Temporal trends of adverse events and costs of nivolumab plus ipilimumab versus sunitinib in advanced renal cell carcinoma

Aims: To assess grade 3/4 adverse events (AEs) and costs of first-line nivolumab plus ipilimumab versus sunitinib in advanced or metastatic renal cell carcinoma. Methods: Individual patient data from the all treated population in the CheckMate 214 trial (nivolumab plus ipilimumab, n = 547; sunitinib, n = 535) were used to calculate the number of AEs. AE unit costs were obtained from US 2017 Healthcare Cost and Utilization Project and inflated to 2020 values. Results: The proportion of patients experiencing grade 3/4 AEs decreased over time. Patients who received nivolumab plus ipilimumab had lower average per-patient all-cause grade 3/4 AE costs versus sunitinib (12-month: US15,170 vs US-20,342; 42-month: US-19,096 vs US-27,473). Conclusion: Treatment with nivolumab plus ipilimumab was associated with lower grade 3/4 AE costs than sunitinib.