Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
PLoS One. 2012;7(9):e45736. doi: 10.1371/journal.pone.0045736. Epub 2012 Sep 19.
A number of studies have tried to identify risk factors for being involved in bullying in order to help developing preventive measures; however, to our knowledge, no study has investigated the effect of nocturnal lifestyle behavior such as sleep pattern or cellular phone usage. In the present study, we aimed to investigate the relationship between school bullying and sleep pattern or nocturnal cellular phone usage in adolescents. The effect of school size on school bullying was also examined.
Data from the cross-sectional survey of psychopathologies conducted for 19,436 Japanese students from 45 public junior high schools (7(th)-9(th) grade) and 28 senior high schools (10(th)-12(th) grade) were analyzed.
Bullying status was significantly associated with irregular bedtime (OR = 1.23 and 1.41 for pure bullies and bully-victims, respectively) and e-mail exchange or calling after lights-out (OR = 1.53 and 1.31 for pure bullies and bully-victims, respectively) after controlling domestic violence and substance usage. In addition, school size was significantly associated with the increased risk of bullying in junior high school students (OR = 1.13 for bully-victims).
The present results suggested that sleep pattern and nocturnal cellular phone usage might be risk factors for being involved in school bullying in adolescents. Although further accumulation of data is needed, progressive trend towards nocturnal lifestyle and increasing usage of cellular phone might impair the well-being of adolescents. School-based interventions for lifestyle including sleep pattern and cellular phone usage may be encouraged to reduce school bullying.
许多研究试图确定参与欺凌的风险因素，以便帮助制定预防措施；然而，据我们所知，没有研究调查过夜间生活方式行为（如睡眠模式或手机使用）对欺凌的影响。在本研究中，我们旨在调查青少年中欺凌与睡眠模式或夜间手机使用之间的关系。还检查了学校规模对学校欺凌的影响。
对来自 45 所公立初中（7 至 9 年级）和 28 所高中（10 至 12 年级）的 19436 名日本学生进行的精神病理学横断面调查的数据进行了分析。
在控制家庭暴力和药物使用后，欺凌状态与不规则的就寝时间（纯欺凌者和欺凌受害者分别为 1.23 和 1.41）和熄灯后电子邮件交换或打电话（纯欺凌者和欺凌受害者分别为 1.53 和 1.31）显著相关。此外，学校规模与初中生欺凌风险增加显著相关（欺凌受害者为 1.13）。
本研究结果表明，睡眠模式和夜间手机使用可能是青少年参与校园欺凌的风险因素。尽管需要进一步积累数据，但夜间生活方式的渐进趋势和手机使用的增加可能会损害青少年的健康。鼓励以生活方式（包括睡眠模式和手机使用）为基础的学校干预措施，以减少校园欺凌。
