was 0.97 (95% confidence interval 0.95-0.98) and standard error of measurement was 4.12. The LSA showed convergence with accelerometry (negative correlation with time in inactivity and positive correlation with time in moderate to vigorous activities), the minimal detectable change was 0.36 and we observed no floor or ceiling effects.
The LSA showed adequate reliability, validity and interpretability for life-space mobility assessment of Brazilian community-dwelling older adults. Geriatr Gerontol Int 2018; 18: 783-789.
生活空间评估（LSA）评估老年人去的空间、他们移动的频率和独立性。尽管使用越来越多，但 LSA 的测量特性仍不清楚。本研究旨在分析 LSA 对巴西社区居住老年人的内容效度、信度、结构效度和可解释性。
在这项临床研究中，我们分析了对 80 名巴西社区居住老年人进行的 LSA 的测量特性（内容效度、信度、结构效度和可解释性）。信度通过 Cronbach's alpha（内部一致性）、组内相关系数和 95%置信区间（可重复性）和测量误差的标准误差进行分析。结构效度通过 LSA 与加速度计（不活动和中到剧烈活动时间）之间的 Pearson 相关分析进行分析，可解释性通过确定最小可检测变化、地板和天花板效应进行分析。
LSA 符合内容效度标准。Cronbach's alpha 为 0.92，组内相关系数为 0.97（95%置信区间 0.95-0.98），测量误差的标准误差为 4.12。LSA 与加速度计具有收敛性（与不活动时间呈负相关，与中到剧烈活动时间呈正相关），最小可检测变化为 0.36，我们没有观察到地板或天花板效应。
LSA 显示出足够的可靠性、有效性和可解释性，可用于评估巴西社区居住老年人的生活空间移动性。老年医学与老年病学国际 2018 年；18：783-789。
