|
Factor
|
Lymph node count
|
P
b
|
|---|
|
<12 (n = 179)
|
≥12 (n = 483)
|
|---|
|
Gender
| | |
0.171
|
|
Female
|
79 (44)
|
184 (38)
|
|
Male
|
100 (56)
|
299 (62)
|
|
Age
| | |
0.125
|
|
<70 years
|
161 (90)
|
401 (83)
| |
|
≥70 years
|
18 (10)
|
82 (17)
|
|
Cancer site
| | |
0.225
|
|
Pancreas
|
88 (49)
|
300 (62)
|
|
Ampulla of Vater
|
79 (44)
|
157 (33)
|
|
Common bile duct
|
12 (7)
|
26 (5)
|
|
Comorbidities
| | |
0.893
|
|
No
|
90 (50)
|
237 (49)
|
|
Yes
|
89 (50)
|
246 (51)
|
|
ASA class
| | |
0.259
|
|
I or II
|
134 (75)
|
336 (70)
|
|
III or IV
|
45 (25)
|
147 (30)
|
|
Preoperative biliary drainage
| | |
0.179
|
|
No
|
107 (60)
|
257 (53)
|
|
Yes
|
72 (40)
|
226 (47)
|
|
Body mass index
| | |
0.006
|
|
<25
|
91 (51)
|
314 (65)
|
|
≥25
|
88 (49)
|
169 (35)
|
|
Tumor diameter
| | |
<0.001
|
|
<20 mm
|
66 (37)
|
101 (21)
|
|
≥20 mm
|
113 (63)
|
382 (79)
|
|
Lymph node metastases
| | |
0.001
|
|
No
|
111 (62)
|
155 (32)
|
|
Yes
|
68 (38)
|
328 (68)
|
|
Pathologist
| | |
0.767
|
|
Single
|
159 (89)
|
425 (88)
|
|
Various
|
20 (11)
|
58 (12)
|
|
Type of resectiona
| | |
0.001
|
|
Pancreatoduodenectomy (PD)
|
102 (57)
|
362 (75)
|
|
Pylorus-reserving PD
|
77 (43)
|
121 (25)
|
|
Lymphadenectomy
| | |
0.001
|
|
Standard
|
156 (87)
|
328 (68)
|
|
Radical
|
23 (13)
|
155 (32)
|
-
aIncluding total pancreatectomy with resection of the distal stomach (classified as PD) and without (pylorus-preserving PD)
-
bChi-square test; numbers in parentheses are percentages
