TY  - JOUR
AU  - Kohyama, Jun
PY  - 2019
DA  - 2019/07/22
TI  - Short Sleep in Pupils in Japan: Current Status and Associated Factors
JO  - OBM Neurobiology
SP  - 034
VL  - 03
IS  - 03
AB  - Background: Japan is the most sleepless nation in the world. This study aimed to understand short sleep pupils in Japan. Since academic performance is known to worsen with sleep problems, self-reported academic performance (s-rAP) was also investigated. 
Methods: A total of 1766 completed questionnaires were obtained from grades 7 to 12 pupils in Japan. Queries included issues on sleeping, eating, defecation, physical activity, screen time, after-school activity (ASA), body mass index (BMI) and s-rAP. Multinomial logistic regression analysis, multiple comparison tests and multiple regression analysis were used adequately.
Results: Short sleep pupils were defined as follows in reference to the mean minus 1.5 times the standard deviation of weekend night sleep duration: 7 hours or less for junior high school pupils and 6 hours or less for high school pupils. The rate of short sleep pupils for school nights was 49.9% in junior high school and 48.4% in high school. Multinomial logistic regression analysis revealed that longer weekday screen time and longer ASA were significantly associated with short sleep pupils for school and weekend nights. However, s-rAP was not associated with short sleep pupils. Multiple comparison tests revealed that school night sleep duration, school and weekend night bed time, weekend wake time, sleepiness, eating breakfast, screen time and BMI were significantly different among AP categories. There were no significant differences for s-rAP values between 10-15 and more than 15 hours ASA per week. According to multiple regression analysis, sleep duration was not selected as a significant predictor of s-rAP, while sleepiness, eating breakfast, grade, school day screen time and BMI were selected.
Conclusions: The association between s-rAP and sleep duration remains inconclusive. A recommendation about sleep duration might be gauged from when pupils feel less sleepy.
SN  - 2573-4407
UR  - https://doi.org/10.21926/obm.neurobiol.1903034
DO  - 10.21926/obm.neurobiol.1903034
ID  - Kohyama2019
ER  -