Volume 62, Issue 6 pp. 716-724
Original Article

Factors associated with sleep duration among pupils

Jun Kohyama

Corresponding Author

Jun Kohyama

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

Correspondence Jun Kohyama, CEO, Tokyo Bay Urayasu Ichikawa Medical Centre, Toudaijima 3-4-32, Urayasu 279-0001, Japan.

Email: [email protected]

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Makoto Ono

Makoto Ono

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Yuki Anzai

Yuki Anzai

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Ai Kishino

Ai Kishino

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Keita Tamanuki

Keita Tamanuki

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Kengo Moriyama

Kengo Moriyama

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Yoko Saito

Yoko Saito

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Runa Emoto

Runa Emoto

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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George Fuse

George Fuse

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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Yoshiho Hatai

Yoshiho Hatai

Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Centre, Urayasu, Japan

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First published: 03 February 2020
Citations: 19

Abstract

Background

Sleep shortage has been pervasive among pupils.

Methods

Multiple regression analysis was used to analyze 2,722 questionnaires obtained from grade 5 to 12 pupils, to determine factors associated with sleep duration.

Results

Significant regression formulae for sleep duration were obtained for all school types: adjusted R2/ P value were 0.14/<0.001 for elementary school; 0.11/<0.001 for junior high school; 0.06/<0.001 for high school. Longer after-school activities (standardized regression coefficient/ P value were −0.22/<0.001 for elementary school; −0.10/<0.01 for junior high school; −0.18/<0.001 for high school) and more sleepiness (−0.09/<0.001 for elementary school; −0.07/<0.05 for junior high school; −0.07/<0.05 for high school) were significantly associated with reduced sleep duration for all school types. In both elementary and junior high schools, the higher grade (−0.53/<0.001 for elementary school; −0.10/<0.01 for junior high school), and longer weekday screen time (−0.15/<0.001 for elementary school; −0.19/<0.001 for junior high school) were also significantly associated with sleep loss. In elementary school, irregular dinner (−0.07/<0.05), breakfast skipping (−0.11/<0.001), longer weekend screen time (−0.09/<0.05) and better self-reported academic performance (0.07/<0.05) also revealed significant associations with sleep loss. In high school, reduction of sleep duration was also significantly associated with higher standardized body mass index (−0.08/<0.05).

Conclusions

Excessive after-school activity might be considered in association with pupils’ sleep reduction.

Disclosure

The authors declare no conflict of interest.

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