Gould M S, Wallenstein S, Kleinman M
Department of Psychiatry, College of Physicians & Surgeons, Columbia University, New York, NY 10032.
Am J Epidemiol. 1990 Jan;131(1):71-8. doi: 10.1093/oxfordjournals.aje.a115487.
The occurrence of time-space clusters was examined in national mortality data on suicide among adolescents aged 15-19 years obtained from the National Center for Health Statistics Mortality Detail Files for 1978-1984. The analyses indicated that overall significant time-space clustering occurred among 15-19 year olds. The authors thus believe that they have documented for the first time that outbreaks of suicide occur more frequently than expected by chance alone. The occurrence of suicide clusters among teenagers appeared to vary considerably by state and year of investigation. There is some indication that there has been an increase in teenage clusters in more recent years.
利用从国家卫生统计中心1978 - 1984年死亡率明细档案中获取的15至19岁青少年自杀的全国死亡率数据，对时空聚集现象进行了研究。分析表明，15至19岁青少年中总体上存在显著的时空聚集现象。因此，作者认为他们首次记录到自杀爆发的发生频率高于仅由偶然因素预期的频率。青少年自杀聚集现象的发生在不同州以及不同调查年份似乎有很大差异。有迹象表明，近年来青少年自杀聚集现象有所增加。
