Department of Psychiatry, University of Rochester Medical Center, Rochester, New York.
VISN 2 Center of Excellence for Suicide Prevention, Canandaigua VA Medical Center, Canandaigua, New York.
J Clin Sleep Med. 2018 Jun 15;14(6):1057-1062. doi: 10.5664/jcsm.7180.
To test the sleep-wake scoring reliability of a new wrist-worn sleep monitoring device.
Twenty-seven adult good sleepers underwent 1 night of polysomnography (PSG) while wearing both the new device (myCadian [MC]; CurAegis Technologies, Rochester, New York, United States) and commercially available actigraphy (Actiwatch 2 [AW]; Philips Respironics, Murrysville, Pennsylvania, United States) on their nondominant wrist. PSG tests were manually stage scored. After excluding missing data, 20 participants had full-night data on all three devices with 17,734 total 30-second epochs. Using PSG as the gold standard, pooled epoch-by-epoch agreement for sleep and wake was calculated for each device using percent agreement and Cohen kappa statistic. Positive predictive values for both sleep and wake epochs, as well as sleep continuity statistics, were calculated.
Percent agreement with PSG-scored wake and sleep was 91.3% for MC (kappa = 0.67) and 87.7% for AW (kappa = 0.50). Positive predictive values for sleep epochs were 94.4% and 90.8% for MC and AW, respectively, and 74.5% and 65.6% for wake. Both devices underestimated wake and overestimated sleep compared to PSG. Descriptively, compared to PSG, sleep latency was higher with MC and wake after sleep onset higher with AW. Total sleep time and sleep efficiency were more similar across devices.
The kappa statistic for MC is consistent with a high level of agreement with PSG. Overall, the reliability of MC compared to PSG scoring was slightly more favorable than that of AW. Findings suggest that MC provides reliable sleep-wake scoring during a nocturnal sleep period for good sleepers.
测试新型腕戴式睡眠监测设备的睡眠-觉醒评分可靠性。
27 名成人良好睡眠者在非优势腕部同时佩戴新型设备（myCadian [MC]；CurAegis Technologies，罗彻斯特，纽约，美国）和市售活动记录仪（Actiwatch 2 [AW]；飞利浦 Respironics，默里尔斯维尔，宾夕法尼亚，美国）进行了 1 晚的多导睡眠图（PSG）测试。PSG 测试由手动分期评分。排除缺失数据后，20 名参与者在所有三种设备上均有完整的夜间数据，共 17734 个 30 秒时段。使用 PSG 作为金标准，计算每个设备的睡眠和觉醒的总体时段内的一致性，使用百分比一致性和 Cohen kappa 统计量。还计算了睡眠和觉醒时段的阳性预测值以及睡眠连续性统计量。
MC 与 PSG 评分的觉醒和睡眠的百分比一致性为 91.3%（kappa = 0.67），AW 为 87.7%（kappa = 0.50）。睡眠时段的阳性预测值分别为 MC 和 AW 的 94.4%和 90.8%，觉醒的为 74.5%和 65.6%。与 PSG 相比，两种设备均低估了觉醒，高估了睡眠。描述性地，与 PSG 相比，MC 的睡眠潜伏期较高，AW 的睡眠后觉醒时间较高。总睡眠时间和睡眠效率在设备之间更为相似。
MC 的 kappa 统计量与与 PSG 的高度一致性一致。总体而言，与 PSG 评分相比，MC 的可靠性略优于 AW。研究结果表明，MC 为良好睡眠者提供了可靠的夜间睡眠期间的睡眠-觉醒评分。
