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Role of reproductive factors on the risk of endometrial cancer
Author(s) -
Parazzini Fabio,
Negri Eva,
La Vecchia Carlo,
Benzi Guido,
Chiaffarino Francesca,
Polatti Anna,
Franceschi Silvia
Publication year - 1998
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/(sici)1097-0215(19980610)76:6<784::aid-ijc2>3.0.co;2-u
Subject(s) - endometrial cancer , medicine , obstetrics , gynecology , odds ratio , abortion , pregnancy , cancer , case control study , biology , genetics
We analyzed the role of reproductive factors on the risk of endometrial cancer using data from a case‐control study conducted in Italy. Cases were 752 women with histologically confirmed endometrial cancer <75 years of age. Controls were 2,606 patients <75 years of age admitted for acute, non‐gynecological non‐hormone‐related, non‐neoplastic conditions to the same network of hospitals where cases had been identified. In comparison with nulliparae, the risk of endometrial cancer tended to be lower in parous women, and the estimated multivariate odds ratios (ORs) were 0.9, 0.8 and 0.7, respectively, for women reporting 1, 2 and 3 or more births (χ 1 2 trend 10.21). In comparison with women reporting no induced abortion, the ORs of endometrial cancer were 0.6 in women reporting 1 and 0.4 in those reporting 2 or more induced abortions. When considering parous women only, in comparison with women reporting their last birth 20 years before or longer, the ORs of endometrial cancer were 0.6 in those reporting their last birth 10–19 years before and 0.3 in those reporting their last birth <10 years before. Our results confirm and further quantify a protective role of pregnancy on the risk of endometrial cancer and provide insights on the time‐risk relationship between pregnancy and cancer of corpus uteri. Int. J. Cancer 76:784–786, 1998.© 1998 Wiley‐Liss, Inc.