Table 2.

Patient characteristics at baseline

VariableNo. patients
Enrolled patients35
Age (y), range/median40-81/54
Male/female32/3
Eastern Cooperative Oncology Group performance status
    015
    120
Site of primary tumor
    Oral cavity17
    Oropharyngeal7
    Hypopharyngeal5
    Larynx6
Smoking history
    Never smokers5
    Former smokers6
    Current smokers20
    Unknown4
Use of antiacids
    Treated/not treated/unknown3/31/1