Helweg-Larsen K, Bay H, Mac F
Int J Epidemiol. 1985 Dec;14(4):566-74. doi: 10.1093/ije/14.4.566.
Sudden Infant Death Syndrome (SIDS) has a characteristic peak incidence in the winter months and a peak incidence at the age of two to four months. The present study examines whether the seasonality is related to the time of birth-the time of death or both. The data for the study relates to 116 cases of SIDS, representing 95% of all registered cases of SIDS in eastern Denmark in a three-year period 1981 to 1983. They were all autopsied at the Institute of Forensic Medicine in Copenhagen and evaluated by the same people. The framework of the analysis is a multiplicative Poisson-model with three sets of parameters describing the effects of the age of the infant, the time of death and the time of birth. The analysis proved the seasonality related alone to the time of death. An identical analysis was performed for 123 infants who in the period 1973-83 in eastern Denmark died from infectious diseases. In these cases no significant effect of the month of birth or the month of death was shown.
婴儿猝死综合征（SIDS）在冬季有一个特征性的发病高峰，在2至4个月龄时也有一个发病高峰。本研究探讨这种季节性是否与出生时间、死亡时间或两者都有关。该研究的数据涉及116例SIDS病例，占1981年至1983年三年间丹麦东部所有登记的SIDS病例的95%。这些病例均在哥本哈根法医学研究所进行了尸检，并由同一批人员进行评估。分析框架是一个乘法泊松模型，有三组参数描述婴儿年龄、死亡时间和出生时间的影响。分析证明季节性仅与死亡时间有关。对1973年至1983年期间在丹麦东部死于传染病的123名婴儿进行了相同的分析。在这些病例中，未显示出生月份或死亡月份有显著影响。
