Since sleep is under circadian and homeostatic regulation, the status of regulatory mechanisms can be known from daily activity patterns, including both sleep and wake states. Therefore, the relationship between their quantitative characterization and associated subjective QOL can be expected to provide practical knowledge for maintaining/improving QOL. An index quantifying the consistency of daily activity patterns over days, the activity consistency index (ACI), was developed, and its correlations with subjective QOL ratings based on the Pittsburgh sleep quality index (PSQI) and the Kessler Psychological Distress Scale (K6) were analyzed using actigraphy data obtained from university students and IT workers. The consistency of the parametrically transformed actigraphy data was quantified using a parameter set tuned to optimize an ensemble correlation between the consistency measure and QOL. Comparisons of ACI with a previously proposed index (SRI: sleep regularity index) were made according to their correlations with the participants’ subjective ratings of QOL. The comparison of ACI and SRI with respect to the various quantitative features of daily activity revealed that ACI tuned to PSQI was correlated only with mean sleep-onset time and mean sleep duration, while SRI was correlated with most of the quantitative features of sleep. In addition, the correlation profile showed gender dependency. For male and female subjects in their 20 s, the analysis indicated a significant correlation between PSQI and ACI, but not between PSQI and SRI. ACI was shown to work well as an index of daily activity patterns relevant to subjective sleep quality. This ability suggests that ACI could be a basis for predicting subjective sleep quality. Through evaluating daily activity patterns using ACI, an individual may be able to select an appropriate lifestyle for maintaining/improving QOL.

中文翻译：

---

日常活动模式的一致性指数及其与生活质量主观评价的相关性

由于睡眠受昼夜节律和体内平衡调节，因此可以从日常活动模式（包括睡眠和清醒状态）了解调节机制的状态。因此，它们的定量表征与相关主观 QOL 之间的关系有望为维持/改善 QOL 提供实用知识。开发了一个量化每天活动模式一致性的指标，即活动一致性指数 (ACI)，其与基于匹兹堡睡眠质量指数 (PSQI) 和凯斯勒心理困扰量表 (K6) 的主观 QOL 评级的相关性为使用从大学生和 IT 工作者那里获得的活动记录数据进行分析。使用参数集来量化参数转换后的活动记录数据的一致性，以优化一致性度量和 QOL 之间的整体相关性。ACI 与先前提出的指数（SRI：睡眠规律指数）的比较是根据它们与参与者对 QOL 的主观评价的相关性进行的。ACI 和 SRI 在日常活动的各种定量特征方面的比较表明，调整到 PSQI 的 ACI 仅与平均入睡时间和平均睡眠持续时间相关，而 SRI 与睡眠的大多数定量特征相关。此外，相关性曲线显示出性别依赖性。对于 20 多岁的男性和女性受试者，分析表明 PSQI 和 ACI 之间存在显着相关性，但 PSQI 和 SRI 之间没有显着相关性。ACI 被证明可以很好地作为与主观睡眠质量相关的日常活动模式的指数。这种能力表明 ACI 可以作为预测主观睡眠质量的基础。通过使用 ACI 评估日常活动模式，个人可能能够选择合适的生活方式来维持/改善 QOL。