Evaluation of clinical significance of claudin 7 and construction of prognostic grading system for stage II colorectal cancer

Table 1 Clinicopathological features of the patients with stage II colorectal cancer, n (%)

Variable	No. of patients
Age in yr
Median (range)	60 (30-79)
≤ 60	124 (53.7)
> 60	107 (46.3)
Gender
Male	140 (60.6)
Female	91 (39.4)
CEA level
Negative	119 (51.5)
Positive	54 (23.4)
Unknown	58 (25.1)
Tumor location
Colon	130 (56.3)
Rectum	101 (43.7)
Tumor differentiation
Well/moderate	209 (90.5)
Poor	22 (9.5)
T stage
T3	189 (81.8)
T4	42 (18.2)
Lymphovascular invasion
Negative	200 (86.6)
Positive	31 (13.4)
Perineural invasion
Negative	191 (82.7)
Positive	40 (17.3)
Postoperative chemotherapy
No	147 (63.6)
Yes	84 (36.4)
Recurrence
No	204 (88.3)
Yes	27 (11.7)

CEA: Carcinoembryonic antigen.