@article{ref1,
title="Association of sleep habits with behavior problems and resilience of 6- to 7-year-old children: results from the A-CHILD study",
journal="Sleep Medicine",
year="2018",
author="Doi, Satomi and Fujiwara, Takeo and Ochi, Manami and Isumi, Aya and Kato, Tsuguhiko",
volume="45",
number="",
pages="62-68",
abstract="BACKGROUND: Childhood sleep habits are associated with mental health development; however, little is known about the impact of irregular bedtimes on the mental health of early school-aged children. The aims of this study were to examine the effect of weekday sleep habits (varying bedtimes depending on the night of the week and later than 22:00 h bedtime) on behavior problems, prosocial behavior, and resilience of children aged 6-7 years. <br><br>METHODS: Data were taken from the Adachi Child Health Impact of Living Difficulty (A-CHILD) study, which involved the participation of 4291 caregivers of first-grade children (6-7 years old) living in Adachi City, Tokyo. Resilience (using the Children's Resilient Coping Scale), behavior problems (using the Strength and Difficulties Questionnaire), both modified to range 0-100, and sleep habits were measured via a questionnaire filled out by caregivers. Propensity-score matching was used to determine the associations between irregular and late bedtime, behavior problems, prosocial behavior, and resilience. <br><br>RESULTS: A total of 320 (7.5%) children showed irregular bedtime on school nights and 540 (13.6%) children went to bed later than 22:00 h. Children with irregular bedtimes on weekdays showed lower resilience (β = -3.50, 95% confidence interval (CI) = -5.90 to -1.10) and higher levels of behavior problems (β = 3.29, 95% CI = 1.13-5.46), especially hyperactivity/inattention (β = 5.76, 95% CI = 2.03 to 9.49) and peer relationship problems (β = 3.79, 95% CI = 1.02-6.55). On the other hand, no association between bedtime after 22:00 h and resilience or behavior problems was found. <br><br>CONCLUSION: Among early school-aged children, irregular bedtime on weekdays may be a risk factor for lower resilience and behavior problems.<br><br>Published by Elsevier B.V.<p /> <p>Language: en</p>",
language="en",
issn="1389-9457",
doi="10.1016/j.sleep.2017.12.015",
url="http://dx.doi.org/10.1016/j.sleep.2017.12.015"
}