DASS-21 scores and distribution characteristics.

Background
By investigating the depression, anxiety and stress status of secondary school students, we further analysed the influencing factors of the changes in depression, anxiety and stress among secondary school students, so as to provide references for subsequent studies and interventions on adolescent mental health.
Methods
This study was a cross-sectional research study conducted in a city in Southwest China. A questionnaire survey was conducted during March-June 2022 among students attending secondary schools within a city. The surveyed secondary schools were not categorized as public or private. It mainly investigated the general information of middle school students, Depression-Anxiety-Stress Scale (DASS-21), and assessed the mental health status of middle school students.
Results
A total of 2,716 secondary school students were surveyed, 1,230 males (45.29%) and 1,486 females (54.71%). Among them, 24.4% of the secondary school students had depressive symptoms, 41.4% had anxiety symptoms, and 15.6% had stress; Through logistic regression analysis, attending high school, ranking <60% in academic performance, little or no family psychological support and peer psychological support were the main influencing factors.
Conclusion
The present study demonstrated that the high school student population, students with an academic ranking of <60%, and students who lacked family/peer psychological support were at higher risk for mental health. These findings provide an empirical basis for developing graded intervention strategies for specific risk factors..

研究背景：本研究通过调查中学生的抑郁、焦虑与压力现状，进一步剖析中学生抑郁、焦虑及压力水平变化的影响因素，以期为青少年心理健康领域的后续研究与干预实践提供参考依据。
研究方法：本研究为横断面研究，实施地点为中国西南地区某城市。研究于2022年3月至6月期间，针对该市范围内的中学生开展问卷调查。本次调查涉及的中学未区分公立与私立性质。调查内容主要涵盖中学生一般人口学信息、抑郁-焦虑-压力量表（Depression-Anxiety-Stress Scale, DASS-21），以此评估中学生的心理健康状况。
研究结果：本次研究共调查2716名中学生，其中男性1230名（占比45.29%），女性1486名（占比54.71%）。其中24.4%的中学生存在抑郁症状，41.4%存在焦虑症状，15.6%存在压力症状；经logistic回归分析发现，就读高中、学业排名低于60%、家庭心理支持不足或缺失以及同伴心理支持不足或缺失为主要影响因素。
研究结论：本研究结果表明，高中生群体、学业排名低于60%的学生以及缺乏家庭/同伴心理支持的学生，其心理健康风险更高。本研究结果可为针对特定风险因素制定分级干预策略提供实证依据。