|
Variable
|
Training cohort (n = 411)
|
External validation cohort (n = 436)
|
|---|
|
N0 [cases (%)]
|
N + [cases (%)]
|
χ2
|
P
|
N0 [cases (%)]
|
N + [cases (%)]
|
χ2
|
P
|
|---|
|
Lymphovascular embolization
| | |
12.12
|
< 0.001
| | |
61.32
|
< 0.001
|
|
Yes
|
30 (42.9)
|
40 (57.1)
| | |
49 (52.7)
|
44 (47.3)
| | |
|
No
|
222 (65.1)
|
119 (35.0)
| | |
304 (88.7)
|
39 (11.3)
| | |
|
Perineural invasion
| | |
11.20
|
< 0.001
| | |
1.54
|
0.214
|
|
Yes
|
23 (41.1)
|
33 (58.9)
| | |
49 (72.1)
|
16 (27.9)
| | |
|
No
|
229 (64.5)
|
126 (35.5)
| | |
304 (81.9)
|
67 (18.1)
| | |
|
Pathological grade
| | |
16.12
|
< 0.001
| | |
2.89
|
0.069
|
|
G1–2
|
243 (64.1)
|
136 (35.9)
| | |
272 (82.9)
|
56 (17.1)
| | |
|
G3
|
9 (28.1)
|
23 (71.9)
| | |
81 (75.0)
|
27 (25.0)
| | |
