No significant difference was noted in the time of wakefulness and the sleep efficiency among the three groups .
三组之间觉醒时间及睡眠效率无明显差异。
Results: The first night recordings showed longer sleep latency, decreased sleep efficiency and shorter delta and REM sleep.
结果发现，第一晚的睡眠潜伏期延长，睡眠效率下降，深睡期和快动眼睡眠期减少。
The elderly population characterizes diminution of sleep time, reduction of sleep efficiency, sleep disorder and more hypnotic using, which seems related to cerebral functional deterioration.
老年人以睡眠时间减少、睡眠效率降低、睡眠障碍多、催眠药物使用多为特点，似乎与脑功能退化有关。
Sleep efficiency is the key, Cohen says.
Cohen说高效睡眠是关键。
Sleep efficiency (the time spent asleep compared to time in bed), falls from its high values in youth (95%-98%) to 70%-80% in older age.
睡眠质量(睡眠时间与在床上的时间比)从年轻人的95% - 98%下降到老年人的70% - 80%。
Sleep efficiency (the time spent asleep compared to time in bed), falls from its high values in youth (95%-98%) to 70%-80% in older age.
睡眠质量(睡眠时间与在床上的时间比)从年轻人的95% - 98%下降到老年人的70% - 80%。
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