Table 1 Sixteen variables examined association with PV stent occlusion. (Location: After the sub-heading “Definitions and data collection” in the Materials and Methods)

1

Sex

2

Age at the time of PV stent placement (< 65 years old or ≥ 65 years old)

3

Underlying disease (pancreas cancer or other malignancy)

4

PV resection (performed or not)

5

Neoadjuvant radiotherapy (performed or not)

6

Etiology of PV stenosis (benign or malignant)

7

Degree of stenosis (stenosis or occlusion)

8

Lesion length (> 4 cm or ≤ 4 cm))

9

Interval between surgery and stent placement (≤ 100 days or > 100 days)

10

Approach (transhepatic or tran-ileocecal vein)

11

Hepatopetal collateral vein visualization before stent placement (absent or not)

12

Hepatofugal collateral vein visualization before stent placement (absent or not)

13

Hepatopetal collateral vein visualization after stent placement (absent or not)

14

Hepatofugal collateral vein visualization after stent placement (absent or not)

15

Post-procedural anticoaglants (absent or not)

16

Residual stenosis ≥ 30% after stent placement (absent or not)