| Literature DB >> 7435486 |
H Jick, A M Walker, R N Watkins, D C D'Ewart, J R Hunter, A Danford, S Madsen, B J Dinan, K J Rothman.
Abstract
The incidence of breast cancer among users and non-users of oral contraceptives (OCs) was determined at Group Health Cooperative of Puget Sound, Seattle, Washington, a health care organization which maintains computer files of diagnoses and outpatient drug use. In women 45 years of age or younger, the incidence was nearly identical in users and non-users. In premenopausal women over 45 years of age, there was a positive association between current OC use and breast cancer, the risk ratio estimates and 90% confidence intervals being 4.0 (1.8-9.0) in women 46-50 years of age and 15.5 (5.2-46) in women 51-55 years of age.Entities:
Keywords: Age Factors; Americas; Breast Cancer; Cancer; Contraception; Contraceptive Methods--side effects; Developed Countries; Diseases; Education; Ethnic Groups; Family Planning; Incidence; Mammary Gland Effects; Measurement; Menarche; Menopause; Neoplasms; North America; Northern America; Oral Contraceptives--side effects; Research Methodology; United States; Washington
Mesh：
Substances：
Year: 1980 PMID： 7435486 DOI： 10.1093/oxfordjournals.aje.a113030
Source DB: PubMed Journal: Am J Epidemiol ISSN： 0002-9262 Impact factor: 4.897