Translating Access to Outcomes: The Impact of Socioeconomic Status on Completion of Breast Reconstruction at a National Cancer Institute (NCI)-Designated Cancer Center: Impact of SES on Completion

The purpose of this study was to determine the impact of socioeconomic status (SES) on the completion of breast reconstruction, as defined by the percent of patients undergoing NAC reconstruction. Patients (n=949) who underwent primary breast reconstruction following a mastectomy recorded from 2007 to 2017 were divided into groups based on the median household income of their residential zip code (>/< $67,640). A three-step protocol was designed to (1) broadly compare between patients of low and high SES who were stratified by race and reconstruction type, (2) compare a smaller subset of low SES and high SES patients via propensity matching for demographic, baseline health, and oncologic factors, and (3) elucidate the strongest predictors of non-completion and delayed completion among low SES patients. Patients of lower SES appear less likely to complete NAC reconstruction, especially following staged reconstruction. That this finding presents in staged, but not immediate reconstruction, and disappears with propensity matching for oncologic factors suggests that reduced completion in patients of low SES may be attributable to advanced cancer staging and aggressive adjuvant therapy. Furthermore, expander conversion to autologous reconstruction significantly increased the likelihood of NAC reconstruction in multivariable analysis, and adjuvant radiation therapy significantly increased the time to NAC reconstruction. Further investigation will solidify the relationship between SES, cancer staging, and completion of reconstruction in a multi-site patient population. Larger multivariable analyses may also uncover other factors that can be modified or addressed to increase completion and optimize reconstruction for patients at risk of discontinuation.