منابع مشابه
Oral contraceptive use and risk of breast carcinoma in situ.
There is some indication that oral contraceptive use may be associated with a small increase in risk of invasive breast cancer; however, oral contraceptive use in relation to breast carcinoma in situ (BCIS) has rarely been studied. We investigated oral contraceptive use in relation to risk of BCIS in a large population-based case-control study. Female residents of Wisconsin, Massachusetts, and ...
متن کاملBRCA1 and BRCA2 mutation carriers, oral contraceptive use, and breast cancer before age 50.
BACKGROUND Understanding the effect of oral contraceptives on risk of breast cancer in BRCA1 or BRCA2 mutation carriers is important because oral contraceptive use is a common, modifiable practice. METHODS We studied 497 BRCA1 and 307 BRCA2 mutation carriers, of whom 195 and 128, respectively, had been diagnosed with breast cancer. Case-control analyses were conducted using unconditional logi...
متن کاملReproductive history and oral contraceptive use in relation to risk of triple-negative breast cancer.
BACKGROUND Triple-negative (ie, estrogen receptor [ER], progesterone receptor, and HER2 negative) breast cancer occurs disproportionately among African American women compared with white women and is associated with a worse prognosis than ER-positive (ER+) breast cancer. Hormonally mediated risk factors may be differentially related to risk of triple-negative and ER+ breast cancers. METHODS U...
متن کاملCase-control study of oral contraceptive use and risk of breast cancer.
The relation of oral contraceptive use to the risk of breast cancer in white women aged 25-59 years was assessed with data collected during 1977-1992 in a case-control surveillance system in hospitals in Boston, New York, and Philadelphia. A total of 3,540 cases with breast cancer were compared with 4,488 controls with nonmalignant nongynecologic conditions unrelated to oral contraceptive use. ...
متن کاملOral contraceptive use before first birth and risk of breast cancer: a case control study
BACKGROUND: The aim of this study was first, to investigate whether women starting oral contraceptive (OC) use at a young age and before first birth have an increased risk for breast cancer and second, to report difficulties encountered in studying long-term health impacts of medical technologies. METHODS: Breast cancers occurring up until 1997 among 37153 Helsinki students born between 1946 an...
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ژورنال
عنوان ژورنال: British Journal of Cancer
سال: 1987
ISSN: 0007-0920,1532-1827
DOI: 10.1038/bjc.1987.272