Background: Cabozantinib, a tyrosine kinase inhibitor (TKI), is a prevalent second-line (2 L) therapy and was approved for use after progression on TKIs. However, the 1 L treatment setting has changed since the approval of cabozantinib monotherapy in salvage therapy settings., Objective: To assess the differential effectiveness of cabozantinib after prior progression on 1 L ipilimumab with nivolumab (IPI + NIVO) compared to programmed death receptor-1 (PD-1) or PD-1 ligand (PD-L1) inhibitors (PD1/L1i) with TKIs., Methods: Utilizing a nationwide electronic health record (EHR)-derived de-identified database, we included patients with metastatic clear cell renal cell carcinoma (mccRCC) who received 1 L treatment with an immune checkpoint inhibitor (ICI)-based combination and 2 L treatment with cabozantinib monotherapy. These patients were categorized based on the type of 1 L ICI-based combination received: IPI + NIVO vs. PD1/L1i with TKI. Real-world time to next therapy (rwTTNT) and real-world overall survival (rwOS) were summarized using Kaplan-Meier curves and compared using Cox-proportional hazard models adjusted for International mRCC Database Consortium (IMDC) risk groups., Results: Among 12,285 patients with metastatic renal cell carcinoma, 237 were eligible and included. Median rwTTNT was 8 months for the IPI + NIVO subgroup and 7.5 months for the PD1/L1i + TKI subgroup (HR 1.05, 95% CI: 0.74-1.49, p = 0.8). Median rwOS was 17 months for IPI + NIVO and 16 months for PD1/L1i + TKI subgroup (HR 0.79, 95% CI: 0.52-1.20, p = 0.3)., Conclusions: Cabozantinib remains effective as a 2 L therapy for mccRCC independent of the type of prior 1 L ICI-based combination. Further research is needed to validate these findings and explore the ideal sequencing of therapies., Competing Interests: Dr. Agarwal: NA has received honorarium before May 2021 and during his lifetime for consulting to Astellas, AstraZeneca, Aveo, Bayer, Bristol Myers Squibb, Calithera, Clovis, Eisai, Eli Lilly, EMD Serono, Exelixis, Foundation Medicine, Genentech, Gilead, Janssen, Merck, MEI Pharma, Nektar, Novartis, Pfizer, Pharmacyclics, and Seattle Genetics; and NA’s institution has received research funding during his lifetime from Arnivas, Astellas, AstraZeneca, Bavarian Nordic, Bayer, Bristol Meyers Squibb, Calithera, Celldex, Clovis, CRISPR Therapeutics, Eisai, Eli Lilly, EMD Serono, Exelixis, Genentech, Gilead, Glaxo Smith Kline, Immunomedics, Janssen, Lava, Medivation, Merck, Nektar, Neoleukin, New Link Genetics, Novartis, Oric, Pfizer, Prometheus, Rexahn, Roche, Sanofi, Seattle Genetics, Takeda, and Tracon. NA is a member of the editorial board of Kidney Cancer but was not involved in the peer-review process of this paper, nor had access to any information regarding its peer-review. Umang Swami, MD: US reports consultancy to Astellas, AstraZeneca, Adaptimmune, Exelixis, Gilead, Imvax, Pfizer, Seattle Genetics and Sanofi and research funding to institute from Janssen, Exelixis and Astellas/Seattle Genetics. Benjamin L. Maughan, MD: BLM has received financial compensation as a paid consultant/advisor to Abbive, Pfizer, AVEO oncology, Janssen, Astellas, Bristol-Myers Squibb, Clovis, Tempus, Merck, Exelixis, Bayer Oncology, Lilly, Sanofi, Telix, Xencor, NCCN and Peloton Therapeutics. Huntsman Cancer Institute has received research funding from Exelixis, Bavarian-Nordic, Clovis and Bristol-Myers Squibb on his behalf. AN, GB, NJ, VMT, HL, GGF, NS, CT, NT, BC, AS, CHC and BN have no conflicts of interest to report, (© 2024 – The authors. Published by IOS Press.)