In the overall population containing both squamous and non-squamous NSCLC patients, investigator-assessed PFS HR (95% CI) was 0.50 (0.39, 0.64), p<0.0001. The median PFS was 7.8 months vs. 4.9 months in CS1001 combined with chemotherapy and placebo combined with chemotherapy, respectively...Subgroup analyses showed clinical benefit across histology subtypes and PD-L1 expression levels...