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Table 1 The clinicopathological characteristics of enrolled patients in the overall and training cohort

From: Peritoneal cell-free DNA as a sensitive biomarker for detection of peritoneal metastasis in colorectal cancer: a prospective diagnostic study

Ā 

Overall (nā€‰=ā€‰40)

CRC with PM (nā€‰=ā€‰17)

CRC without PM (nā€‰=ā€‰23)

P value

Gender

Female

25 (62.5)

13 (76.5)

12 (52.2)

0.187

Male

15 (37.5)

4 (23.5)

11 (47.8)

Ā 

Age

Mean(SD)

53.73 (10.50)

51.53 (11.81)

55.35 (9.35)

0.33

Histological type

Adenocarcinoma

35 (87.5)

16 (94.1)

19 (82.6)

0.624

Mucinous adenocarcinoma

3 (7.5)

1 (5.9)

2 (8.7)

Ā 

Signet ring cell carcinoma

2 (5.0)

0 (0.0)

2 (8.7)

Ā 

Location

Left

28 (70.0)

9 (52.9)

19 (82.6)

0.079

Right

12 (30.0)

8 (47.1)

4 (17.4)

Ā 

Alcohol tobacco

No

36 (90.0)

14 (82.4)

22 (95.7)

0.294

Yes

4 (10.0)

3 (17.6)

1 (4.3)

Ā 

TNM_T

T1

2 (5.0)

0 (0.0)

2 (8.7)

<ā€‰0.001

T2

1 (2.5)

0 (0.0)

1 (4.3)

Ā 

T3

23 (57.5)

5 (29.4)

18 (78.3)

Ā 

T4

10 (25.0)

9 (52.9)

1 (4.3)

Ā 

Tis

1 (2.5)

0 (0.0)

1 (4.3)

Ā 

Tx

3 (7.5)

3 (17.6)

0 (0.0)

Ā 

TNM_N

N0

20 (50.0)

6 (35.3)

14 (60.9)

0.154

N1

10 (25.0)

5 (29.4)

5 (21.7)

Ā 

N2

7 (17.5)

3 (17.6)

4 (17.4)

Ā 

Nx

3 (7.5)

3 (17.6)

0 (0.0)

Ā 

TNM_M

M0

18 (45.0)

0 (0.0)

18 (78.3)

<ā€‰0.001

M1

22 (55.0)

17 (100.0)

5 (21.7)

Ā 

MSI status

MSI-H

1 (2.5)

0 (0.0)

1 (4.3)

1.0

MSS

39 (97.5)

17 (100.0)

22 (95.7)

Ā 

TMB in TIS

Mean(SD)

5.43 (7.13)

3.93 (1.75)

6.55 (9.21)

0.294

PCI scores

Mean(SD)

7.40 (11.38)

17.41 (11.42)

0.00 (0.00)

<ā€‰0.001

CA125 (ng/ml)

Median[IQR]

19.40 (10.47,34.17)

35.00 (10.50, 102.20)

14.50 (10.95, 20.55)

0.027

CA199 (ng/ml)

0.016

Median[IQR]

16.00[7.02, 47.60]

45.17[10.26, 208.21]

9.89[4.32, 26.75]

Ā 

CEA (ng/ml)

0.103

Median[IQR]

7.91[3.07, 22.14]

10.84[4.14, 43.00]

6.11[2.88, 12.31]

Ā