Oluwole O S A
Neurology Unit, Department of Medicine, College of Medicine, University of Ibadan, Ibadan, Nigeria.
Acta Neurol Scand. 2010 Jan;121(1):1-6. doi: 10.1111/j.1600-0404.2009.01171.x. Epub 2009 Nov 26.
Quantity of night sleep is shorter than 8 h in several developed countries, but similar data is not available for most African countries. The objective of this study was to describe the quantity of night sleep, factors that are associated with non-restorative sleep, and sleep habits in a population of undergraduates in Nigeria.
Questionnaires were used to collect information about bedtimes, waketimes, intra-night awakenings, non-restorative sleep, and afternoon naps over a period of 14 days.
Mean duration of night sleep was 6.2 h (median 6.0, range 4.5-9.3), while mean duration of daytime naps was 70 min (median 75, range 10-315). Duration of night sleep was associated with day of the week and gender, but not with BMI. Non-restorative sleep, which occurred 25% of total sleep times, was associated with night sleep < or =5 h, hypnotic use, alarm to wake, heavy workload, and afternoon naps. Intra-night sleep awakening occurred 58.5% of total sleep times. Afternon naps were taken by 225 (82%) of subjects.
Duration of night sleep in this African population is not longer than the duration in Western countries. Intra-night awakening and non-restorative sleep; however, occur more frequently, and afternoon nap is usually in excess of 1 h.
在一些发达国家，夜间睡眠时间不足8小时，但大多数非洲国家尚无类似数据。本研究的目的是描述尼日利亚大学生群体的夜间睡眠时间、与非恢复性睡眠相关的因素以及睡眠习惯。
通过问卷调查收集了14天内的就寝时间、起床时间、夜间觉醒情况、非恢复性睡眠情况以及午睡情况等信息。
夜间睡眠平均时长为6.2小时（中位数为6.0，范围为4.5 - 9.3），而白天午睡平均时长为70分钟（中位数为75，范围为10 - 315）。夜间睡眠时间与星期几及性别有关，与体重指数无关。非恢复性睡眠占总睡眠时间的25%，与夜间睡眠≤5小时、使用催眠药物、被闹钟叫醒、工作量大以及午睡有关。夜间睡眠觉醒占总睡眠时间的58.5%。225名（82%）受试者有午睡习惯。
该非洲人群的夜间睡眠时间并不长于西方国家。然而，夜间觉醒和非恢复性睡眠更为频繁，且午睡通常超过1小时。
