Nishi M, Miyake H, Okamoto H, Goto Y, Sakai T
Department of Public Health, Sapporo Medical University, Hokkaido, Japan.
J Epidemiol. 2000 Sep;10(5):317-20. doi: 10.2188/jea.10.317.
Employing the vital statistics from January 1, 1979 to December 31, 1994 in Hokkaido Prefecture, Japan, we investigated the relationship between suicide (ICD 9 code, El15) and days of the week. In one day 1.97 males and 0.98 females committed suicide on average. On Saturdays the number of suicides per day was the smallest. On Mondays it was the highest. When the days were classified into (1) a holiday, (2) the day before a holiday, (3) the day after a holiday (4) the day both before and after a holiday and (5) others, the rate of suicide was the lowest in the days before a holiday. In the days after a holiday, however, the rate was the highest. The same tendency was also noted when the subjects were classified into several subgroups from the viewpoint of ages, seasons or calendar years. The time relation of holidays seemed to have something to do with the intention to commit suicide.
利用日本北海道地区1979年1月1日至1994年12月31日的人口动态统计数据，我们调查了自杀（国际疾病分类第九版代码，E115）与星期几之间的关系。平均每天有1.97名男性和0.98名女性自杀。周六的每日自杀人数最少。周一的自杀人数最多。当将日期分为（1）节假日、（2）节假日的前一天、（3）节假日的后一天、（4）节假日前后两天以及（5）其他情况时，节假日的前一天自杀率最低。然而，在节假日后的日子里，自杀率最高。从年龄、季节或历年的角度将研究对象分为几个亚组时，也观察到了相同的趋势。节假日的时间关系似乎与自杀意图有关。
