Hiltunen Laura, Haukka Jari, Ruuhela Reija, Suominen Kirsi, Partonen Timo
Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Mannerheimintie 166, P.O. Box 30, 00271, Helsinki, Finland,
Environ Health Prev Med. 2014 Jul;19(4):286-94. doi: 10.1007/s12199-014-0391-9. Epub 2014 May 3.
Suicide peaks in late spring and October are still seen in Finland among many countries. Weather factors have been suggested as explanations for these peaks, although with inconsistent results. Since the exact timing of these peaks varies each year, the length of daylight and changes in it seem inadequate as an explanation. We hypothesized that ambient temperature and the timing of thermal seasons might associate with suicide rate.
Suicide rates from three areas across Finland (N = 10,802) were analyzed with Poisson regression in six different models against variables calculated from the local ambient daily temperature, diurnal temperature range, and the duration from the onset of thermal seasons. Separate models for men and women were constructed.
The temperature change over 5 days associated with the suicide rate of men in Helsinki region, or in other words, the lower the suicide rate was, the higher the temperature decrease had been. For women, the results were more inconsistent.
Our study is in line with some earlier studies which imply that impairment of thermoregulation might exist among suicide victims.
在许多国家中，芬兰仍可见到自杀率在春末和10月出现高峰。尽管结果并不一致，但天气因素已被提出作为这些高峰的解释。由于这些高峰的确切时间每年都有所不同，日照时长及其变化似乎不足以作为解释。我们假设环境温度和热季时间可能与自杀率相关。
在六个不同模型中，采用泊松回归分析了芬兰三个地区（N = 10802）的自杀率，这些模型针对根据当地每日环境温度、昼夜温差以及热季开始后的持续时间计算得出的变量。构建了男性和女性的单独模型。
赫尔辛基地区男性的自杀率与5天内的温度变化相关，换言之，自杀率越低，温度下降幅度越大。对于女性，结果则更为不一致。
我们的研究与一些早期研究一致，这些研究表明自杀受害者可能存在体温调节障碍。
