Objective: To investigate the prevalence and associated factors of depressive symptoms among junior and senior high school students in Beijing from 2019 to 2023, in order to provide a scientific basis for interventions targeting high risk groups. Methods: From 2019 to 2023, a stratified cluster random sampling method was used to select 88 927 junior and senior high school students from 16 districts in Beijing. The Center for Epidemiologic Studies Depression Scale(CES-D) was conducted to assess depressive symptoms. The Chi square test was used to compare the detection rates of depressive symptoms among different student groups, and the trend Chi square test was employed for trend analysis of detection rates across the years. Multivariate Logistic regression analysis was applied to examine the association between the detection of depressive symptoms and related factors among junior and senior high school students. Results: From 2019 to 2023, the prevalence rates of depressive symptoms among junior and senior high school students in Beijing were 20.45%, 18.19%, 16.64%, 17.89% and 18.17%, respectively, with an overall downward trend ( χ 2 trend =27.51, P <0.01). Multivariate Logistic regression analysis revealed that after adjusting for gender, monitoring year, educational stage,family structure,boarding status and has taken a medical leave of absence in the past year unhealthy dietary behaviors ( OR=1.80, 95%CI =1.73-1.87), physical inactivity ( OR=1.24, 95%CI =1.19-1.29), try smoking ( OR=1.46, 95%CI =1.35-1.58), try alcohol( OR=1.96, 95%CI =1.88-2.05), Internet addiction ( OR=3.88, 95%CI =3.57-4.22), and adverse ear related behavior ( OR=1.82, 95%CI =1.71-1.93) were all associated with an increased risk of depressive symptoms among junior and senior high school students (all P <0.05). Conclusions The prevalence depression symptoms among middle school students in Beijing showed a fluctuating downward trend from 2019 to 2023. Targeted interventions should be adopted to reduce the occurrence of depression symptoms among junior and senior high school students.

Objective: To analyze the current status and related factors of comorbidity of myopia, obesity, and depression symptoms among middle school students in Beijing, so as to provide a basis for comprehensive public health interventions for common diseases. Methods: Through stratified cluster random sampling in October 2022, a total of 11 262 junior high school, senior high school, and vocational high school students in 16 districts of Beijing were surveyed with self administered questionnaires, physical examinations and visual acuity examinations. The χ 2 test and binary Logistic regression model were used to analyze group differences in the comorbidity of myopia, obesity and depression symptoms and factors influencing the comorbidity. Stratified analysis was applied to analyze the associations between health risk behaviors and the comorbidity. Results: The detection rate of comorbidity of myopia, obesity, and depression symptoms among middle school students in Beijing was 3.35%, the comorbidity rate among vocational high school students (4.61%) was higher than that in junior high school students (2.80%) and senior high school students (3.41%). The comorbidity rate was higher among students in suburban areas (3.66%) than that in urban areas (2.92%), and the differences was statistically significant ( χ 2=15.02, 4.63, P <0.05). Binary Logistic regression analyses indicated that middle school students with poor dietary behaviors ( OR =1.59) and excessive screen time ( OR =1.70) were associated with elevated risk of comorbidity of myopia, obesity, and depression symptoms. Both boys and girls with poor dietary behaviors ( OR =1.63, 1.69) and excessive screen time ( OR =1.45, 2.23) had elevated likelihood of comorbidity of myopia, obesity and depression symptoms. Students in junior high school and senior high school with poor dietary behaviors ( OR =2.16, 1.47) and excessive screen time ( OR =2.20, 1.63 ) had elevated likelihood of comorbidity of myopia, obesity, and depression symptoms ( P <0.05). Conclusions The current status of comorbidity of myopia, obesity, and depression symptoms among middle school students in Beijing is concerning. Schools and parents should work together to guide students to develop healthy behaviors such as balanced diet and moderate video, in order to achieve the goal of controlling myopia, obesity and depression symptoms.

Objective: To investigate the comorbidity of screening myopia and scoliosis among primary and secondary school students in Beijing from 2019 to 2022 and its influencing factors, in order to provide new ideas for comprehensive prevention and control of myopia and scoliosis in children and adolescents. Methods: From 2019 to 2022, 34 923, 34 321, 36 008 and 35 598 primary and secondary school students in Beijing were selected by stratified cluster random sampling method, and visual acuity examination, scoliosis examination and questionnaire survey were conducted on them. Chisquare test was used to analyze the intergroup differences between screening myopia and scoliosis among primary and secondary school students, and the correlation factors between screening myopia and scoliosis were analyzed by multivariate Logistic regression. Results: From 2019 to 2022, the prevalence of screening myopia increased by year,while scoliosis decreased by year, and the comorbidity rate in 2022 (0.69%) decreased by 1.62% compared with 2019 (2.31%). In 2022, screening myopia with scoliosis rates (0.98%) than urban suburbs (0.50%), high school students (1.65%) >professional high school students (1.21%) >junior middle school students (0.76%) >primary school students (0.22%) (χ2=28.97, 153.55, P<0.01). The results of multivariate Logistic analysis found that insufficient sleep time and parents did not limit the use of electronic screen time were the risk factors for screening myopia and scoliosis [OR(95%CI)=1.59(1.20-2.12), 1.34(1.02-1.76), P<0.05]. Teachers often or always remind that reading and writing posture and one hour or more of moderateintensity physical activity every day were protective factors for screening myopia and scoliosis [OR(95%CI)=0.70(0.52-0.96), 0.56(0.34-0.92), P<0.05]. Conclusions The comorbidity of acadmic screening myopia and scdiosis is not optimistic in Beijing. Attention should be paid to the reading and writing posture and related behavioral habits of children and adolescents, and ensure that children in each school section have sufficient sleep time, so as to prevent the occurrence and development of screening myopia and scoliosis.