Use of advanced imaging and biomarker tests for post-treatment surveillance in early-stage breast cancer survivors.

Abstract

168 Background: The American Society of Clinical Oncology (ASCO) released a “Top Five” list of opportunities to improve the quality of cancer care. #4 focused on post-treatment surveillance in breast cancer patients treated with curative intent. The ASCO guideline on breast cancer follow up advises against using advanced imaging and biomarkers in this setting. We undertook an examination of the patterns of follow-up care for breast cancer survivors treated at an academic medical center to evaluate use of non-recommended services. Methods: Claims data and medical records were reviewed and abstracted for early stage (0-IIIA) breast cancer survivors starting one year post diagnosis, with an average of 5 years of follow-up data. A trained abstractor classified imaging tests as diagnostic/surveillance based on medical record content. A 10% random sample was abstracted by a second abstractor and compared for concordance. Descriptive statistics were generated for patient demographic and medical characteristics, and proportions for receipt of non-recommended services, including if imaging procedures were performed for diagnostic/surveillance purposes. Multivariate logistic regression modeling was used to determine factors associated with receiving non-recommended services. Results: Records were available for 258 patients. The mean age was 62 (SD 13), mean time since diagnosis was 6 years (SD 2), 66% were stage 0/1. 35% received at least one abdominal CT, 31% at least one chest CT, 20% at least one PET, 30% at least one bone scan. Of these services, 90 abdominal CT scans (47%), 131 chest CT scans (65%), 77 PET scans (90%), and 29 bone scans (26%) were classified as surveillance. 80% received CEA and/or CA 27.29 tests; 8% received CA 15-3 tests. Logistic regression revealed no consistent association of medical, demographic, or provider factors with receiving non-recommended services. Conclusions: Use of non-recommended services for surveillance occurs frequently among early stage survivors. Providers in this academic center had no personal financial incentive for ordering these services. There are opportunities to increase use of guideline concordant post-treatment care for breast cancer survivors.