TABLE 2.
Analysis of Recurrent Cerebral Ischemic Events in Symptomatic Patients with ≥50% Carotid Artery Stenosis
| Adjusted for Risk Factorsa | ||||||
|---|---|---|---|---|---|---|
| Events, No. | PY | Event Rate per 100 PY | Annual Risk | Hazard Ratio (95% CI) | p | |
| Ipsilateral recurrent stroke, TIA or AmF | ||||||
| MRIPH+ | 57 | 94.6 | 60.2 | 45.2% | 11.95 (4.8–30.1) | <0.001 |
| MRIPH− | 5 | 156.7 | 3.2 | 3.1% | 1.0 | |
| Ipsilateral recurrent stroke | ||||||
| MRIPH+ | 25 | 94.6 | 26.4 | 23.2% | 35.0 (4.7–261.6) | 0.001 |
| MRIPH− | 1 | 156.7 | 0.64 | 0.6% | 1.0 | |
a
Adjusted for age, sex, degree of carotid stenosis, and known vascular risk factors as described in Patients and Methods.
AmF = amaurosis fugax; CI = confidence interval; MRI = magnetic resonance imaging; MRIPH− = absence of hyperintense signal on MRI; MRIPH+ = presence of hyperintense signal on MRI; PY = person years; TIA = transient ischemic attack.