All patients

(N = 117)

Training cohort (N = 64)

Validation cohort (N = 53)

P value

Age (year) (Median, QR)

60.0[55.0; 64.0]

61.0 [55.0; 65.0]

60.0[56.0; 63.0]

0.331

Gender

0.138

Female

8 (6.84%)

2 (3.12%)

6 (11.3%)

Male

109 (93.2%)

62 (96.9%)

47 (88.7%)

Tumor cell differentiation

0.013

Well differentiation

66 (56.4%)

29 (45.3%)

37 (69.8%)

Poor differentiation

51 (43.6%)

35 (54.7%)

16 (30.2%)

Maximum tumor diameter in CT

0.498

<3.6 cm

70 (59.8%)

36 (56.2%)

36 (56.2%)

≥3.6 cm

47 (40.2%)

28 (43.8%)

28 (43.8%)

LNM status in CT

0.254

No

41 (35.0%)

19 (29.7%)

22 (41.5%)

Yes

76 (65.0%)

45 (70.3%)

31 (58.5%)

Ki67 expression level

0.436

Low

43 (36.8%)

21 (32.8%)

21 (32.8%)

High

74 (63.2%)

43 (67.2%)

31 (58.5%)

STMN1 expression level

0.135

Low

37 (31.6%)

16 (25.0%)

21 (39.6%)

High

80 (68.4%)

48 (75.0%)

32 (60.4%)

Vascular invasion status

1.000

No

69 (59.0%)

38 (59.4%)

31 (58.5%)

Yes

48 (41.0%)

26 (40.6%)

22 (41.5%)

Lymph vessels invasion status

1.000

No

51 (43.6%)

28 (43.8%)

23 (43.4%)

Yes

66 (56.4%)

36 (56.2%)

30 (56.6%)

LNM in pathology

0.576

No

27 (23.1%)

13 (20.3%)

14 (26.4%)

Yes

90 (76.9%)

51 (79.7%)

39 (73.6%)