Construct and predictive validity of a self-reported measure of preclinical mobility limitation
Construct and predictive validity of a self-reported measure of preclinical mobility limitation
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DOI：
10.1016/j.apmr.2007.06.016
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发表时间：
2007-09-01
影响因子：
4.3
通讯作者：
Rantanen, Taina
中科院分区：
文献类型：
--
作者：
Maenty, Minna;Heinonen, Ari;Rantanen, Taina
目的：验证自我报告的临床前活动能力限制概念和自我报告的肌肉力量和步行速度评估方法，并研究临床前活动能力限制对未来明显活动能力限制风险的预测效度。设计：观察性前瞻性队列研究和横断面分析。环境：研究实验室和社区。参与者：共有632名社区生活（年龄范围，75-81岁）的女性和男性参加了基线评估，302人参加了两年半一次的行动限制访谈。干预措施：不适用。主要结局指标：步行速度、肌肉力量、自我报告的临床前和明显的活动能力限制。临床前活动能力限制定义为自我报告的疲劳或无任务困难的任务表现改变。在基线时，根据自我报告的3种活动能力任务（步行2公里，步行0.5公里，爬楼梯）中的任何一种临床前活动能力限制，创建了4个亚组：无限制，临床前限制，轻微和主要明显限制。结果：在基线时，与没有限制或明显限制的参与者相比，临床前活动受限的参与者表现出中等水平的步行速度和肌肉力量。报告基线临床前活动受限的参与者在2年随访期间进展为明显活动受限的年龄和性别调整风险比基线无限制的参与者高3- 6倍，而基线轻度受限的参与者的风险比无限制的参与者高14- 18倍。结论：自我报告评估工具被证明是一种有效的方法，可以捕捉残疾的早期迹象，并且可以作为一种廉价的工具来识别那些未来残疾高风险的非残疾人。
Objectives: To validate self-reported preclinical mobility limitation concept and self-report assessment method against muscle power and walking speed, and to study the predictive validity of preclinical mobility limitation with respect to future risk of manifest mobility limitation.Design: Observational prospective cohort study and crosssectional analysis.Setting: Research laboratory and community.Participants: A total of 632 community-living (age range, 75-81y) women and men took part in the baseline assessments and 302 persons in the semi-annual interviews on mobility limitation over 2 years.Interventions: Not applicable.Main Outcome Measures: Walking speed, muscle power, and self-reported preclinical and manifest mobility limitation. Preclinical mobility limitation was defined as self-reported tiredness or modification of task performance without task difficulty. At baseline, 4 subgroups were created according to self-reported preclinical mobility limitation in any of 3 mobility tasks (walking 2km, walking 0.5km, climbing up stairs): no limitation, preclinical limitation, and minor and major manifest limitation.Results: At baseline, participants with preclinical mobility limitation showed intermediate levels of walking speed and muscle power, compared with those with no limitation or manifest mobility limitation. Participants reporting baseline preclinical mobility limitation had 3- to 6-fold higher age- and sex-adjusted risk of progressing to major manifest mobility limitation during the 2-year follow-up compared with participants with no limitation at baseline, whereas the risk among those with minor limitation at baseline was 14- to 18-fold higher compared with those with no limitation. Conclusions: The self-report assessment tool proved to be a valid measure to capture the early signs of disability and may serve as an inexpensive tool for identifying those nondisabled persons at high risk for future disability.