LAUSR

BACKGROUND: Breast Conservation Surgery (BCS) includes either partial mastectomy or oncoplastic surgery, of which oncoplastic surgery has become increasingly prevalent. Previous studies have examined BCS rates and post-operative complications, however, no known study has analyzed racial disparity in BCS utilization rates. Understanding racial disparity is crucial to addressing health equality and access to care. Therefore, our study aims to examine racial differences in BCS utilization rates within an 11-year period to determine how these rates have changed over time. METHODS: This retrospective cohort analysis utilized the NSQIP (National Surgical Quality Improvement Program) database to identify women who underwent BCS procedures between 2008-2018. All patients were diagnosed with ductal carcinoma in situ or invasive breast cancer. BCS was further sub-divided into partial mastectomy and oncoplastic surgery. Patient demographics were recorded, and racial utilization trends were analyzed using a Cochran- Armitage test and Index of Disparity analysis, which is a method for summarizing proportional changes within a group’s population and its subgroups. RESULTS: In the 11-year period, 180,700 women underwent a breast cancer resection, of which 46% underwent BCS. Within BCS, 92% underwent a partial mastectomy and 8% received oncoplastic procedures. For both BCS subgroups, Caucasian women held the highest sample size (82%), followed by African Americans (12%), and Asian Americans (5%). Within the total sample size, BCS utilization increased from 38% in 2008 to 53% in 2018. Within the BCS subgroup, the proportion of patients having oncoplastics increased from 3.5% in 2008 to 10% in 2018, leading to a declining proportion of partial mastectomies: 96.5% to 90.0% (all p Citation Format: Jolie Jean, Michael M. Jonczyk, Christopher Homsy, Stephen Naber, Abhishek Chatterjee. Examining a decade of racial disparity in partial mastectomy and oncoplastic surgery [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr SS1-03.