Results of multiple logistic regression analysis
| Event | Factor | OR | 95% CI | p Value |
|---|---|---|---|---|
| Symptomatic ischemic events | Posterior location | 17.5 | 1.99 to 154 | 0.01 |
| Operation time (h) | 2.34 | 1.11 to 4.93 | 0.03 | |
| MRI–DWI new lesion ≥5 mm | Low response to clopidogrel | 3.35 | 1.53 to 7.32 | 0.002 |
| Current smoker | 3.29 | 1.40 to 7.74 | 0.006 | |
| Posterior location | 2.59 | 1.10 to 6.14 | 0.03 | |
| Neck size (mm) | 1.35 | 1.15 to 1.58 | <0.001 |
DWI, diffusion weighted imaging.