Table 1.

Patients and tumor characteristics

Total (N = 200)n (%)
Mean age, y (range)65 (43-90)
    <6599 (49.5)
    ≥65101 (50.5)
Gender
    Male172 (86.0)
    Female28 (14.0)
Primary tumor
    T1/T254/45 (27.0/22.5)
    T3/T467/34 (33.5/17.0)
Regional lymph nodes
    N073 (38.5)
    N1123 (61.5)
Distant metastasis
    M0167 (83.5)
    M133 (16.5)
Stage
    I/IIA/IIB37/33/33 (18.5/16.5/16.5)
    III/IV64/33 (32.0/16.5)
Histology
    Well differentiated (G1)42 (21.0)
    Moderately differentiated (G2)107 (53.5)
    Poorly differentiated (G3)51 (25.5)
Location
    Upper37 (18.5)
    Middle107 (53.5)
    Lower56 (28.0)