Nivolumab
        
        
          (n = 240)
        
        
          Investigator’s
        
        
          Choice
        
        
          (n = 121)
        
        
          Total
        
        
          (N = 361)
        
        
          Investigator’s choice therapy, n (%)
        
        
          Methotrexate
        
        
          –
        
        
          52 (43.0)
        
        
          –
        
        
          Docetaxel
        
        
          –
        
        
          54 (44.6)
        
        
          –
        
        
          Cetuximab
        
        
          –
        
        
          15 (12.4)
        
        
          –
        
        
          Ongoing treatment, n (%)
        
        
          41 (17.4)
        
        
          3 (2.7)
        
        
          44 (12.7)
        
        
          Not continuing treatment, n (%)
        
        
          195 (82.6)
        
        
          108 (97.3)
        
        
          303 (87.3)
        
        
          Disease progression
        
        
          162 (68.6)
        
        
          83 (74.8)
        
        
          245 (70.6)
        
        
          Study drug toxicity
        
        
          9 (3.8)
        
        
          11 (9.9)
        
        
          20 (5.8)
        
        
          Adverse event not related to study drug
        
        
          12 (5.1)
        
        
          3 (2.7)
        
        
          15 (4.3)
        
        
          Other
        
        
          a
        
        
          9 (3.8)
        
        
          11(9.9)
        
        
          20 (5.8)
        
        
          Not reported
        
        
          3 (1.3)
        
        
          0
        
        
          3 (0.9)
        
        
          Treatment Administration and Patient Disposition
        
        
          Nivolumab in R/M SCCHN After Platinum Therapy
        
        
          a
        
        
          Other includes patient request to discontinue, withdrawal of consent, non-compliance and maximum clinical benefit.