Abstract PO4-23-03: The Influence of Reconstruction Type on Outcomes in Women Undergoing Mastectomy with Immediate Reconstruction: A Nationwide Study

Abstract INTRODUCTION: Outcomes after mastectomy with immediate reconstruction may vary depending on the type of reconstruction, but the evidence is limited and inconsistent. The purpose of this study was to compare the most common reconstruction techniques in a large national cohort of women undergoing these procedures. METHODS: The Nationwide Readmissions Database for 2016-2020 was queried for all women aged 18 years or older undergoing mastectomy for breast cancer with immediate reconstruction. The primary outcome was prolonged length of stay (LOS) greater than 7 days. The secondary outcomes were readmission within 30 days and readmission to a different hospital. The types of reconstruction were compared along with all other relevant variables from the database. Univariable comparison was performed using chi-squared tests for each outcome. Multivariable logistic regression was performed using all significant confounders. RESULTS: During the study period, 35,430 patients were identified undergoing mastectomy for breast cancer with immediate reconstruction. The rate of prolonged (LOS) was 2.4% (n= 840) and the readmission rate was 5.4% (n=1,919). From the readmitted patients, the rate of readmission to a different hospital was 14.2% (n=273). Controlling for confounders with multivariable logistic regression revealed the strongest risk factors for prolonged LOS were latissimus dorsi flap (OR 5.4 4.0-7.4 p 0.001) and an investor-owned hospital (OR 4.3 3.5-5.2 p 0.001). The highest risk of readmission was a transverse rectus abdominis flap (OR 1.3 1.1-1.6 p 0.001) and the highest risk of readmission to a different hospital was a small hospital (OR 2.2 1.6-3.1 p 0.001). CONCLUSION: Reconstruction type influences outcomes in women undergoing mastectomy. These outcomes have significant implications for surgical decision-making and fragmentation of care. Further research to identify ways to reduce adverse outcomes and improve patient satisfaction is warranted. Citation Format: Lucia Castro Hernandez, Joshua Parreco. The Influence of Reconstruction Type on Outcomes in Women Undergoing Mastectomy with Immediate Reconstruction: A Nationwide Study abstract. In: Proceedings of the 2023 San Antonio Breast Cancer Symposium; 2023 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2024;84(9 Suppl):Abstract nr PO4-23-03.