Effects Of Screen Time,Physical Activity And Sleep Duration On Quality Of Life And Stress In College Students

Object: We investigate screen time,physical activity,sleep duration,quality of life and stress among undergraduates to explore the associations of screen time,physical activity and sleep duration with quality of life and stress,in a medical university,Shenyang.Methods: In this study,a convenience sampling method was used to select undergraduates from a medical university in Shenyang.Finally,we received 1212 effective questionnaires.The survey tools include: basic information questionnaire,screen time,physical activity,sleep duration,quality of life and stress.The Chinese version of the International Physical Activity Questionnaire was used to evaluate physical activity and sleep duration.The Chinese version of 12-Item Short-Form Health Survey was applied to evaluate quality of life.Stress was evaluated using the Chinese Perceived Stress Scale.The data analysis was performed by SPSS 20.0.Associations of screen time,physical activity and sleep duration with quality of life and stress were analyzed using multivariate linear regression and binary logistic regression.Result: After adjustment for sex,age,grade,BMI,specialty,home location and monthly living expenses,multiple linear regression analysis showed that students who reported moderate and high physical activity had significantly higher physical component summary score than those who reported low physical activity(β=1.999,P=0.008;β=2.313,P=0.002).And students who slept for <7h/d had significantly lower mental component summary score than those who slept for 7-9h/d(β=-3.049,P=0.011).In further sex analysis,males who slept for >9h/d had significantly higher mental component summary score than those who slept for 7-9h/d(β=3.221,P=0.018).Females who reported moderate and high physical activity had significantly higher physical component summary score than those who reported low physical activity(β=2.860,P=0.002;β=3.669,P<0.001).And females who slept for <7h/d had significantly lower mental component summary score than those who slept for 7-9h/d(β=-4.376,P=0.006).Logistic regression results showed that students whose screen time was >6h/d had significantly higher stress than those whose screen time was ≤6h/d(OR=1.36,95 % CI:1.06-1.75).Students with moderate and high physical activity had lower stress than thosewith low physical activity(OR=0.51,95% CI: 0.35-0.75;OR=0.43,95% CI: 0.29-0.63).And students who slept for <7h/d had significantly higher stress than those who slept for7-9h/d(OR=1.77,95 % CI: 1.06-2.93).In further sex analysis,females whose screen time was >6h/d had significantly higher stress than those whose screen time was ≤6h/d(OR=1.57,95 % CI: 1.15-2.16).Females with moderate and high physical activity had lower stress than those with low physical activity(OR=0.46,95% CI: 0.29-0.73;OR=0.34,95% CI: 0.21-0.54).While no significant difference was observed in males.Conclusions: Sufficient physical activity can promote physical health of college students,while short sleep duration(<7h/d)can lead to poor mental health of college students.In addition,adequate physical activity can relieve stress in college students.However,high screen time(>6h/d)and short sleep duration(<7h/d)can increase stress in college students.