Table 2. Stent placement for patients with Klatskin tumor.
| Factors | Above stent | Across stent | P value |
| Number of patients | 17 | 23 | |
| Number of stents (1/2) | 8/9 (47.1/52.9) | 19/4 (82.6/17.4) | 0.0170 |
| Stent to operation (days) | 139.4 | 141.6 | 0.8818 |
| Post-procedure pancreatitis 17 | 2/15 (11.8/88.2) | 1/22 (4.3/95.7) | 0.3916 |
| Emergency ERCP | 14/3 (82.4/17.6) | 22/1 (87.5/12.5) | 0.1743 |
| 1) Stent occlusion | 6/11(35.3/64.7) | 13/11 (56.5/48.5) | 0.6124 |
| 2) Stent dislocation | 2/15 (11.8/81.2) | 7/16 (30.4 /69.6) | 0.1704 |
| 3) Reflux cholangitis | 2/15 (11.8/81.2) | 5/23 (21.7/78.3) | 0.424 |
| 4) Undrained area cholangitis | 5/12 (29.4/70.6) | 15/8 (65.2/34.8) | 0.0250 |
| Stent patency > 90 days | 11/6 (60.9/39.1) | 1/22 (12.5/87.5) | < 0.0001 |
| Stent patency (days) | 99.8 | 31.0 | < 0.0001 |
Above stent: stent placed above the sphincter of Oddi Across stent: stent placed across the sphincter of OddiERCP, endoscopic retrograde cholangiopancreatography( ): %