Näyhä S
Acta Psychiatr Scand. 1983 Jan;67(1):32-42. doi: 10.1111/j.1600-0447.1983.tb00328.x.
The seasonal variation in suicides in Finland is examined by marital status using the individual records for all suicides committed in 1961-1976 and periodic regression analysis. Suicides were usually most frequent in spring or summer, but there was an exceptional secondary concentration of suicides in the autumn period among married and widowed females, which makes the monthly pattern bimodal. Suicides among divorced and widowed males aged 15-44 years showed a unimodal variation with the peak in autumn. While an influence from certain social factors might be entertained, the reasons for the seasonal variation in suicides in general and for this anomalous bimodality in particular remain unknown.
利用1961年至1976年期间所有自杀案例的个人记录和周期性回归分析，按婚姻状况对芬兰自杀情况的季节性变化进行了研究。自杀情况通常在春季或夏季最为频繁，但已婚和丧偶女性在秋季出现了异常的二次自杀集中情况，这使得月度模式呈现双峰态。15至44岁的离婚和丧偶男性的自杀情况呈现单峰变化，秋季达到峰值。虽然可能存在某些社会因素的影响，但总体上自杀季节性变化的原因，尤其是这种异常双峰态的原因仍然未知。
