Table 2.

Clinical and pathological data of patients.

Characteristics	No. of patients (n = 146)
Gender
Male	86
Female	60
Tumor location
Upper rectum	55
Middle rectum	66
Low rectum	25
Differentiated grade
Well differentiated	28
Moderately differentiated	67
Poorly differentiated	51
Pathological T stage
T1	8
T2	37
T3a	25
T3b	54
T3c	17
T4	5
Pathological N stage
N0	91
N1	40
N2	15