【アメリカの正常児の睡眠時間に関する研究】
2歳未満の乳幼児の睡眠時間は12-14時間
2-4歳児は11時間
4-10歳児は10時間
10-16歳児は9時間であった。
この研究結果に対応しCDCは、
乳児は12-14時間
幼児は11-13時間
10-17歳の思春期は8.5-9.5時間
を勧めている。
Williams's team found that until their second birthday, babies in the study slept an average of 12 to 14 hours during each 24-hour period.
By age four that had dropped to about 11 hours of sleep and by age 10, to 10 hours. By age 16, kids were getting an average of about nine hours of sleep per night.
The findings suggest most kids' sleep habits are in step with government guidelines.
According to the CDC, toddlers should be getting 12 to 14 hours of sleep. Preschoolers should get 11 to 13 hours of sleep, and adolescents age 10 to 17 should get 8.5 to 9.5 hours.
Norms and Trends of Sleep Time Among US Children and Adolescents :
Jessica A. Williams, MA; Frederick J. Zimmerman, PhD; Janice F. Bell, PhD
Arch Pediatr Adolesc Med. 2012;():1-6. doi:10.1001/jamapediatrics.2013.423.
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