自杀的季节性变化：减弱或消失。来自英格兰和威尔士的经验，1982 - 1996年
Seasonal variation in suicides: diminished or vanished. Experience from England and Wales, 1982-1996.
作者信息
Yip P S, Chao A, Chiu C W
机构信息
Department of Statistics and Actuarial Science, University of Hong Kong, Pokfulam Road, Hong Kong.
出版信息
Br J Psychiatry. 2000 Oct;177:366-9. doi: 10.1192/bjp.177.4.366.
BACKGROUND
Seasonal variation in suicidal death has been observed in many countries. In particular, a cyclic variation was found for both men and women in England and Wales in the 1960s and 1970s. Men showed a single 12-month cycle whereas women showed two cycles.
AIMS
To re-examine the seasonal variation in suicides in England and Wales for the period 1982-1996.
METHOD
A harmonic analysis was used to detect the seasonality of the suicide data.
RESULTS
The seasonal effect on suicide is greatly diminished in England and Wales. This is shown by the reduced amplitude and smaller proportion of variance accounted for by the season.
CONCLUSIONS
The seasonal effect on suicide has either diminished or vanished.
背景
许多国家都观察到自杀死亡存在季节性变化。特别是在20世纪60年代和70年代的英格兰和威尔士，男性和女性都出现了周期性变化。男性呈现出一个12个月的周期，而女性则呈现出两个周期。
目的
重新审视1982年至1996年期间英格兰和威尔士自杀的季节性变化。
方法
采用谐波分析来检测自杀数据的季节性。
结果
在英格兰和威尔士，季节性对自杀的影响大幅减弱。这表现为季节因素所解释的方差幅度减小和比例降低。
结论
季节性对自杀的影响要么已经减弱，要么已经消失。
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