Table 3 Results of the univariate and multivariate analyses of risk factors for biliary obstruction after DSP in the descending duodenum
| Â | n | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|
OR (95% CI) | P-value | OR (95% CI) | P-value | ||
Age (years) | |||||
 ≤ 64 | 22 | 0.44 (0.08–2.26) | 0.32 |  |  |
 > 64 | 43 | 1 |  |  |  |
Sex | |||||
 Female | 27 | 2.43 (0.61–9.63) | 0.21 |  |  |
 Male | 38 | 1 |  |  |  |
Tumor diagnosis | |||||
 Pancreatic cancer | 37 | 1.16 (0.29–4.58) | 0.83 |  |  |
 Other | 28 | 1 |  |  |  |
Extrahepatic bile duct dilatation | |||||
 Yes | 21 | 0.89 (0.20–3.81) | 0.87 |  |  |
 No | 44 | 1 |  |  |  |
Biliary stents | |||||
 No | 31 | 5.57 (1.08–28.70) | 0.04* | 8.54 (1.54–47.30) | 0.01* |
 Yes | 34 | 1 |  | 1 |  |
Tumor invasion to the major duodenal papilla | |||||
 Yes | 42 | 6.00 (0.71–50.70) | 0.10 | 10.10 (1.10–91.90) | 0.04* |
 No | 23 | 1 |  | 1 |  |
Position of duodenum covered by duodenal stents | |||||
 1st-3rd | 16 | 2.39 (0.58–9.86) | 0.23 |  |  |
 Others | 49 | 1 |  |  |  |
Types of duodenal stent | |||||
 Covered | 6 | 1.11 (0.12–10.70) | 0.93 |  |  |
 Uncovered | 59 | 1 |  |  |  |