Adams Elizabeth L, Savage Jennifer S, Master Lindsay, Buxton Orfeu M
Center for Childhood Obesity Research, Penn State University, University Park, PA, United States; Department of Nutritional Sciences, Penn State University, University Park, PA, United States.
Department of Biobehavioral Health, Penn State University, University Park, PA, United States.
Sleep Med. 2020 Sep;73:238-245. doi: 10.1016/j.sleep.2020.07.003. Epub 2020 Jul 14.
OBJECTIVE/BACKGROUND: Clinical recommendations include putting infants to bed using a consistent bedtime routine at an appropriate hour to promote longer nighttime sleep. Actigraphy was used in this exploratory study to examine how bedtime routines and nighttime sleep onset were associated with nighttime total sleep time (TST) and efficiency from 6 to 24 weeks of age.
PATIENTS/METHODS: Infants (n = 24) wore sleep actigraphs for three, one-week periods at 6, 15, and 24 weeks of age. Nighttime TST, sleep efficiency, sleep onset and offset were quantified. Mothers reported on infant bedtime routines using the Brief Infant Sleep Questionnaire at each age. Multilevel models examined between- and within-person associations.
As infants aged, sleep onset was earlier, and bedtime routines became shorter (p's < 0.05). Infants fell asleep between 7 and 8:00PM on 24% of the nights. Most mothers (70%) reported that they often fed infants to sleep for the night. For every 1 h earlier in infants' usual sleep onset, nighttime TST was 34.4 min longer that night (p < 0.01). Infants with earlier than usual sleep onset had slightly earlier sleep offset the next morning (8.4 min for every 1 h earlier in onset; p = 0.02). Between-person analyses showed similar patterns. Infants with a more consistent bedtime routine and who were not typically fed to sleep at bedtime had longer nighttime TST at 6 weeks, with a trend or no association at later ages.
Infants who fell asleep earlier also slept longer at night. Keeping infants up later in hopes of them sleeping in longer may be counterproductive.
目的/背景：临床建议包括在适当时间通过一致的睡前程序让婴儿上床睡觉，以促进夜间更长时间的睡眠。本探索性研究使用活动记录仪来检查6至24周龄婴儿的睡前程序和夜间入睡情况与夜间总睡眠时间（TST）及睡眠效率之间的关联。
患者/方法：24名婴儿在6周、15周和24周龄时佩戴睡眠活动记录仪，为期三周，每周佩戴一周。对夜间TST、睡眠效率、入睡和起床时间进行量化。母亲们在每个年龄段使用简短婴儿睡眠问卷报告婴儿的睡前程序。多水平模型检查个体间和个体内的关联。
随着婴儿年龄增长，入睡时间提前，睡前程序变短（p值<0.05）。24%的夜晚婴儿在晚上7点至8点入睡。大多数母亲（70%）报告说她们经常喂婴儿入睡。婴儿通常入睡时间每提前1小时，当晚夜间TST就会延长34.4分钟（p<0.01）。入睡时间比平时早的婴儿第二天早上起床时间也会稍早一点（入睡时间每提前1小时早8.4分钟；p=0.02）。个体间分析显示出类似模式。在6周龄时，睡前程序更一致且通常不在睡前喂奶入睡的婴儿夜间TST更长，在较大年龄时呈趋势或无关联。
入睡较早的婴儿夜间睡眠时间也更长。为了让婴儿多睡会儿而让他们晚睡可能会适得其反。
