Health-related quality of life (HRQoL) in previously untreated patients with advanced renal cell carcinoma (aRCC) in CheckMate 214: Five-year follow-up results

307 Background: Nivolumab + ipilimumab (N+I) demonstrated durable, long-term survival in the phase 3 CheckMate 214 trial as first-line treatment for intermediate/poor (I/P)-risk patients (pts) with aRCC. After a minimum follow-up of 5 years, N+I maintained superior overall survival and response benefits vs sunitinib (S) in both I/P-risk pts and across all randomized pts. We report the HRQoL results from the 5-year follow-up. Methods: Pts were randomized 1:1 to receive N 3 mg/kg + I 1 mg/kg every 3 weeks (wks) for 4 cycles followed by N 3 mg/kg every 2 wks or S 50 mg/d orally for 4 wks (6-wk cycle). HRQoL was assessed using the FKSI-19, FACT-G, and EQ-5D-3L instruments at baseline (BL) and on day 1 of wks 1 and 4 of the first 2 cycles, on day 1 of wks 1 and 5 of the next 2 cycles, and on day 1 of wk 1 of subsequent cycles. The analyses included mixed-model repeated measures (MMRM) for change from BL across 59 months (while on-treatment) and time to confirmed deterioration (TCD). Bother with treatment side effects (item GP5 in FKSI-19) was assessed using a generalized estimating equations model with response dichotomized as minimal bother (“not at all” or “a little bit”) vs notable bother (“somewhat”, “quite a bit”, and “very much”). Results: 1096 pts were randomized to N+I (I/P-risk: 425; favorable [F]-risk: 125) and S (I/P-risk: 422; F-risk: 124). In the overall and I/P-risk populations, N+I pts reported improved mean FKSI-19 total scores over time compared with a decline observed with S. Overall changes from BL through 59 months favored N+I over S with significant differences between arms observed for all outcomes (Table). Median TCD was significantly longer with N+I vs S for all FKSI-19 scores, as well as FACT-G total and physical domains for both populations ( P < 0.05). Pts in the N+I arm were 76% (odds ratio [95% CI]: 0.24 [0.16–0.35]) and 73% (0.27 [0.18–0.40]) less likely to be notably bothered by side effects than pts in the S arm in the total and I/P-risk populations, respectively. Conclusions: Pts reported HRQoL benefits with N+I vs S. Treatment with N+I showed a decreased risk of being bothered by treatment side effects and of experiencing clinically meaningful deterioration in HRQoL in contrast with S. These results suggest that the superior efficacy of N+I over S comes with the additional benefit of improved long-term HRQoL. Clinical trial information: NCT02231749. [Table: see text]