Translational Research Center, Kyoto University Hospital, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
Environ Health Prev Med. 2014 Jan;19(1):64-71. doi: 10.1007/s12199-013-0355-5. Epub 2013 Sep 5.
Previous studies have shown a positive relationship between geomagnetic disturbances and an increased incidence of suicide. The Japanese suicide rate is the ninth highest in the world, but there have been no reports examining the relationship between geomagnetic disturbance and the number of suicides, and, therefore, this paper examines this relationship.
The number of Japanese suicides per month from January 1999 to December 2010 was obtained, and it was found that a total of 262,596 males and 102,539 females committed suicide during this period. To adjust the other factors which affect the number of suicides, a multiple linear regression analysis with backward elimination was carried out, with the monthly number of suicides as the response variable and the monthly mean K index value, monthly mean number of sunspots, monthly mean unemployment rate, proportion of elderly people (%), monthly mean air pressure (hPa), monthly mean air temperature (°C), monthly mean humidity (%), and monthly mean day length (h) as the explanatory variables.
In the multiple linear regression analysis for males, the monthly mean K index value was associated with the monthly number of suicides, but in females, the monthly mean K index value was not associated with the monthly number of suicides.
In this study, we generated a hypothesis that geomagnetic disturbances may trigger male suicides.
先前的研究表明，地磁扰动与自杀发生率的增加之间存在正相关关系。日本的自杀率在世界上排名第九，但还没有报道研究地磁干扰与自杀人数之间的关系，因此本文对此进行了研究。
我们获取了 1999 年 1 月至 2010 年 12 月期间日本每月的自杀人数，发现在此期间共有 262596 名男性和 102539 名女性自杀。为了调整影响自杀人数的其他因素，我们进行了带有向后消除法的多元线性回归分析，以每月自杀人数作为因变量，每月平均 K 指数值、每月平均太阳黑子数、每月平均失业率、老年人比例（%）、每月平均气压（hPa）、每月平均气温（°C）、每月平均湿度（%）和每月平均日照时间（h）作为解释变量。
在男性的多元线性回归分析中，每月平均 K 指数值与每月自杀人数相关，但在女性中，每月平均 K 指数值与每月自杀人数无关。
在这项研究中，我们提出了一个假设，即地磁扰动可能引发男性自杀。
