a positive trendp = 0.08
We then stratified the analysis of TMB across the eligible tumor types and found significant associations with ICB response in melanoma and NSCLC (melanoma: 1.5-fold, Welch’s two-tailed t test p = 2.0 × 10 −5 ; NSCLC: 2.5-fold, p = 0.003) and a positive trend amongst bladder and head and neck tumors (bladder: 1.9-fold, Welch’s two-tailed t test p = 0.08; head and neck: 1.1-fold, p = 0.94) (Fig. 1e ).