30
        
        
          PD-L1
        
        
          Expression Level
        
        
          Objective Response Rate
        
        
          Nivolumab
        
        
          Investigator’s Choice
        
        
          n/N
        
        
          %
        
        
          n/N
        
        
          %
        
        
          ≥ 1%
        
        
          15/88
        
        
          17.0
        
        
          1/61
        
        
          1.6
        
        
          ≥ 5%
        
        
          12/54
        
        
          22.2
        
        
          1/43
        
        
          2.3
        
        
          ≥ 10%
        
        
          12/43
        
        
          27.9
        
        
          1/34
        
        
          2.9
        
        
          < 1%
        
        
          9/73
        
        
          12.3
        
        
          4/38
        
        
          10.5
        
        
          < 5%
        
        
          12/107
        
        
          11.2
        
        
          4/56
        
        
          7.1
        
        
          < 10%
        
        
          12/118
        
        
          10.2
        
        
          4/65
        
        
          6.2
        
        
          Objective Response Rate by PD-L1 Expression
        
        
          Nivolumab in R/M SCCHN After Platinum Therapy