Demographic distribution of abnormality in patients with abnormal MRA and CA
| MRA Patients (%) | CA Patients (%) | P Value | |
|---|---|---|---|
| Unilateral lesions* | 19 (79.2) | 19 (90.5) | 1.0 |
| Bilateral lesions | 5 (20.8) | 2 (9.5) | .42 |
| Any proximal lesion† regardless of whether distal lesion | 22 (87.5) | 18 (85.7) | .28 |
| Distal lesion only | 2 (8.3) | 3 (14.3) | .18 |
| Anterior circulation only‡ | 19 (79.2) | 15 (71.4) | .36 |
| Posterior circulation only | 2 (8.3) | 3 (14.3) | 1.00 |
| Anterior and posterior | 3 (12.5) | 3 (14.3) | 1.00 |
| Ipsilateral ≥ 2 lesions§ | 16 (66.7) | 16 (76.2) | 1.00 |
| Total lesions ≥ 5 | 3 (12.5) | 4 (19.0) | .29 |
| Benign appearance | 19 (79.2) | 16 (76.2) | .50 |
| Aggressive appearance | 5 (20.8) | 5 (23.8) | 1.00 |
Note:— MRA indicates MR angiography; CA, conventional angiography. Twenty-one CA and 24 MRA studies were abnormal and compared in 25 patients.
* Unilateral vs bilateral, P <0.05.
† Proximal vs distal, P = .08.
‡ Anterior vs posterior, P = .06.
§ Multifocal vs unifocal, P = .09.