Published in Cancer Detection and Prevention 1998; 22(6):495-498.

Early and Late Stage Breast Cancer in a Managed Care Setting in Relation to Mammography Screening

Sharon J Rolnick, Ph.D., Patrick J O'Connor, M.D., Jody M. Jackson, B.A., Raymond G. Boyle, Ph.D., Nico P. Pronk, Ph.D., and Linda M Loes, M.D.

Group Health Foundation SJR, PJO, JMJ, RGB, LML, HealthPartners Center for Health Promotion NPP

Address all correspondence and reprint requests to: Dr. Sharon Rolnick at the following address: Group Health Foundation, 8100 34th Avenue South, P.O. Box 1309, Bloomington, Minnesota 55440-1309 Tel: (612) 883-5016 Fax: (612) 883-5022

ABSTRACT: A case-control study was conducted to ascertain occurrence of advanced and early stage breast cancer, use of mammography and the relationship between the two. All women with Stage III/ IV breast cancer (N = 46) were matched to two controls (Stage 0/I and Stage II) by year of diagnosis and age. Matched pair analyses assessed antecedent use of screening mammography. Results indicated that advanced stage patients were significantly less likely than their Stage 0/I counterparts to have had antecedent screening within 13 months of diagnosis [χ2: 5.78, OR: 6.0, p < 0.05]. Cases compared to Stage II controls did not differ statistically. Efforts should focus on increasing mammography in currently targeted age groups. Considerations might be toward extending regular screening for women 40-49 and over 75.

KEY WORDS: Breast Neoplasms, Case-Control Studies.