This paper presents an evaluation technique for higher-level instrumental activities of daily living (HL-IADLs), which are defined as relatively complicated modern daily activities to perform independently, using micro-Doppler radar (MDR) signatures of sit-to-stand-to-sit (STSTS) movements. Because HL-IADLs are useful for evaluating the degree of disability and cognitive decline in daily life, this study aims to develop a system that enables the identification of individuals with HL-IADL impairments in an unconstrained manner. The study participants were elderly adults of age 65–74 years of rural communities in Japan, and their motion parameters in natural STSTS were extracted via a single 24-GHz MDR installed on the ceiling. Their HL-IADLs were evaluated using a questionnaire-based scale called the Japan Science and Technology Agency Index of Competence (JST-IC). The relationship between the HL-IADLs scaled with the JST-IC and the extracted STSTS parameters were statistically analyzed, and the results revealed that the extracted parameters were associated with the JST-IC score. Furthermore, an appropriately accurate screening method was verified for elderly adults with HL-IADL impairment using the extracted parameters.

中文翻译：

---

通过坐到站到坐运动的微多普勒雷达传感评估日常生活的更高水平的仪器活动

本文提出了一种对更高级别的日常生活工具性活动 (HL-IADL) 的评估技术，HL-IADL 被定义为相对复杂的现代日常活动，可以独立执行，使用微多普勒雷达 (MDR)坐下 (STSTS) 运动。由于 HL-IADL 可用于评估日常生活中的残疾程度和认知能力下降，因此本研究旨在开发一种系统，能够以不受约束的方式识别具有 HL-IADL 障碍的个体。研究参与者是日本农村社区 65-74 岁的老年人，他们在自然 STSTS 中的运动参数是通过安装在天花板上的单个 24-GHz MDR 提取的。他们的 HL-IADL 使用基于问卷的量表进行评估，该量表称为日本科学技术厅能力指数 (JST-IC)。用JST-IC标度的HL-IADLs与提取的STSTS参数之间的关系进行统计分析，结果显示提取的参数与JST-IC评分相关。此外，使用提取的参数验证了具有 HL-IADL 损伤的老年人的适当准确的筛选方法。