Extended Data Fig. 6: Exploratory analysis of OS in subgroups defined by the F1L CDx assay OS survival curves for the bTMB ≥13.6 mut/Mb population atezolizumab arm vs chemotherapy arm and OS HRs at various bTMB cutoffs.

Exploratory analysis of OS in subgroups defined by the F1L CDx assay (A) OS survival curves for the bTMB ≥13.6 mut/Mb population atezolizumab arm vs chemotherapy arm. Statistical analysis used a stratified log-rank test at the two-sided 0.05 level and was not adjusted for multiple comparisons. (B) Forest plot of OS HRs at various bTMB cutoffs. Atezo, atezolizumab; bTMB, blood-based tumor mutational burden; Chemo, chemotherapy; F1L CDx, FoundationOne Liquid Companion Diagnostic assay; HR, hazard ratio; OS, overall survival; PFS, progression-free survival. P values are descriptive.