Sleep-wake habits of schoolchildren according to grade.

Abstract:

:Five hundred and twelve students aged from 6 to 18 years were administered the morningness-eveningness questionnaire and a sleep log. The mean morningness-eveningness score decreased with grade; this decrease was significant around the seventh grade. The habitual waking time showed no difference among grades but the habitual bedtime became later with grade; thus, the sleep length on weekdays decreased with grade. The percentage of students falling asleep during school lessons significantly increased from the eighth to 12th grade. We found that a delay of sleep phase, reduction of sleep length, increased daytime sleep, and transition to evening type occurred at around the seventh grade.

authors

Shinkoda H,Matsumoto K,Park YM,Nagashima H

doi

10.1046/j.1440-1819.2000.00681.x

subject

Has Abstract

pub_date

2000-06-01 00:00:00

pages

287-9

issue

3

eissn

1323-1316

issn

1440-1819

journal_volume

54

pub_type

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