Kawada Tomoyuki
Nippon Medical School, Tokyo, Japan.
Behav Res Methods. 2008 Nov;40(4):1026-9. doi: 10.3758/BRM.40.4.1026.
Agreement rates for waking and sleeping obtained via sleep diary and accelerometer were evaluated, to compare the two methods. Sleep/wake data for consecutive days and nights were surveyed in 119 healthy university students. Accelerometer sleep/wake judgments obeyed the standard algorithm. Agreement rates for waking and sleeping according to accelerometer versus sleep diary, respectively, were calculated. Sleep diary data were set as a baseline. Seventy-six subjects (63.9%), 22 to 32 years of age, presented perfect data for the analysis. The mean sleep times, in minutes, judged by sleep diary and by accelerometer, were 482.3 and 629.6, respectively. The mean percentages and standard deviations of agreement on wake and sleep were 77.5% (SD = 10.2) and 86.1% (SD = 6.2), respectively. There was a significant negative relationship between the agreement rates for wake and sleep (r = -.482, p < .01). The accelerometer showed some measurement failure during waking, presumably because of the decrease in body movement. Sleep diary data during daytime appear to be more valid for detecting a sleep/wake cycle than are accelerometer data. In contrast, nocturnal sleep diary data might be supplemented by the use of an accelerometer as long as participants do not have insomnia.
通过睡眠日记和加速度计获得的清醒和睡眠的一致率进行了评估,以比较这两种方法。对119名健康大学生连续数天和数夜的睡眠/清醒数据进行了调查。加速度计的睡眠/清醒判断遵循标准算法。分别计算了加速度计与睡眠日记的清醒和睡眠一致率。将睡眠日记数据作为基线。76名年龄在22至32岁之间的受试者(63.9%)提供了用于分析的完美数据。通过睡眠日记和加速度计判断的平均睡眠时间分别为482.3分钟和629.6分钟。清醒和睡眠的一致率的平均百分比和标准差分别为77.5%(SD = 10.2)和86.1%(SD = 6.2)。清醒和睡眠的一致率之间存在显著的负相关(r = -.482,p <.01)。加速度计在清醒期间出现了一些测量失败,可能是由于身体活动减少。白天的睡眠日记数据在检测睡眠/清醒周期方面似乎比加速度计数据更有效。相比之下,只要参与者没有失眠,夜间睡眠日记数据可以通过使用加速度计来补充。