| Objective: The literature has shown that mobile phone addiction is an important risk factor for depressive symptoms.The purpose of this study was to explore the mediating and moderating effects of sleep quality and peer relationships on the association between mobile phone addiction and depressive symptoms among medical students,so as to provide theoretical support for intervention measures to reduce depressive symptoms among medical students.Method: A sample of 450 medical students were recruited to complete measures of mobile phone addiction,depressive symptoms,sleep quality and peer relationships.First,all the items in the scale were scored and summarized respectively.T-test and ANOVA were used to test group differences of demographic variables and mobile phone usage.Next,Pearson correlation was used to test the bivariate correlation of all the study variables.Finally,we used the SPSS macro PROCESS proposed by Hayes to test the proposed model.Results:1.Whether the only child(P< 0.001),family income per month(P<0.01),family area(P< 0.01),time spent on the phone every day(P< 0.001)were important factors in depressive symptoms of medical students.2.Depressive symptoms of medical students were positively correlated with mobile phone addiction(r=0.37,P <0.01)and poor sleep quality(r=0.62,P < 0.01),and negatively correlated with peer relationships(r=-0.37,P < 0.01).Mobile phone addiction was positively correlated with poor sleep quality(r=0.27,P < 0.01)and negatively correlated with peer relationships(r=-0.14,P < 0.01).Poor sleep quality was negatively correlated with peer relationships(r=-0.24,P < 0.01).3.Mobile phone addiction had a significant predictive effect on depressive symptoms(β=0.34,P < 0.001),mobile phone addiction had a significant positive predictive effect on poor sleep quality(β=0.23,P < 0.001),and poor sleep quality also had a significant positive predictive effect on depressive symptoms(β=0.49,P < 0.001).Therefore,sleep quality may play a partial mediating role between mobile phone addiction and depressive symptoms.4.The interaction between poor sleep quality and peer relationships was a significant predictor of depressive symptoms(β=-0.11,P < 0.01),suggesting that peer relationships could modulate the predictive effect of poor sleep quality on depression.Conclusion:1.In this study,medical students who are not the only child,have low monthly family income,live in rural areas,and use mobile phones for a long time every day are more likely to have depressive symptoms.2.In this study,there is a positive correlation between mobile phone addiction and depressive symptoms in medical students.There is a positive correlation between poor sleep quality and depressive symptoms.And there is a negative correlation between peer relationship and depressive symptoms.3.Sleep quality plays a partial mediating role between mobile phone addiction and depressive symptoms of medical students in this study.4.The peer relationships of medical students moderated the mediating effect of sleep quality on depressive symptoms. |
