Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany.
Gerontologist. 2024 Jan 1;64(1). doi: 10.1093/geront/gnad038.
The life-space assessment (LSA) is the most commonly used questionnaire to assess life-space mobility (LSM) in older adults, with well-established psychometric properties for face-to-face (FF) administration. However, these properties have not yet been explicitly studied when the LSA is administered by telephone. The aim of this study was to evaluate the concurrent and construct validity, test-retest reliability, responsiveness, and feasibility of a telephone-based LSA version (TE-LSA) in older adults.
Fifty community-dwelling older adults (age = 79.3 ± 5.3 years) participated in the study. Concurrent validity was assessed against the FF-LSA construct validity by testing 15 a priori hypotheses on expected associations with LSM determinants, test-retest reliability via 2 telephone surveys 1 week apart, responsiveness after 8.5 ± 1.8 months in participants with improved, stable, and worsened mobility defined by 2 external criteria, and feasibility by the completion rate/time and ceiling/floor effects.
Good to excellent agreement between the 2 different administration methods was found (intraclass correlation coefficient [ICC2,1] = 0.73-0.98). Twelve of 15 (80%) hypotheses on construct validity were confirmed. ICCs for test-retest reliability were good to excellent (ICC2,1 = 0.62-0.94). Minimal detectable change for the TE-LSA total score was 20 points. Standardized response means were large for worsened (0.88), moderate for improved (0.68), and trivial for stable participants (0.04). Completion rate was 100% and mean completion time was 5.5 ± 3.3 min. No ceiling or floor effects were observed for the TE-LSA total score.
Telephone administration of the LSA is valid, reliable, responsive, and feasible for assessing LSM in community-dwelling older adults.
生活空间评估（LSA）是评估老年人生活空间移动性（LSM）最常用的问卷，其面对面（FF）管理具有良好的心理测量学特性。然而，当通过电话进行 LSA 时，这些特性尚未被明确研究。本研究旨在评估电话版 LSA（TE-LSA）在老年人中的同时效度、结构效度、重测信度、反应度和可行性。
50 名居住在社区的老年人（年龄=79.3±5.3 岁）参与了这项研究。通过测试 15 个关于与 LSM 决定因素预期关联的先验假设来评估与 FF-LSA 的同时效度，通过 2 次相隔 1 周的电话调查来评估重测信度，通过在定义为 2 个外部标准的改善、稳定和恶化的移动性的参与者中 8.5±1.8 个月后的反应度来评估，通过完成率/时间和天花板/地板效应来评估可行性。
发现两种不同管理方法之间具有良好到极好的一致性（组内相关系数[ICC2,1]为 0.73-0.98）。15 个结构效度假设中有 12 个（80%）得到了证实。重测信度的 ICC 为良好到极好（ICC2,1=0.62-0.94）。TE-LSA 总分的最小可检测变化为 20 分。恶化的标准化反应均值较大（0.88），改善的为中度（0.68），稳定的为轻微（0.04）。TE-LSA 总分的完成率为 100%，平均完成时间为 5.5±3.3 分钟。TE-LSA 总分没有天花板或地板效应。
电话管理 LSA 是评估社区居住的老年人 LSM 的有效、可靠、敏感和可行的方法。
