|
Variable
|
Open (N = 149)
|
Laparoscopy (N = 300)
|
p value
|
|---|
|
Tumor size (cm)
|
6 (2–30)
|
5.2 (0.9–14.5)
|
< .001a
|
|
Node state
|
N0
|
53 (35.6)
|
85 (28.3)
|
0.118b
|
|
N+
|
96 (64.4)
|
215 (71.7)
|
|
T stage
|
T4a
|
85 (57.0)
|
248 (82.7)
|
< .001b
|
|
T4b
|
64 (43.0)
|
52 (17.3)
|
|
Angiolymphatic invasion
|
Not identified
|
85 (57.0)
|
78 (26.0)
|
< .001b
|
|
Present
|
64 (43.0)
|
222 (74.0)
|
|
Venous invasion
|
Not identified
|
97 (65.1)
|
150 (50.0)
|
0.003b
|
|
Present
|
52 (34.9)
|
150 (50.0)
|
|
Perineural invasion
|
Not identified
|
56 (37.6)
|
66 (22.0)
|
0.001b
|
|
Present
|
93 (62.4)
|
234 (78.0)
|
|
Combined resection
|
No
|
107 (71.8)
|
282 (94.0)
|
< .001b
|
|
Yes
|
42 (28.2)
|
18 (6.0)
|
|
R0 resection rate
|
140 (94)
|
292 (97.3)
|
0.078b
|
|
Harvested lymph nodes
|
N = 298
|
29 (5–117)
|
29 (7–244)
|
0.677a
|
|
Proximal margin
|
N = 447
|
14 (0.5–174)
|
10.7 (1.5–119.8)
|
0.004a
|
|
Distal margin
|
8 (0–125.5)
|
8.3 (0.4–101)
|
0.532a
|
|
Radial margin
|
N = 100
|
0.4 (0–8.5)
|
0.4 (0–4)
|
0.895a
|
- aWilcoxon rank sum test
- bChi-square test
- Data are expressed as median (range) for continuous variables and as number (percentage) for categorical variables
