| Abstract：Objective To explore the relationship among mobile phone addiction, sleep quality and depression in medical students using structural equation modeling, and examine the mediating role of sleep quality between mobile phone addiction and depression. Methods A total of 2088 college students were randomly selected from a medical college in Xinjiang Uygur Autonomous Region, and a questionnaire survey was conducted using the Mobile Phone Addiction Index (MPAI), Pittsburgh Sleep Quality Index (PSQI), and Self Rating Depression Scale. Results The detection rate of mobile phone addiction among medical students was 30.75%, of which 59.50% (382/642) had sleep quality problems and 60.44%(388/642)had obvious depression. The scores of sleep quality, falling asleep time, sleep disorder, hypnotics,daytime dysfunction, PSQI and depression between the mobile phone addiction group and the non mobile phone addiction group were statistically significant (P<0.05). Correlation analysis shows that there is a positive correlation between mobile phone addiction, total sleep quality score, and depression (r=0.380, 0.415, 0.581, P<0.01 for all).The structural equation model shows that all fitting indicators meet the standards, and mobile phone addiction has a direct positive effect on depression（β=0.34, P<0.05), mobile phone addiction can indirectly affect depression through sleep quality（χ2/df=2.477, RMSEA=0.027, GFI=0.997, AGFI=0.992, NFI=0.996). Conclusions Mobile phone addiction can directly affect depression and indirectly affect depression through sleep quality. |
