Preoperative computed tomography-based risk stratification model validation for postoperative pancreatic ductal adenocarcinoma recurrence

Table 2 Risk score for factors associated with recurrence-free survival of patients with resectable pancreatic ductal adenocarcinoma

Parameters	Score
Tumor size in cm
≤ 2	0
2-4	1
≥ 4	2
Tumor density in portal venous phase
Isodense/hyperdense	0
Hypodense	1
Tumor necrosis
No	0
Yes	2
Peripancreatic tumor infiltration
No	0
Yes	1
Suspicious metastatic lymph nodes
No	0
Yes	2