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一些出生缺陷有再发倾向已众所周知,但再发危险性的估计大多数是来自于临床病例研究。本研究利用挪威人口集中登记资料来估计出生缺陷再发危险性,并且检查了当母亲于第一次、第二次妊娠之间换了配偶或更换了居住城市时是否影响再发的危险性。
It is well known that some birth defects have a secondary tendency, but most of the estimates of the risk of recurrence are from clinical case studies. This study used the Norwegian population concentration registration data to estimate the risk of recurrence of birth defects and examined whether the risk of recurrence was affected when the mother changed her spouse between the first and second pregnancies or changed her home city.