Progression-Free Survival
        
        
          Nivolumab in R/M SCCHN After Platinum Therapy
        
        
          25
        
        
          Months
        
        
          Nivolumab
        
        
          240
        
        
          79
        
        
          32
        
        
          12
        
        
          4
        
        
          1
        
        
          0
        
        
          Investigator’s
        
        
          Choice
        
        
          121
        
        
          43
        
        
          9
        
        
          2
        
        
          0
        
        
          0
        
        
          No. at Risk
        
        
          0
        
        
          Progression-Free Survival
        
        
          (% of patients)
        
        
          0
        
        
          3
        
        
          6
        
        
          9
        
        
          12
        
        
          15
        
        
          18
        
        
          0
        
        
          10
        
        
          20
        
        
          30
        
        
          40
        
        
          50
        
        
          60
        
        
          70
        
        
          80
        
        
          90
        
        
          100
        
        
          6-month PFS rate (95% CI)
        
        
          19.7%
        
        
          (14.6, 25.4)
        
        
          9.9%
        
        
          (5.0, 16.9)
        
        
          Median OS, mo
        
        
          (95% CI)
        
        
          HR
        
        
          (97.73% CI)
        
        
          P
        
        
          -value
        
        
          Nivolumab (n = 240)
        
        
          2.0 (1.9, 2.1)
        
        
          0.89
        
        
          (0.70, 1.1)
        
        
          0.3236
        
        
          Investigator’s Choice (n = 121)
        
        
          2.3 (1.9, 3.1)