Phase III meta-analysis of first-line chemo-immunotherapy in ES-SCLC: Survival benefit without detectable class-level differences

Adding a PD-1/PD-L1 inhibitor to platinum-etoposide in first-line ES-SCLC provides a consistent overall survival benefit, with no statistically detectable differences between PD-1 and PD-L1 inhibitor classes. This finding should be interpreted as absence of detectable class-level divergence rather than pharmacologic equivalence.