Sleep disturbance has the largest impact on children's behavior and emotions.

Front Pediatr · 2022 · PMC9744255 · PMID 36518780

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showed a trendno p-value reported

Participants' extracurricular activities, family structure, and family employment status The number (percentage) of children attending cram school was 106 (28.6%), and the number of children and frequency of attendance showed a trend increase in those in a higher grade (data not shown).

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