@article{ref1,
title="Sleep duration and school readiness of Chinese preschool children",
journal="Journal of pediatrics",
year="2015",
author="Tso, Winnie and Rao, Nirmala and Jiang, Fan and Li, Albert Martin and Lee, So-Lun and Ho, Frederick Ka-Wing and Li, Sophia Ling and Ip, Patrick",
volume="169",
number="",
pages="266-271",
abstract="OBJECTIVES: To examine the average sleep duration in Chinese preschoolers and to investigate the association between sleep duration and school readiness. STUDY DESIGN: This is a cross-sectional study that included 553 Chinese children (mean age = 5.46 years) from 20 preschools in 2 districts of Hong Kong. Average daily sleep duration in the last week was reported by parents and school readiness as measured by the teacher-rated Chinese Early Development Instrument (CEDI). <br><br>RESULTS: Most Chinese preschoolers had 9-10 hours of sleep per day. Only 11% of preschoolers had the recommended 11-12 hours of sleep per day. This group was associated with more &quot;very ready&quot; CEDI domains. Sleep deprivation (≤7 hours per day) was associated with a lower CEDI total score, lower scores in the emotional maturity and language/cognitive domain, and prosocial behaviors subdomain but a greater score in the hyperactivity/inattention subdomain. Children with a lower family socioeconomic index, lower maternal education level, infrequent parent-child interactions, and who used electronic devices for more than 3 hours per day had shortened sleep durations. <br><br>CONCLUSIONS: Optimal sleep duration was associated with better school readiness in preschool children, whereas sleep deprivation was associated with lower school readiness, more hyperactivity and inattention, and less prosocial behavior.<p /> <p>Language: en</p>",
language="en",
issn="0022-3476",
doi="10.1016/j.jpeds.2015.10.064",
url="http://dx.doi.org/10.1016/j.jpeds.2015.10.064"
}