Health-related quality of life (HRQoL) in patients with metastatic colorectal cancer (mCRC) treated with sotorasib and panitumumab (pmab) versus trifluridine/tipiracil (T/T) or regorafenib (rego) in CodeBreaK 300.

Abstract

10 Background: CodeBreaK 300 (NCT05198934) is a phase 3, multicenter, randomized, open-label study, evaluating sotorasib 960 mg (soto960) + pmab, sotorasib 240 mg (soto240) + pmab against investigator’s choice T/T or rego in patients with chemorefractory KRAS G12C-mutated mCRC. The study met its primary endpoint and demonstrated statistically significant improvement in progression-free survival with both doses of sotorasib. This analysis evaluated patient-reported outcomes (PROs) as secondary and exploratory endpoints in CodeBreaK 300. Methods: Change in PRO scores from study baseline through week 8 was compared for soto960+pmab and soto240+pmab vs the control group using a mixed effect model for repeated measures. PRO instruments included the Brief Fatigue Inventory, the Brief Pain Inventory, and the European Organisation for Research and Treatment of Cancer Core 30-item Quality of Life questionnaire. Time to deterioration (TTD) were assessed using Kaplan-Meier plots and Cox proportional hazard models. All analyses were conducted on patients with baseline and at least one post-baseline PRO score. Results: 160 pts were randomized 1:1:1 to soto960+pmab (n=53), soto240+pmab (n=53), or T/T or rego (n=54). Compliance rates for PRO assessments were high (>83%) and similar across the three treatment groups. Least square (LS) mean changes from baseline in fatigue at its worst, pain at its worst, physical functioning (PF), and global health status (GHS)/QoL favored the two sotorasib dose groups (Table). The 95% confidence intervals (CI) suggested improvement in pain at its worst and PF for both sotorasib dose groups, and improvement in GHS/QoL for the soto960+pmab group versus the control group. TTD hazard ratios < 1 indicated a trend in delayed deterioration for patients treated in both sotorasib dose groups. The 95% CIsuggested delays with respect to fatigue at its worst and PF for the soto240+pmab group. Conclusions: In CodeBreaK 300, both doses of sotorasib resulted in better HRQoL and a trend to decreased risk of deterioration vs the control group. In addition to improved clinical outcomes, these findings provide further evidence on the benefit of soto+pmab in patients with chemorefractory mCRC. Clinical trial information: NCT05198934 . [Table: see text]