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Table 1: 
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 lesions5 (20.8)2 (9.5).42
Any proximal lesion† regardless of whether distal lesion22 (87.5)18 (85.7).28
Distal lesion only2 (8.3)3 (14.3).18
Anterior circulation only‡19 (79.2)15 (71.4).36
Posterior circulation only2 (8.3)3 (14.3)1.00
Anterior and posterior3 (12.5)3 (14.3)1.00
Ipsilateral ≥ 2 lesions§16 (66.7)16 (76.2)1.00
Total lesions ≥ 53 (12.5)4 (19.0).29
Benign appearance19 (79.2)16 (76.2).50
Aggressive appearance5 (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.