Table 3. Treatment Modalities and Characteristics of Stent.
| Total (n=130) | Success (n=73) | Failure (n=57) | p value | ||
|---|---|---|---|---|---|
| Stent type | |||||
| Natural stent | 91 (70.0) | 51 (69.9) | 40 (70.2) | 0.969 | |
| Dumon stent | 35 (26.9) | 21 (28.8) | 14 (24.6) | 0.592 | |
| Montgomery t-tube | 3 (2.3) | 1 (1.4) | 2 (5.3) | 0.319 | |
| Stent length, mm | 45 (40–50) | 45 (40–50) | 50 (43–50) | 0.001 | |
| Stent length <50 mm | 66 (50.8) | 47 (64.4) | 19 (33.3) | <0.001 | |
| Duration of stenting, day | 448 (253–833) | 454 (246–890) | 436 (240–811) | 0.583 | |
| Duration of stent >1 year | 81 (62.8) | 46 (63.0) | 35 (61.4) | 0.851 | |
| Duration of stent >18 months | 54 (41.5) | 31 (42.5) | 23 (40.4) | 0.808 | |
| Additional intervention before stent removal* | 45 (34.6) | 22 (30.1) | 23 (40.4) | 0.225 | |
| Air pocket in CT before stent removal (n=106)† | |||||
| Air pocket length, mm | 32.5 (27.5–40.0) | 34.0 (27.8–41.0) | 32.5 (26.3–37.5) | 0.345 | |
| Air pocket score | 26 (20–36) | 25 (20–35) | 26 (20–35) | 0.522 | |
| Air pocket density‡ | 0.57 (0.38–0.80) | 0.56 (0.39–0.87) | 0.58 (0.38–0.73) | 0.235 | |
Data are presented as n (%) or median (interquartile range).
*Reasons for additional interventions included stent migration (n=25), granulation tissue overgrowth (n=16), additional stenosis (n=8), mucostasis (n=3), and malacia (n=2). Nine patients had more than one reason; †24 patients did not have available CT scans before stent removal; ‡Air pocket score/stent length.