27
        
        
          Overall Survival (% of patients)
        
        
          Months
        
        
          0
        
        
          3
        
        
          6
        
        
          9
        
        
          12
        
        
          15
        
        
          18
        
        
          0
        
        
          10
        
        
          20
        
        
          30
        
        
          40
        
        
          50
        
        
          60
        
        
          70
        
        
          80
        
        
          90
        
        
          100
        
        
          Months
        
        
          0
        
        
          3
        
        
          6
        
        
          9
        
        
          12
        
        
          15
        
        
          18
        
        
          0
        
        
          10
        
        
          20
        
        
          30
        
        
          40
        
        
          50
        
        
          60
        
        
          70
        
        
          80
        
        
          90
        
        
          100
        
        
          Overall Survival (% of patients)
        
        
          Nivolumab (n = 63)
        
        
          Investigator’s Choice (n = 29)
        
        
          Nivolumab (n = 50)
        
        
          Investigator’s Choice (n = 36)
        
        
          HR (95% CI)
        
        
          0.56 (0.32, 0.99)
        
        
          HR (95% CI)
        
        
          0.73 (0.42, 1.25)
        
        
          p16-Negative
        
        
          p16-Positive
        
        
          Nivolumab
        
        
          Investigator’s
        
        
          Choice
        
        
          No. at Risk
        
        
          63
        
        
          49
        
        
          35
        
        
          0
        
        
          29
        
        
          20
        
        
          11
        
        
          0
        
        
          18
        
        
          4
        
        
          10
        
        
          1
        
        
          3
        
        
          0
        
        
          50
        
        
          32
        
        
          25
        
        
          0
        
        
          36
        
        
          26
        
        
          13
        
        
          0
        
        
          12
        
        
          7
        
        
          6
        
        
          3
        
        
          1
        
        
          1
        
        
          Overall Survival by p16 Status
        
        
          Nivolumab in R/M SCCHN After Platinum Therapy