Table 1. Characteristics of the colorectal adenocarcinoma patients screened (N = 172).

Characteristic	Number	(%)
Age (years)  Median, (range)	59	(28–84)
Sex  Male  Female	103 69	(59.9) (40.1)
Primary site  Colon  Rectum	100 72	(58.1) (41.9)
Operation  Hemicolectomy  Low anterior resection  Anterior resection  Mile's operation  Others	54 45 44 23 6	(31.4) (26.2) (25.6) (13.4) (3.5)
Pathologic stage  I  II  III  IV	20 73 76 3	(11.6) (42.4) (44.2) (1.7)
Gross type  Ulceroinfiltrative  Fungating	151 21	(87.8) (12.2)
Differentiation  Well to moderately differentiated  Poorly differentiated	161 11	(93.6) (6.4)
Lymphovascular invasion  Positive  Negative	25 147	(14.5) (85.5)
Neural invasion  Positive  Negative	4 168	(2.3) (97.7)
Adjuvant treatment  Chemotherapy alone  Radiotherapy alone  Both chemotherapy and radiotherapy  None	79 0 44 49	(45.9) (0.0) (25.6) (28.5)