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["Patient Characteristics"]
["Characteristic","No Evidence of Disease (N = 52)","Locoregional Recurrence (N = 25)"]
["Age - Year"]
["     Median",57.8,57.7]
["     Range","23-82","39-75"]
["Subsite"]
["     Oral cavity",25,17]
["     Oropharynx",7,2]
["     Larynx",13,2]
["     Hypopharynx",7,4]
["T Stage"]
["     T1",6,1]
["     T2",18,2]
["     T3",18,5]
["     T4",19,17]
["N Stage"]
["     N0",17,3]
["     N1",13,6]
["     N2",23,16]
["     N3",1,0]
["Extracapsular Extension"]
["     Yes",24,17]
["     No",28,8]
["Surgical Margins"]
["     Positive",7,8]
["     Negative",45,17]