Effect of mobile phone addiction on sleep quality in patients aged 18–45 years with acute myocardial infarction: a chain mediation analysis of coping style, anxiety, and depression

Rising acute myocardial infarction (AMI) incidence in young adults coincides with increased mobile phone addictione, which has been connected to poor sleep quality. However, mechanisms linking mobile overuse to sleep disturbances, particularly the mediating roles of coping styles and psychological distress, remain underexplored. This study investigated the association between mobile phone addictione and sleep quality in AMI patients aged 18–45 years, examining coping styles, anxiety, and depression as potential mediators. In this study, a cross-sectional study (January 2023–January 2025) enrolled 125 patients via convenience sampling. The results showed that mobile phone addiction is positively associated with poor sleep in young patients with AMI, which may be related to coping styles and symptoms of anxiety/depression. Holistic interventions addressing digital habits, mental health, and coping strategies may improve the sleep quality in this population.