Summary of potential risk factors studied
| Potential Risk Factors | No. of Patients | P Value* |
|---|---|---|
| Age (>60 vs ≤60 y) | 56 vs 44 | 1.0 |
| Sex (male vs female) | 78 vs 22 | .687 |
| Symptom pattern (unstable vs stable) | 27 vs 73 | .004 |
| Initial NIHSS (≥4 vs <4) | 23 vs 77 | .313 |
| Presenting symptom (stroke vs TIA) | 57 vs 43 | 1.0 |
| Time from symptom onset (>7 vs ≤7 day) | 70 vs 30 | .482 |
| Lesion location (anterior vs posterior) | 69 vs 31 | .277 |
| Degree of stenosis (≥70% vs <70%) | 49 vs 51 | .049 |
| Length of stenosis (≥7 vs <7 mm) | 59 vs 41 | .520 |
| Residual stenosis (≥20% vs <20%) | 59 vs 41 | .086 |
| Presence of diabetes | 33 | 1.0 |
| Presence of hypertension | 71 | .273 |
| Presence of hyperlipidemia | 26 | .281 |
| Presence of smoking history | 36 | .323 |
| Presence of cardiac disease | 15 | 1.0 |
| Presence of previous stroke | 32 | .722 |
| Level of C-reactive protein (≥0.2 mg/dL) | 48 | .154 |
| Level of homocysteine (≥15 μmol/L) | 28 | .426 |
Note:—TIA indicates transient ischemic attack; NIHSS, National Institutes of Health Stroke Scale.
* Association between adverse event and each independent factor tested by Fisher exact test.