Table 3.
Baseline characteristics of the restenosis and non-restenosis group
| Characteristics | Restenosis group (N = 29) | Non-restenosis group (N = 48) |
|---|---|---|
| Gender | ||
| Male (%) | 7 (24.1) | 12 (25.0) |
| Female (%) | 22 (75.9) | 36 (75.0) |
| Age (mean ± SD, years) | 30.31 ± 8.99 | 34.25 ± 11.49 |
| Location | ||
| Left main bronchus (%) | 26 (89.7) | 39 (81.3) |
| Right main bronchus (%) | 2 (6.9) | 5 (10.4) |
| Bronchus intermedius (%) | 1 (3.4) | 4 (8.3) |
| Stent involved | ||
| SEMS (Nanjing Micro-Tech, China) (%) | 19 (65.5) | 26 (54.2) |
| Ultraflex SEMS (Boston Scientific, USA) (%) | 10 (34.5) | 22 (45.8) |
| Stenosis type | ||
| Scarring (%) | 10 (34.5) | 20 (41.7) |
| Bronchomalacia (%) | 2 (6.9) | 13 (27.1) |
| Mixed (%) | 13 (44.8) | 13 (27.1) |
| Bronchial atresia (%) | 4 (13.8) | 2 (4.1) |
| Number of pre-stenting interventions | 164 | 179 |
| Thermal ablation | 34 (20.7) | 26 (14.5) |
| Balloon dilation | 124 (75.6) | 153 (85.5) |
| Cryotherapy | 6 (3.7) | 0 (0.0) |
| Median duration of implantation (mean ± SD, months) | 132.38 ± 64.05 | 164.17 ± 44.00 |
| Neo-epithelialization (%) | 16 (55.2) | 41 (85.4) |
| Complications | ||
| Granulation tissue (%) | 26 (89.7) | 23 (47.9) |
| Scarring tissue (%) | 15 (51.7) | 3 (6.3) |
| Sputum retention (%) | 3 (10.3) | 2 (4.2) |
| Necrotic tissue (%) | 0 (0.0) | 1 (2.1) |
| Stent breakage (%) | 0 (0.0) | 2 (4.2) |
| Infection (%) | 0 (0.0) | 1 (2.1) |
| Outcomes | ||
| Stability (%) | 4 (13.8) | 45 (93.8) |
| Still under treatment (%) | 12 (41.4) | 0 (0.0) |
| Bronchial atresia (%) | 11 (37.9) | 0 (0.0) |
| Surgery (%) | 9 (81.8) | 0 (0.0) |
| Lost follow-up (%) | 2 (6.9) | 3 (6.2) |