BACKGROUND Real-life community mobility measures for older adults, especially those with Parkinson's disease, are important tools when helping individuals maintain optimal function and quality of life. This is one of the first studies to compare an objective GPS sensor and subjective self-report community mobility measures in an older clinical population. METHODS Over 14 days, 54 people in Ontario, Canada with early to mid-stage Parkinson's Disease (mean age = 67.5 ± 6.3 years; 47 men; 46 retired) wore a wireless inertial measurement unit with GPS (WIMU-GPS), and completed the Life Space Assessment and mobility diaries. We assessed the convergent validity, reliability and agreement on mobility outcomes using Spearman's correlation, intraclass correlation coefficient and Bland-Altman analyses, respectively. RESULTS Convergent validity was attained by the WIMU-GPS for trip frequency (rs = 0.69, 95% CI = 0.52 to 0.81) and duration outside (rs = 0.43, 95% CI = 0.18 to 0.62), but not for life space size (rs = 0.39, 95% CI = 0.14 to 0.60). The Life Space Assessment exhibited floor and ceiling effects. Moderate agreements were observed between WIMU-GPS and diary for trip frequency and duration (intraclass correlation coefficients = 0.71, 95% CI = 0.51 to 0.82; 0.67, 95% CI = 0.42 to 0.82, respectively). Disagreement was more common among non-retired individuals. CONCLUSIONS WIMU-GPS could replace diaries for trip frequency and duration assessments in older adults with Parkinson's Disease. Both assessments are best used for retired persons. However, the Life Space Assessment may not reflect actual mobility.

中文翻译：

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将基于GPS的社区流动性测量与帕金森氏病老年人的自我报告评估进行比较。

背景技术当帮助个体维持最佳功能和生活质量时，针对老年人，特别是患有帕金森氏病的老年人的现实生活中的社区活动性测量是重要的工具。这是在一个较老的临床人群中比较客观GPS传感器和主观自我报告社区流动性措施的首批研究之一。方法在14天的时间里，加拿大安大略省的54人患有帕金森氏病的早期至中期（平均年龄= 67.5±6.3岁； 47名男性； 46名退休），佩戴了带有GPS（WIMU-GPS）的无线惯性测量装置，并完成了生命空间评估和流动日记。我们分别使用Spearman相关，类内相关系数和Bland-Altman分析评估了流动性结果的收敛效度，可靠性和一致性。结果WIMU-GPS对于跳闸频率（rs = 0.69，95％CI = 0.52至0.81）和外部持续时间（rs = 0.43，95％CI = 0.18至0.62）达到了收敛效度，但对于生命空间大小（ rs = 0.39，95％CI = 0.14至0.60）。生命空间评估展示了地板和天花板的影响。观察到WIMU-GPS与日记之间的旅行频率和持续时间有适度的一致性（类内相关系数分别为0.71、95％CI = 0.51至0.82； 0.67、95％CI = 0.42至0.82）。在非退休人士中，意见分歧更为普遍。结论WIMU-GPS可以代替帕金森氏病老年人的出行频率和持续时间评估日记。两种评估最适合退休人员使用。但是，生命空间评估可能无法反映实际的机动性。