Villoresi G, Ptitsyna N G, Tiasto M I, Iucci N
Dipartimento di Fisica E. Amaldi, Università degli Studi Roma Tre, Italy.
Biofizika. 1998 Jul-Aug;43(4):623-31.
Relationships between different parameters of the geomagnetic activity and medical statistical data on myocardial infarction were investigated anew, because previous results in this field have been often inconsistent. The data are daily numbers of myocardial infarction incidence rates (15,543 cases) and number of deaths for infarction (3,065 cases), abstracted from registries of the 14 biggest hospitals of St. Petersburg (1989-1990). The analysis showed a statistically significant increase in myocardial infarction rate during big geomagnetic disturbances, defined by the days of the descending phase of cosmic ray Forbush decreases. An overall estimation of the average increase in infarction incidence rate during big geomagnetic storms, (10.5 +/- 1.2)%, has been computed by taking into account previous results [1-3]. In contrast, morbidity data did not show any significant correlation with geomagnetic disturbances. It was found also that the infarction incidence rate appears to be rather constant from Monday to Friday and to decrease sharply by a factor approximately 1.25 on Saturday-Sunday and mid-week festivities. This effect is associated with different exposure during work days and week-ends to man-made magnetic field environment mainly produced by electrified transport. Such effect was not observed in mortality data. The results and their methodological aspects are placed in the context of studies on possible health effects of low frequency magnetic fields both natural and man-made origin.
由于该领域之前的研究结果常常不一致，因此重新研究了地磁活动的不同参数与心肌梗死医学统计数据之间的关系。数据来自圣彼得堡14家最大医院的登记处（1989 - 1990年），包括心肌梗死发病率的每日病例数（15543例）和梗死死亡人数（3065例）。分析表明，在由宇宙射线福布斯下降期的日子所定义的大地磁扰动期间，心肌梗死发生率有统计学意义的增加。考虑到之前的研究结果[1 - 3]，已计算出大地磁暴期间梗死发病率平均增加的总体估计值为(10.5±1.2)%。相比之下，发病率数据与地磁扰动没有显示出任何显著相关性。还发现，心肌梗死发病率从周一到周五似乎相当稳定，而在周六至周日以及周中节日期间急剧下降，下降系数约为1.25。这种效应与工作日和周末期间暴露于主要由电气化交通产生的人为磁场环境的差异有关。在死亡率数据中未观察到这种效应。这些结果及其方法学方面是在对自然和人为来源的低频磁场可能对健康产生的影响的研究背景下进行阐述的。
