Table 3:
Performance of MRI variables as predictors of recurrent transient ischemic attack or stroke at 7 days among 129 patients evaluated within 24 hours of symptom onset
| Sensitivity (%) (No.) | Specificity (%) (No.) | Positive Predictive Value (%) (No.) | Negative Predictive Value (%) (No.) | Odds Ratio (95% Confidence Interval) | P Value | |
|---|---|---|---|---|---|---|
| DWI | 33.3 (3/9) | 67.5 (81/120) | 7.1 (3/42) | 93.1 (81/87) | 1.03 (0.24–4.37) | 1 |
| MRA | 33.3 (3/9) | 89.2 (107/120) | 18.8 (3/16) | 94.7 (107/113) | 4.11 (0.91–18.4) | .08 |
| MRA proximal | 33.3 (3/9) | 93.3 (112/120) | 27.3 (3/11) | 94.9 (112/118) | 7.0 (1.47–33.3) | .03 |
Note:—DWI indicates acute infarction on DWI; MRA, distal or proximal stenosis or occlusion of symptomatic intracranial artery on MR angiography; MRA proximal, proximal stenosis or occlusion of symptomatic intracranial artery on MR angiography.