Abstract: Objective To investigate the sleep disorder and its influencing factors among children and adolescents aged 3-16 years, and to provide the scientific basis for intervening the occurrence and development of children’s sleep disorder. Methods A multi-stage random sampling method was utilized to select school-aged children and adolescents from kindergartens, primary schools, and middle schools in Bengbu City to investigate the sleep disorder and its related factors. The descriptive analysis method was used to analyze the incidence of sleep disorder among children and adolescents, and binary logistic regression analysis model was used to analyze the influencing factors of sleep disorder. Results A total of 6 095 children and adolescents aged 3-16 years in Bengbu City were investigated, among them 1 798 cases （29.50%） were diagnosed with sleep disorder. Binary logistic regression analysis indicated that children and adolescents who slept alone （OR=0.517）, were exposed to snoring from their father and/or mother （OR=1.402）, had a high degree of mobile phone use （OR=2.006）, and suffer from high study pressure （OR=11.257） were more likely to experience sleep disorder. Conclusions The incidence of sleep disorder among children and adolescents aged 3-16 years is high in Bengbu City. Sleeping alone, snoring of father and/or mother, high degree of mobile phone use, and high study pressure are independent risk factors affecting children and adolescents’ sleep disorder. Aiming at the independent risk factors, conscious intervention or alleviation or can reduce and avoid the health risks caused by sleep disorder.

Key words: Children and adolescents, Sleep disorder, Symptom, Influencing factor