Contemporary vs historical survival rates in metastatic clear cell renal carcinoma according to race/ethnicity.

PURPOSE: Systemic therapies (ST) improved contemporary survival rates, relative to historical in clear cell metastatic renal carcinoma (ccmRCC) patients. The magnitude of this improvement is unknown according to race/ethnicity. METHODS: Within the SEER registry (2000-2017), ccmRCC patients were stratified according to race/ethnicity (Caucasian, Hispanic, African American, Asian) and historical (2000-2009) vs contemporary (2010-2017) years of diagnosis. Competing risks regression (CRR) with adjustment for other-cause mortality and Poisson smoothed cumulative incidence plots addressed cancer-specific mortality (CSM). RESULTS: Of 10,141 mRCC patients, 4316 (43%) vs 5825 (57%) were diagnosed in historical vs contemporary era. Of 4316 historical patients, 3203 (74%) vs 593 (14%) vs 293 (7%) vs 227 (5%) were Caucasian, Hispanic, African American and Asian. Of 5825 contemporary patients, 4124 (71%) vs 977 (17%) vs 362 (6%) vs 362 (6%) were Caucasian, Hispanic, African American and Asian. Between 2000 and 2017, ST rates ranged from 12 to 57% in Caucasians, 2 to 57% in Hispanics, 33 to 50% in African Americans, 17 to 70% in Asians and universally increased toward a plateau in 2010. In Caucasians, CSM decreased from 80 to 74% vs 79 to 74% in Hispanics vs 79 to 77% in African Americans, but not in Asians (67-73%). Nonetheless, these rates translated into independent predictor status of contemporary years of diagnosis in all race/ethnicity groups: CSM hazard ratios of 0.75, 0.75, 0.73 and 0.80 in, respectively, Caucasian, Hispanic, African American and Asian. CONCLUSIONS: In all race/ethnicity groups, contemporary ST rates increased and improved CSM rates have also been recorded.

Other-cause mortality and access to care in metastatic renal cell carcinoma according to race/ethnicity.

BACKGROUND: We tested for other-cause mortality (OCM) differences according to race/ethnicity in metastatic renal cell carcinoma (mRCC). Such differences may affect treatment considerations. METHODS: Within the Surveillance, Epidemiology, and End Results Research Plus repository (2000-2018), we identified clear cell (ccmRCC) and non-clear cell (non-ccmRCC) mRCC patients and stratified according to race/ethnicity: Caucasian vs. Hispanic vs. African American vs. Asian. Poisson smoothed cumulative incidence plots and competing risks regression (CRR) models addressing OCM, after adjustment for cancer-specific mortality , were fitted. Subsequently, multivariable logistic regression models tested access to cytoreductive nephrectomy (CNT) and systemic therapy (ST). RESULTS: Of 10,958 ccmRCC patients, 7,892 (72%), 1,743 (16%), 688 (6%), and 635 (6%) were Caucasian, Hispanic, African American, and Asian, respectively. Of 1,239 non-ccmRCC patients, 799 (64%), 106 (9%), 278 (22%), and 56 (5%) were Caucasian, Hispanic, African American, and Asian, respectively. In multivariable CRR models, OCM was higher in African Americans vs. Caucasians in ccmRCC (HR:1.55; CI:1.19-2.01; P < 0.001) and in non-ccmRCC (HR:1.54; CI:1.01-2.35; P = 0.04). In multivariable logistic regression models, African Americans with ccmRCC were less likely to undergo CNT (OR:0.72, CI:0.60-0.86; P < 0.001), but more likely to undergo ST (OR:1.34, CI:1.11-1.61; P = 0.002). CONCLUSIONS: In this retrospective analysis, African Americans with ccmRCC and non-ccmRCC exhibited higher OCM than Caucasians. Based on higher OCM, African Americans were less likely to undergo CNT, but more likely to benefit from ST.