Pathologic complete responses and overall survival after neoadjuvant chemotherapy for muscle-invasive bladder cancer: Analyzing the impact of race.

Authors

Arya Mariam Roy

Arya Mariam Roy

Roswell Park Comprehensive Cancer Center, Buffalo, NY

Arya Mariam Roy, Changchuan Jiang, Stuthi Perimbeti, Karan Jatwani, Gurkamal S. Chatta, Dharmesh Gopalakrishnan

Organizations

Roswell Park Comprehensive Cancer Center, Buffalo, NY, Roswell Park Cancer Center, Buffalo, NY

Research Funding

No funding received
None.

Background: Neoadjuvant chemotherapy (NAC) has been demonstrated to improve overall survival (OS) after radical cystectomy (RC) in patients with muscle-invasive bladder cancer (MIBC). We compared pathologic complete response (PCR) rates and OS after NAC between African American (AA) and Caucasian patients with MIBC. Methods: We queried the National Cancer Database for Caucasian and AA patients with localized MIBC (cT2-T4aN0M0) with urothelial histology who received NAC + RC between 2007 and 2018. We excluded patients who belonged to other races, had nodal or distant metastases, non-urothelial histology, did not receive NAC, or had missing pathological data. Logistic regression was used to analyze PCR and residual disease (RD) and Cox proportional hazards regression to analyze OS, with adjustment for age at diagnosis, race, stage, grade, insurance, treatments received, and comorbidities. STATA/IC 16.0 was used for analysis and a two-sided p-value < 0.05 was considered significant. Results: A total of 7008 Caucasians and 424 AAs with MIBC were identified. 75.6% were males and 24.4% were females. Among those who received NAC, only 12.6% (n = 933) attained PCR and 87.4% (n = 6499) had RD. Among Caucasians, 12.76% (n = 894) attained PCR and 87.24% (n = 6114) had RD. Among AAs, 9.2 % (n = 39) had PCR and 90.8% (n = 385) had RD. AA had more likelihood of attaining PCR when compared to Caucasians, but was not statistically significant (OR = 1.35, 95% CI = 0.966 – 1.90, p = 0.078). The median OS of patients with PCR and RD were 144 and 47 months respectively. Patients who had RD had significantly higher mortality risk when compared to those who attained PCR (HR = 3.67, 95% CI = 3.14-4.29, p < 0.01). In the PCR group and RD groups, AA vs Caucasian race was not associated with a statistically significant mortality benefit in univariate or multivariate analysis. Within PCR and RD groups, AAs were found to have mortality risk compared to Caucasians (PCR group: HR = 1.53, 95% CI = 0.2-1.43, p = 0.21 and RD group: HR = 1.07, 95% CI = 0.93- 1.2, p = 0.34). Conclusions: PCR with NAC in localized MIBC was associated with significantly improved overall survival. AA or Caucasian race was not independently predictive of PCR or OS after NAC in MIBC.

Disclaimer

This material on this page is ©2024 American Society of Clinical Oncology, all rights reserved. Licensing available upon request. For more information, please contact licensing@asco.org

Abstract Details

Meeting

2022 ASCO Quality Care Symposium

Session Type

Poster Session

Session Title

Poster Session A

Track

Cost, Value, and Policy,Health Care Access, Equity, and Disparities,Patient Experience

Sub Track

Cancer Outcome Disparities

Citation

J Clin Oncol 40, 2022 (suppl 28; abstr 146)

DOI

10.1200/JCO.2022.40.28_suppl.146

Abstract #

146

Poster Bd #

E15

Abstract Disclosures