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Table 4 Univariate and multivariate analyses of risk factors for recurrent biliary obstruction in pancreatic cancer

From: Partially covered metal stents have longer patency than uncovered and fully covered metal stents in the management of distal malignant biliary obstruction: a retrospective study

  

Stent dysfunction (n = 41)

Univariate

Multivariate

n

 

HR

95% CI

P value

HR

95% CI

P value

Type of stent

Uncovered

34

18

1

Partially

21

7

0.27

0.11–0.69

0.006*

0.33

0.12–0.86

0.023*

Fully

25

16

0.87

0.44–1.71

0.687

0.88

0.43–1.78

0.719

Age

<75

40

20

1

≥75

40

21

1.05

0.56–1.97

0.874

Sex

Male

48

22

1

Female

32

19

1.67

0.89–3.12

0.111

1.62

0.82–3.19

0.163

Performance status

0–2

75

39

1

3,4

5

2

2.22

0.52–9.49

0.283

Location of stricture

Lower

62

31

1

Middle

18

10

0.69

0.33–1.45

0.327

Length of stricture

≤20 mm

42

18

1

>20 mm

38

23

1.71

0.92–3.20

0.092

1.33

0.67–2.64

0.418

Stent length

≤6 cm

72

37

1

8 cm

8

4

2.33

0.81–6.69

0.117

2.26

0.70–7.31

0.172

Length of a portion of the stent over the stricture

<30 mm

36

22

1

≥30 mm

44

19

0.92

0.49–1.72

0.787

Prior transpapillary drainage

No

33

13

1

Yes

47

28

0.96

0.49–1.88

0.906

History of cholecystectomy

No

75

40

1

Yes

5

1

0.60

0.08–4.36

0.610

EST

No

8

5

1

Yes

72

36

0.95

0.34–2.68

0.921

Duodenal invasion

absent

49

21

1

present

31

20

1.27

0.68–2.36

0.460

Duodenal stent

absent

65

32

1

Present

15

9

1.12

0.52–2.44

0.770

Chemotherapy

No

19

7

1

Yes

61

34

0.59

0.26–1.35

0.211

  1. HR Hazard Ratio, CI Confidence Interval, EST Endoscopic Sphincterotomy
  2. *Statistically significant at p < 0.05