71
We read with interest the results of the HARMONi-6 trial by Zhiwei Chen and colleagues,1 which showed that ivonescimab plus chemotherapy improved progression-free survival versus tislelizumab plus chemotherapy in advanced squamous non-small-cell lung cancer (NSCLC). However, PD-L1-based subgroup results reveal a critical stratification signal. In patients with PD-L1 tumour proportion score (TPS) of under 50%, dual blockade achieved marked benefit (hazard ratio [HR] 0·63; 95% CI 0·41–0·98), whereas in patients with PD-L1 TPS of 50% or over, the improvement was numerical but not significant (HR 0·71; 0·37–1·33).
