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Background: Excessive smartphone usage is a multifaceted phenomenon characterised by various dysfunctional behaviours. Past evidence consistently demonstrated a strong relationship between smartphone addiction and heightened levels of anxiety and social dysfunction among adolescents. Aim: This study aimed to investigate the high rate of smartphone addiction among adolescents in two cities of China: Guangzhou and Wuhan. It also explored the relationship between smartphone addiction and social anxiety, along with the prevalence of smartphone use among Chinese adolescents. Method: A cross-sectional research design using a convenience sampling method was employed to collect data from 670 Chinese middle school adolescents between May and July 2025. Most participants were aged between 13–15 years (55.1%). The statistical data analysis was performed by using SPSS version 20.0. Pearson correlation and regression analysis were employed to explore the relationship among smartphone addiction, anxiety and social adjustments of adolescents. Results: Results underscored a positive correlation between smartphone addiction and anxiety (0.998), smartphone addiction and social interaction anxiety (0.999), and general anxiety. The reliability analysis of the self-administered survey questionnaire showed internal consistency (Cronbach’s α = 0.999). Conclusion: These results emphasise the importance of reducing smartphone consumption among adolescents in order to provide them with a healthier developmental environment. Excessive smartphone use has been linked to increased risks of anxiety, social dysfunction, and physical health problems, which can severely impact adolescents’ overall well-being.
Anxiety, Technology Addiction, Social adjustment, Smartphone, Adolescent, Internet Addiction Disorder