WON characteristics and procedural details
| LAMS (n=31) | Plastic (n=29) | P values | |
| WON location: n (%) | |||
| Head/uncinate | 9 (29.0) | 6 (20.7) | 0.456 |
| Body/tail | 22 (71.0) | 23 (79.3) | |
| Degree of necrosis (%): | |||
| Mean (SD) | 40.3 (15.7) | 45.3 (14.4) | 0.173 |
| Median | 40 | 50 | |
| IQR | 20 | 20 | |
| Range | 20–70 | 20–80 | |
| WON size (cm): transverse axis | |||
| Mean (SD) | 10.2 (4.6) | 10.7 (6.8) | 0.784 |
| Median | 9.2 | 7.8 | |
| IQR | 5.6 | 7.1 | |
| Range | 5.0–21.6 | 5.0–32.0 | |
| WON size (cm): anteroposterior axis | |||
| Mean (SD) | 8.6 (4.3) | 7.8 (3.8) | 0.477 |
| Median | 8.0 | 6.0 | |
| IQR | 5.9 | 3.3 | |
| Range | 2.4–20.0 | 4.0–17.0 | |
| Route of drainage: n (%) | |||
| Transesophageal | 0 | 1 (3.4) | 0.509 |
| Transgastric | 24 (77.4) | 24 (82.8) | |
| Transduodenal | 7 (22.6) | 4 (13.8)* | |
| Additional drainage tracts at index procedure with nasocystic catheter placement: n (%) | 3 (9.7) | 9 (31.0) | 0.054 |
| Pancreatic duct status: n (%) | |||
| Intact PD | 9 (29.0) | 9 (31.0) | 0.363 |
| PD leak | 6 (19.4) | 2 (6.9) | |
| DPDS | 13 (41.9) | 17 (58.6) | |
| Unknown | 3 (9.7) | 1 (3.4) | |
| Procedure duration (min): | |||
| Mean (SD) | 18.0 (15.5) | 41.6 (25.7) | |
| Median | 15 | 40 | <0.001 |
| IQR | 17 | 28 | |
| Range | 3–63 | 10–115 | |
| Technical success: n (%) | 31 (100) | 29 (100) | 0.999 |
*One patient in the plastic stent group underwent drainage via both transgastric and transduodenal routes.
DPDS, disconnected pancreatic duct syndrome; LAMS, lumen-apposing metal stent; PD, pancreatic duct; WON, walled-off necrosis.