Cox B, Skegg K
University of Otago Medical School, Dunedin, New Zealand.
J Epidemiol Community Health. 1993 Feb;47(1):69-72. doi: 10.1136/jech.47.1.69.
The aim was to determine whether clustering of suicide occurred in prisoners and detainees in police cells and to describe the characteristics of any clusters identified.
Mortality from suicide was examined for evidence of clusters.
Prisons (1971-1988) and police cells (1980-September 1991) in New Zealand.
82 male suicides.
There were 38 male suicides in prisons and 44 in police cells over the time periods. Due to the increasing trend in prison suicides, the 1971-1982 and 1983-1988 time periods were examined for evidence of clusters separately. For suicides in police cells the time periods studied were 1980-1982, 1983-1988, and 1989-1991. The event of suicide was treated as a Poisson process with all suicides in a time period used to calculate the mean. Four suicide clusters occurred between 1985 and 1988 in prisons. These did not explain the increased suicide rate over this period. Three clusters of suicide in police cells occurred between 1980 and 1991, which had different characteristics from suicide in prisons in that these three clusters were of longer duration.
The different characteristics of prison and police cell clusters of suicide indicated separate transmission of the contagious component of suicide between these groups. Distinct strategies to reduce clusters of male suicide in custody are required for prisoners and those held in police cells.
旨在确定监狱及警察拘留所中的囚犯和被拘留者是否存在自杀聚集现象，并描述所识别出的任何聚集现象的特征。
对自杀死亡率进行检查以寻找聚集现象的证据。
新西兰的监狱（1971 - 1988年）和警察拘留所（1980年 - 1991年9月）。
82例男性自杀案例。
在上述时间段内，监狱中有38例男性自杀，警察拘留所有44例。由于监狱自杀呈上升趋势，因此分别对1971 - 1982年和1983 - 1988年这两个时间段进行聚集现象证据的检查。对于警察拘留所中的自杀案例，研究时间段为1980 - 1982年、1983 - 1988年和1989 - 1991年。将自杀事件视为泊松过程，用一个时间段内的所有自杀案例来计算均值。1985年至1988年期间监狱中出现了4起自杀聚集现象。但这些并不能解释该时间段内自杀率上升的原因。1980年至1991年期间警察拘留所出现了3起自杀聚集现象，其特征与监狱自杀不同，这3起聚集现象持续时间更长。
监狱和警察拘留所自杀聚集现象的不同特征表明自杀传染性因素在这些群体之间存在不同的传播方式。对于囚犯和被关押在警察拘留所的人，需要采取不同策略来减少男性在押期间的自杀聚集现象。
