Table 3.
Comparison of stent thrombosis and non-stent thrombosis groups
| ST (n=26)** | No-ST (n=578) | p-value*** | |
|---|---|---|---|
| Baseline characteristics | |||
| Age (years) | 64.2±9.4 | 62.4±6.8 | 0.204 |
| Male | 25 (96.2%) | 474 (82.0%) | 0.063 |
| Caucasian | 19 (70.4%) | 376 (65.2%) | |
| Black | 7 (25.9%) | 180 (25.7%) | 0.924 |
| Hispanic | 1 (3.7%) | 56 (8.3%) | |
| Diabetes mellitus | 13 (50.0%) | 315 (54.5%) | 0.652 |
| Hyperlipidemia | 23 (88.5%) | 501 (86.7%) | 0.722 |
| Hypertension | 23 (88.5%) | 536 (92.7%) | 0.418 |
| Current smoker | 18 (69.2%) | 351 (60.7%) | 0.385 |
| Coronary artery disease | 20 (76.9%) | 382 (66.09%) | 0.253 |
| Prior myocardial infarction | 11 (42.3%) | 162 (28.0%) | 0.115 |
| Prior stroke | 1 (3.8%) | 55(9.5%) | 0.329 |
| Heart failure | 6 (23.1%) | 103 (17.8%) | 0.495 |
| Chronic kidney disease | 2 (7.4%) | 94 (16.3%) | 0.177 |
| Ankle brachial index | 0.56±0.27 | 0.53±0.41 | 0.553 |
| Rutherford category | |||
| Rutherford 2 | 1 (3.9%) | 35 (6.1%) | 0.6687 |
| Rutherford 3 | 18 (69.2%) | 382 (66.5%) | |
| Rutherford 4 | 7 (26.9%) | 62 (10.8%) | |
| Rutherford 5 | 0 (0%) | 69 (12.0%) | |
| Critical limb ischemia* | 7 (25.9%) | 131 (22.7%) | 0.701 |
| Dual antiplatelet therapy | 22 (81.5%) | 523 (90.6%) | 0.155 |
| Index procedure characteristics | |||
| Superficial femoral artery | 27 (92.6%) | 528 (91.7%) | 1.000 |
| Popliteal artery | 2 (7.7%) | 48 (8.3%) | 0.910 |
| Ostial SFA lesion | 6 (23.1%) | 81 (14.0%) | 0.199 |
| Distal SFA lesion | 3 (11.5%) | 140 (24.2%) | 0.133 |
| Lesion length (mm) | 171.0±86.9 | 126.8±99.9 | 0.011 |
| Chronic total occlusion | 23 (88.5%) | 370 (64.0%) | 0.010 |
| In stent restenosis | 5 (19.2%) | 35 (6.1%) | 0.008 |
| BTK vessel runoff | 2.50±0.71 | 2.26±0.81 | 0.714 |
| Bare metal stents | 15 (55.6%) | 431 (74.8%) | 0.041 |
| Supera™ mimetic stents | 3 (11.1%) | 40 (6.9%) | 0.441 |
| Viabahn™ stent grafts | 6 (22.2%) | 41 (7.1%) | 0.016 |
| Zilver PTX™ drug coated stents | 3 (11.1%) | 64 (11.1%) | 1.000 |
| Stent length (mm) | 246.2±124.8 | 194.7±124.7 | 0.035 |
| Atherectomy | 8 (30.8%) | 141 (24.4%) | 0.461 |
| Procedure success | 25 (96.2%) | 566 (98.4%) | 0.374 |
BTK – below the knee vessels, SFA – superficial femoral artery, ST – stent thrombosis
*
Includes Rutherford category 4 and 5
**
If patients had multiple stent procedures and experienced at least one ST following any of stent procedures, the individual patient was counted as having had ST.
***
Wilcoxon rank sum test for continuous variables; Cochran-Mentel-Haenszel test for categorical variables