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Breast cancer risk and oral contraceptive use: results from a large case-control study.
Epidemiology. 1991 Sep; 2(5):353-8.E

Abstract

The association between oral contraceptive use and breast cancer risk was examined using data from a case-control study of breast cancer in Long Island, New York. Cases were defined as female residents of Nassau and Suffolk Counties between the ages of 20 and 79, diagnosed with breast cancer between January 1, 1984 and December 31, 1986. Age- and county-matched controls were selected from driver's license files. Among all women under age 70 at diagnosis, there was no association between oral contraceptive use and breast cancer; there was, however, a positive association in the subgroup ages 20-49 (adjusted odds ratio = 1.68, 95% CI: 1.16-2.42). Risk increased with increasing duration of use, but did not differ between women who first used oral contraceptives before the first pregnancy and those who first used them later, or between women who first used oral contraceptives before age 25 and those who first used them at a later age. Risk also appeared to increase with number of years of use before the first pregnancy or before age 25, although numbers were small. History of benign breast disease did not influence risk. The association of breast cancer risk with oral contraceptive use appeared stronger in women from Suffolk County than Nassau County.

Authors+Show Affiliations

New York State Department of Health, Bureau of Cancer Epidemiology, Albany, New York 12237.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

1742384

Citation

Weinstein, A L., et al. "Breast Cancer Risk and Oral Contraceptive Use: Results From a Large Case-control Study." Epidemiology (Cambridge, Mass.), vol. 2, no. 5, 1991, pp. 353-8.
Weinstein AL, Mahoney MC, Nasca PC, et al. Breast cancer risk and oral contraceptive use: results from a large case-control study. Epidemiology. 1991;2(5):353-8.
Weinstein, A. L., Mahoney, M. C., Nasca, P. C., Leske, M. C., & Varma, A. O. (1991). Breast cancer risk and oral contraceptive use: results from a large case-control study. Epidemiology (Cambridge, Mass.), 2(5), 353-8.
Weinstein AL, et al. Breast Cancer Risk and Oral Contraceptive Use: Results From a Large Case-control Study. Epidemiology. 1991;2(5):353-8. PubMed PMID: 1742384.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Breast cancer risk and oral contraceptive use: results from a large case-control study. AU - Weinstein,A L, AU - Mahoney,M C, AU - Nasca,P C, AU - Leske,M C, AU - Varma,A O, PY - 1991/9/1/pubmed PY - 1991/9/1/medline PY - 1991/9/1/entrez KW - Acceptor Characteristics KW - Acceptors KW - Age Factors KW - Americas KW - Bias KW - Biology KW - Breast Cancer KW - Cancer KW - Case Control Studies KW - Contraception KW - Contraception Continuation--statistics KW - Contraceptive Methods--statistics KW - Contraceptive Usage KW - Data Analysis KW - Demographic Factors KW - Developed Countries KW - Diseases KW - Economic Factors KW - Error Sources KW - Family Planning KW - Family Planning Programs KW - Geographic Factors KW - Longterm Effects KW - Measurement KW - Neoplasms KW - New York KW - Nonacceptor Characteristics KW - Nonacceptors KW - North America KW - Northern America KW - Oral Contraceptives--statistics KW - Population KW - Population Characteristics KW - Population Dynamics KW - Research Methodology KW - Risk Factors KW - Sampling Studies KW - Socioeconomic Factors KW - Statistical Regression KW - Studies KW - Surveys KW - Time Factors KW - United States SP - 353 EP - 8 JF - Epidemiology (Cambridge, Mass.) JO - Epidemiology VL - 2 IS - 5 N2 - The association between oral contraceptive use and breast cancer risk was examined using data from a case-control study of breast cancer in Long Island, New York. Cases were defined as female residents of Nassau and Suffolk Counties between the ages of 20 and 79, diagnosed with breast cancer between January 1, 1984 and December 31, 1986. Age- and county-matched controls were selected from driver's license files. Among all women under age 70 at diagnosis, there was no association between oral contraceptive use and breast cancer; there was, however, a positive association in the subgroup ages 20-49 (adjusted odds ratio = 1.68, 95% CI: 1.16-2.42). Risk increased with increasing duration of use, but did not differ between women who first used oral contraceptives before the first pregnancy and those who first used them later, or between women who first used oral contraceptives before age 25 and those who first used them at a later age. Risk also appeared to increase with number of years of use before the first pregnancy or before age 25, although numbers were small. History of benign breast disease did not influence risk. The association of breast cancer risk with oral contraceptive use appeared stronger in women from Suffolk County than Nassau County. SN - 1044-3983 UR - https://www.unboundmedicine.com/medline/citation/1742384/Breast_cancer_risk_and_oral_contraceptive_use:_results_from_a_large_case_control_study_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=1742384.ui DB - PRIME DP - Unbound Medicine ER -