Postmenopausal Estrogen Use and Invasive versus in situ Breast Cancer Risk

To examine the effect of cancer histopathology on the relationship between estrogen-replacement therapy (ERT) use and breast cancer risk, we performed a case-control study of 109 postmenopausal women 45 years or older with in situ or invasive breast cancer matched to 545 controls. When in situ and i...

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Veröffentlicht in:Journal of clinical epidemiology 1998-12, Vol.51 (12), p.1277-1283
Hauptverfasser: Henrich, Janet B., Kornguth, Phyllis J., Viscoli, Catherine M., Horwitz, Ralph I.
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container_end_page 1283
container_issue 12
container_start_page 1277
container_title Journal of clinical epidemiology
container_volume 51
creator Henrich, Janet B.
Kornguth, Phyllis J.
Viscoli, Catherine M.
Horwitz, Ralph I.
description To examine the effect of cancer histopathology on the relationship between estrogen-replacement therapy (ERT) use and breast cancer risk, we performed a case-control study of 109 postmenopausal women 45 years or older with in situ or invasive breast cancer matched to 545 controls. When in situ and invasive tumors were combined, the overall odds ratio (OR) describing the association between ERT use and breast cancer risk was not statistically significantly elevated (adjusted OR = 1.48, 95% confidence interval [CI] = 0.89–2.47). When the analyses were confined to women with invasive disease, risk estimates were uniformly higher (adjusted OR = 1.85, 95% CI = 1.00–3.45). In contrast, the overall estimate for the relationship between ERT use and in situ breast cancer was close to 1 (adjusted OR = 1.08, 95% CI = 0.42–2.77). The positive association between ERT use and invasive breast cancer we observed, and the lack of association in women with in situ disease, may represent a distinct biological difference or may be related to the small sample size of our study.
doi_str_mv 10.1016/S0895-4356(98)00116-4
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subjects Aged
Aged, 80 and over
Biological and medical sciences
breast cancer
Breast Neoplasms - diagnosis
Breast Neoplasms - epidemiology
Breast Neoplasms - pathology
Carcinoma in Situ - diagnosis
Carcinoma in Situ - epidemiology
Carcinoma in Situ - pathology
Case-Control Studies
clinical epidemiology
Drug toxicity and drugs side effects treatment
estrogen replacement therapy
Estrogen Replacement Therapy - adverse effects
Female
Humans
Logistic Models
Mammography
Medical sciences
Middle Aged
Neoplasm Invasiveness - diagnosis
Neoplasm Invasiveness - pathology
Odds Ratio
Pharmacology. Drug treatments
Postmenopausal
Postmenopause
Toxicity: urogenital system
title Postmenopausal Estrogen Use and Invasive versus in situ Breast Cancer Risk
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