Table 1.
Kaplan-Meier analysis for clinical and anatomic predictors of patency rate after percutaneous transluminal angioplasty
| Variable | n | Patency rate (%) | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| 3-month | 6-month | 12-month | P | |||
| Diabetes mellitus | Present | 18 | 83.3 | 66.7 | 25.0 | 0.876 |
| Absent | 27 | 76.9 | 76.9 | 15.4 | ||
| From surgery to first PTA | <12 months | 20 | 76.9 | 61.5 | 7.7 | 0.139 |
| ≥12 months | 25 | 88.9 | 61.1 | 27.8 | ||
| Thrombosis | Present | 24 | 81.3 | 62.5 | 25.0 | 0.886 |
| Absent | 21 | 88.2 | 64.7 | 23.5 | ||
| Graft shape | U-shaped | 36 | 88.5 | 65.4 | 30.8 | 0.313 |
| Straight | 9 | 71.4 | 57.1 | 0.0 | ||
| Anastomosis type | FE-FE | 30 | 83.3 | 58.3 | 20.8 | 0.654 |
| FE-SA | 15 | 88.9 | 77.8 | 33.3 | ||
| Stenosis location | Central* | 8 | 87.5 | 50.0 | 25.0 | 0.339 |
| Peripheral | 37 | 84.0 | 68.0 | 24.0 | ||
| Stenosis length | ≤2 cm | 17 | 80.0 | 50.0 | 20.0 | 0.654 |
| >2 cm | 28 | 90.5 | 71.4 | 28.6 | ||
| Stenosis severity | <70% | 20 | 81.8 | 72.7 | 18.2 | 0.347 |
| ≥70% | 25 | 90.0 | 60.0 | 30.0 | ||
| Stent insertion | Present | 9 | 88.9 | 44.4 | 0.0 | 0.016 |
| Absent | 36 | 83.3 | 70.8 | 33.3 | ||
PTA, percutaneous transluminal angioplasty; FE-FE, femoral-femoral type; FE-SA, femoral-saphenous type.
*
External iliac vein or common iliac vein.