This study examined how lifestyle risk behaviors mediate the relationship between smartphone overdependence, depressive symptoms, and suicidal behavior in adolescents. Based on a secondary analysis of national survey data obtained in 2020 in South Korea, this study had 54,948 participating adolescents. Multiple logistic regression and mediating effect analyses were used to assess the relationships between the study variables. Adolescents’ lifestyle risk behaviors partially mediated the link between smartphone overdependence and depression (Z = 6.86, < .001), suicidal ideation (Z = 7.04, < .001), and suicidal planning (Z = 4.59, < .001). This is the first study to examine the mediating role of comprehensive lifestyle behaviors, not single habits, in the relationship between smartphone overdependence, depression, and suicidal behaviors. Encouraging healthy lifestyle behaviors in adolescents can help alleviate the link between smartphone overdependence and mental health problems.

中文翻译：

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通过韩国青少年生活方式风险行为的中介效应探索智能手机过度依赖、抑郁和自杀行为之间的联系：利用国家大数据的横断面研究

这项研究探讨了生活方式风险行为如何调节青少年智能手机过度依赖、抑郁症状和自杀行为之间的关系。根据对韩国 2020 年获得的全国调查数据进行二次分析，这项研究有 54,948 名青少年参与。使用多元逻辑回归和中介效应分析来评估研究变量之间的关系。青少年的生活方式风险行为部分介导了智能手机过度依赖与抑郁症 (Z = 6.86, < .001)、自杀意念 (Z = 7.04, < .001) 和自杀计划 (Z = 4.59, < .001) 之间的联系。这是第一项研究综合生活方式行为（而非单一习惯）在智能手机过度依赖、抑郁和自杀行为之间关系中的中介作用的研究。鼓励青少年健康的生活方式行为有助于减轻智能手机过度依赖与心理健康问题之间的联系。