THE ASSOCIATION BETWEEN RISK OF BREAST-CANCER AND AGE AT 1ST PREGNANCY AND PARITY IN MARIBO COUNTY, DENMARK

被引:3
|
作者
MELLEMGAARD, A
EWERTZ, M
LYNGE, E
机构
[1] Danish Cancer Registry, Institute of Cancer Epidemiology, Danish Cancer Society, Copenhagen
关键词
Age at first pregnancy; Breast cancer; Parity; Reproductive factors;
D O I
10.3109/02841869009092987
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The effect of age at first pregnancy and number of pregnancies was examined in a cohort of 14421 women where reproductive informations were collected as part of a cervical cancer screening program. A total of 352 cases occurred in the cohort. In subgroups of women defined by age at first pregnancy the relative risk of breast cancer was lower among women who were first pregnant before 25 years of age (RR = 0.85 vs 1.20). In subgroups of women defined by parity the relative risk decreased with increasing number of pregnancies from about unity among women with 0-3 pregnancies to 0.7 among women with 6 or more pregnancies. ©1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.
引用
收藏
页码:705 / 708
页数:4
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