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已确认的妇女发生乳腺癌的有关因素包括有否生育、初产年龄、初潮年龄、绝经年龄等。早期研究认为孕期雌激素水平明显影响乳腺癌的发生。本文评价与乳腺癌有关的几项内容,如妊娠年龄、新生期黄疸。调查了死于乳腺癌的双胞胎成员作为预测变量,另外将乳腺癌的发生作为可选择变量。 采用1874年至1961年间瑞典5所医院全部的分娩记录,对众多妇女进行研究,其中乳腺癌患者在1958年至1994年的国家癌症登记处和Uppsala地区癌症登记中也有记录。对1068例已患乳腺癌的妇女和
Confirmed factors related to breast cancer in women include fertility, age at first birth, age at menarche, and age at menopause. Early studies suggest that estrogen levels during pregnancy significantly affect the occurrence of breast cancer. This article evaluates several items related to breast cancer, such as gestational age and neonatal jaundice. The twins who died of breast cancer were investigated as predictors and the occurrence of breast cancer as a selectable variable. All women from five hospitals in Sweden recorded their deliveries from 1874 to 1961, and a large number of women were studied. Among them, breast cancer patients were also registered in the National Cancer Registry from 1958 to 1994 and the Uppsala Regional Cancer Registry. For 1068 women who have breast cancer and