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Abstract：
BACKGROUND: Declining physical activity and increasing screen time (ST) among Chinese adolescents have become major concerns shared by scholars, while mental health issues are also on the rise. Previous studies have confirmed the association between physical activity and screen time and psychological symptoms, but it is unclear how their psychological symptoms, especially for Chinese university students who have a high proportion of psychological symptoms, and no research evidence has been found.
METHODS: This study investigated physical activity, screen time, and psychological symptoms in 11,173 university students aged 19-22 years in six regions of China. A binary logistic regression analysis was used to analyze the association between moderate-to-vigorous physical activity (MVPA) and screen time and psychological symptoms. And the generalize linear model (GLM) analysis was used to further analyze the association between MVPA and screen time and psychological symptoms.
RESULTS: The detection rate of psychological symptoms among Chinese university students was 16.3%, with a higher percentage of female students (17.5%) than male students (14.7%). The proportion of male students (8.2%) with MVPA > 60 min/d was higher than that of female students (2.3%), and the proportion of male students (33.8%) and female students (34.5%) with screen time > 2 h/d was basically the same. The generalize linear model (GLM) analysis showed that university students with MVPA < 30 min/d and screen time > 2 h/d (OR = 1.59, 95% CI: 1.10-2.31) had the highest risk of psychological symptoms (OR = 1.59, 95% CI: 1.10-2.31) compared to university students with MVPA > 60 min/d and screen time < 1 h/d as the reference group. The risk of psychological symptoms was the highest among those with MVPA < 30 min/d and screen time > 2 h/d (OR = 1.59,95% CI: 1.10-2.31). In addition, university students with MVPA > 60 min/d and a screen time of 1-2 h/d (OR = 0.09, 95% CI: 0.03-0.25) had the lowest risk of psychological symptoms (P < 0.001). The same trend was observed for both male and female students.
CONCLUSIONS: Chinese university students have a certain proportion of psychological symptom problems, and there is a significant between MVPA and screen time and psychological symptoms, and the same trend exists for both male and female students. Chinese university students should perform MVPA for not less than 60 min a day, and at the same time control the duration of screen time, and screen time should be controlled between 1 and 2 h a day, which has a better promotion effect on psychological health.
METHODS: This study investigated physical activity, screen time, and psychological symptoms in 11,173 university students aged 19-22 years in six regions of China. A binary logistic regression analysis was used to analyze the association between moderate-to-vigorous physical activity (MVPA) and screen time and psychological symptoms. And the generalize linear model (GLM) analysis was used to further analyze the association between MVPA and screen time and psychological symptoms.
RESULTS: The detection rate of psychological symptoms among Chinese university students was 16.3%, with a higher percentage of female students (17.5%) than male students (14.7%). The proportion of male students (8.2%) with MVPA > 60 min/d was higher than that of female students (2.3%), and the proportion of male students (33.8%) and female students (34.5%) with screen time > 2 h/d was basically the same. The generalize linear model (GLM) analysis showed that university students with MVPA < 30 min/d and screen time > 2 h/d (OR = 1.59, 95% CI: 1.10-2.31) had the highest risk of psychological symptoms (OR = 1.59, 95% CI: 1.10-2.31) compared to university students with MVPA > 60 min/d and screen time < 1 h/d as the reference group. The risk of psychological symptoms was the highest among those with MVPA < 30 min/d and screen time > 2 h/d (OR = 1.59,95% CI: 1.10-2.31). In addition, university students with MVPA > 60 min/d and a screen time of 1-2 h/d (OR = 0.09, 95% CI: 0.03-0.25) had the lowest risk of psychological symptoms (P < 0.001). The same trend was observed for both male and female students.
CONCLUSIONS: Chinese university students have a certain proportion of psychological symptom problems, and there is a significant between MVPA and screen time and psychological symptoms, and the same trend exists for both male and female students. Chinese university students should perform MVPA for not less than 60 min a day, and at the same time control the duration of screen time, and screen time should be controlled between 1 and 2 h a day, which has a better promotion effect on psychological health.
摘要：
背景：中国青少年的体力活动下降和屏幕时间（ST）增加已成为学者们共同关注的主要问题，同时心理健康问题也在上升。先前的研究已经证实了身体活动与屏幕时间和心理症状之间的关联，但目前还不清楚他们的心理症状，特别是对于有高比例心理症状的中国大学生，没有研究证据。
方法：这项研究调查了身体活动，屏幕时间,中国六个地区的11,173名19-22岁大学生的心理症状。采用二元logistic回归分析中、剧烈体力活动(MVPA)与筛查时间和心理症状的关系。并采用广义线性模型(GLM)分析进一步分析MVPA与筛查时间和心理症状的关联。
结果:中国大学生心理症状检出率为16.3%,女生比例(17.5%)高于男生比例(14.7%)。MVPA>60min/d的男生比例(8.2%)高于女生(2.3%),屏幕时间>2h/d的男生（33.8％）和女生（34.5％）的比例基本相同。广义线性模型(GLM)分析表明,与MVPA>60min/d、屏幕时间<1h/d的大学生作为参照组相比,MVPA<30min/d、屏幕时间>2h/d(OR=1.59,95%CI:1.10-2.31)的大学生出现心理症状的风险最高(OR=1.59,95%CI:1.10-2.31)。在MVPA<30min/d和屏幕时间>2h/d的人群中，出现心理症状的风险最高（OR=1.59，95％CI：1.10-2.31）。此外,MVPA>60min/d且筛查时间为1-2h/d（OR=0.09，95％CI：0.03-0.25）的大学生发生心理症状的风险最低（P<0.001）。男女学生也有同样的趋势。
结论:中国大学生存在一定比例的心理症状问题,MVPA与屏幕时间和心理症状之间存在显着差异，男女学生也存在同样的趋势。中国大学生每天应执行MVPA不少于60分钟，同时控制屏幕时间的持续时间，屏幕时间应控制在每天1到2小时之间，对心理健康有较好的促进作用。
方法：这项研究调查了身体活动，屏幕时间,中国六个地区的11,173名19-22岁大学生的心理症状。采用二元logistic回归分析中、剧烈体力活动(MVPA)与筛查时间和心理症状的关系。并采用广义线性模型(GLM)分析进一步分析MVPA与筛查时间和心理症状的关联。
结果:中国大学生心理症状检出率为16.3%,女生比例(17.5%)高于男生比例(14.7%)。MVPA>60min/d的男生比例(8.2%)高于女生(2.3%),屏幕时间>2h/d的男生（33.8％）和女生（34.5％）的比例基本相同。广义线性模型(GLM)分析表明,与MVPA>60min/d、屏幕时间<1h/d的大学生作为参照组相比,MVPA<30min/d、屏幕时间>2h/d(OR=1.59,95%CI:1.10-2.31)的大学生出现心理症状的风险最高(OR=1.59,95%CI:1.10-2.31)。在MVPA<30min/d和屏幕时间>2h/d的人群中，出现心理症状的风险最高（OR=1.59，95％CI：1.10-2.31）。此外,MVPA>60min/d且筛查时间为1-2h/d（OR=0.09，95％CI：0.03-0.25）的大学生发生心理症状的风险最低（P<0.001）。男女学生也有同样的趋势。
结论:中国大学生存在一定比例的心理症状问题,MVPA与屏幕时间和心理症状之间存在显着差异，男女学生也存在同样的趋势。中国大学生每天应执行MVPA不少于60分钟，同时控制屏幕时间的持续时间，屏幕时间应控制在每天1到2小时之间，对心理健康有较好的促进作用。
