|
Variable
|
Open (N = 29)
|
Laparoscopy (N = 88)
|
p value
|
|---|
|
Tumor size (cm)
|
3.5 (2–4)
|
3.4 (0.9–4)
|
0.208a
|
|
Node state
|
N0
|
7 (24.1)
|
22 (25.0)
|
0.926b
|
|
N+
|
22 (75.9)
|
66 (75.0)
|
|
T stage
|
T4a
|
26 (89.7)
|
85 (96.6)
|
0.161c
|
|
T4b
|
3 (10.3)
|
3 (3.4)
|
|
Angiolymphatic invasion
|
Not identified
|
18 (62.1)
|
20 (22.7)
|
< .001b
|
|
Present
|
11 (37.9)
|
68 (77.3)
|
|
Venous invasion
|
Not identified
|
19 (65.5)
|
50 (56.8)
|
0.409b
|
|
Present
|
10 (34.5)
|
38 (43.2)
|
|
Perineural invasion
|
Not identified
|
7 (24.1)
|
11 (12.5)
|
0.146c
|
|
Present
|
22 (75.9)
|
77 (87.5)
|
|
Combined resection
|
No
|
27 (93.1)
|
86 (97.7)
|
0.256c
|
|
Yes
|
2 (6.9)
|
2 (2.3)
|
|
R0 resection rate
|
29 (100)
|
88 (100)
|
-
|
|
Harvested lymph nodes
|
N = 83
|
18 (8–60)
|
25 (7–107)
|
0.057a
|
|
Proximal margin
|
N = 116
|
8.5 (2–43)
|
10.1 (1.5–48)
|
0.198a
|
|
Distal margin
|
5.5 (0–27.5)
|
7.5 (0.4–50)
|
0.241a
|
|
Radial margin
|
N = 10
|
1.4 (0.4–2.3)
|
1.1 (0.1–4)
|
0.896a
|
- aWilcoxon rank sum test
- bChi-square test
- cFisher’s exact test
- Data are expressed as median (range) for continuous variables and as number (percentage) for categorical variables
