Comparative detection of syndecan-2 methylation in preoperative and postoperative stool DNA in patients with colorectal cancer

Table 1 Characteristics of patients

	Patients with preoperative or postoperative stool sampling, n = 147 (%)	Patients with preoperative and postoperative stool sampling, n = 104 (%)
Sex
Male	97 (66.0)	66 (63.5)
Female	50 (34.0)	38 (36.5)
Age, yr
Mean (range)	62.3 (35-80)	62.8 (35-80)
Tumor location
Right colon	45 (30.6)	29 (27.9)
Left colon	62 (42.2)	51 (49.0)
Rectum	40 (27.2)	24 (23.1)
Histology
WD	6 (4.1)	4 (3.8)
MD	132 (89.8)	94 (90.4)
PD	9 (3.4)	5 (4.8)
Mucinous	4 (2.7)	1 (1.0)
Tumor size, cm
Mean (range)	3.7 (0.0-15.0)	3.5 (0.0-9.0)
T stage
Tis	5 (3.4)	4 (3.8)
T1	22 (15.0)	15 (14.4)
T2	27 (18.4)	19 (18.3)
T3	74 (50.3)	52 (50.0)
T4	19 (12.9)	14 (13.5)
N stage
N0	93 (63.3)	66 (63.5)
N+	54 (36.7)	38 (36.5)
TCF before surgery
Not done	14 (9.5)	9 (8.7)
Done	133 (90.5)	95 (91.3)
RAA
Not present	129 (87.8)	90 (86.5)
Present	18 (12.2)	14 (13.5)
Recurrence
No	137 (93.2)	98 (94.2)
Yes	10 (6.8)	6 (5.8)

WD: Well differentiated; MD: Moderately differentiated; PD: Poorly differentiated; TCF: Total colonoscopy; RAA: Remnant advanced adenoma.