Li Xinzhu, Halaki Mark, Chow Chin Moi
Sydney School of Health Sciences, Faculty of Medicine and Health, University of Sydney, Camperdown, NSW 2050, Australia.
Sensors (Basel). 2025 May 12;25(10):3040. doi: 10.3390/s25103040.
This study evaluated the agreement between MotionWatch8 actigraphy and polysomnography (PSG) in measuring sleep parameters among menopausal women under controlled 30 °C laboratory conditions. Sixteen peri- and post-menopausal women (age: 51.4 ± 4.2 years, BMI: 26.0 ± 3.1 kg/m) contributed 59 nights of simultaneous recordings, with parameters analyzed using Bland-Altman plots, linear mixed model analysis, and epoch-by-epoch comparisons. Results showed MotionWatch8 significantly overestimated total sleep time by 18.6 min and sleep efficiency by 3.5%, while underestimating sleep onset latency by 11.2 min and wake after sleep onset by 9.1 min compared to PSG. Significant proportional errors were observed, particularly for participants with prolonged sleep onset latency, high wake after sleep onset, and lower sleep efficiency. Epoch-by-epoch analysis revealed high sensitivity for sleep detection (94.8%) but low specificity for wake detection (33.1%), with 87.3% overall accuracy. These findings demonstrate that MotionWatch8 may be less reliable for individuals with more extreme sleep characteristics, such as insomnia, as measurement accuracy declines with increasing severity of sleep disturbances, highlighting the need for caution when using this device for detailed sleep assessments in clinical populations with sleep disturbances.
本研究评估了在30°C可控实验室条件下，MotionWatch8活动记录仪与多导睡眠图（PSG）在测量更年期女性睡眠参数方面的一致性。16名围绝经期和绝经后女性（年龄：51.4±4.2岁，体重指数：26.0±3.1kg/m²）提供了59个夜晚的同步记录，并使用Bland-Altman图、线性混合模型分析和逐段比较对参数进行了分析。结果显示，与PSG相比，MotionWatch8显著高估了总睡眠时间18.6分钟，高估了睡眠效率3.5%，同时低估了入睡潜伏期11.2分钟，低估了睡眠中觉醒时间9.1分钟。观察到显著的比例误差，特别是对于入睡潜伏期延长、睡眠中觉醒时间长和睡眠效率较低的参与者。逐段分析显示，睡眠检测的敏感性较高（94.8%），但觉醒检测的特异性较低（33.1%），总体准确率为87.3%。这些发现表明，对于具有更极端睡眠特征（如失眠）的个体，MotionWatch8可能不太可靠，因为随着睡眠障碍严重程度的增加，测量准确性会下降，这突出了在临床睡眠障碍人群中使用该设备进行详细睡眠评估时需要谨慎。
