Undertreatment Strongly Decreases Prognosis of Breast Cancer in Elderly Women

Abstract
Purpose: No consensus exists on therapy of elderly cancer patients. Treatments are influenced by unclear standards and are usually less aggressive. This study aims to evaluate determinants and effect of treatment choice on breast cancer prognosis among elderly patients. Patients and Methods: We reviewed clinical files of 407 breast cancer patients aged ≥ 80 years recorded at the Geneva Cancer Registry between 1989 and 1999. Patient and tumor characteristics, general health status, comorbidity, treatment, and cause of death were considered. We evaluated determinants of treatment by logistic regression and effect of treatment on mortality by Cox model, accounting for prognostic factors. Results: Age was independently linked to the type of treatment. Overall, 12% of women (n = 48) had no treatment, 32% (n = 132) received tamoxifen only, 7% (n = 28) had breast-conserving surgery only, 33% (n = 133) had mastectomy, 14% (n = 57) had breast-conserving surgery plus adjuvant therapy, and 2% (n = 9) received miscel...