Correlation of objective mobile phone use time and mobile phone addiction with depressive and anxiety symptoms in young adults

Figure 1 Restricted cubic splines regression analysis of mobile phone use time and mobile phone addiction with depressive and anxiety symptoms. A: Mobile phone use time and depressive symptoms; B: Mobile phone use time and anxiety symptoms; C: Mobile phone addiction and depressive symptoms; D: Mobile phone addiction and anxiety symptoms. Odds ratio and confidence interval indicate hazard ratio and confidence interval. In each plot, the solid line indicates how risk of depressive symptoms and anxiety symptoms varies as a function of mobile phone use time and Mobile Phone Addiction Tendency Scale score, while the dashed lines are confidence intervals. All results were adjusted for demographic information (gender, grade, race, registered permanent residence, siblings, and parental educational attainment), negative life events (family disasters, hospitalization experiences, failed exams, and failed relationships), and health-related lifestyles (current smoking, current drinking, physical activity, and rational diet). OR: Odds ratio; CI: Confidence interval; MPATS: Mobile Phone Addiction Tendency Scale.