did not reach statistical significanceP = 0.0712
OS was longer for patients with wild-type KRAS than for those with mutant KRAS in both the trifluridine/tipiracil and placebo arms overall and among all regions; HRs for OS favoured trifluridine/ tipiracil over placebo regardless of KRAS status, although this benefit for patients with mutant KRAS did not reach statistical significance (P = 0.0712).