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Table 1: Plaque characteristics
Culprit (n = 36) Nonculprit (n = 44) P Values
Plaques (%) (No.) 
 MCA 50 (18) 40.9 (18) 
 ICA 13.9 (5) 20.5 (9) 
 ACA 0 13.6 (6) 
 Basilar artery 19.4 (7) 4.5 (2) 
 PCA 2.8 (1) 20.5 (9) 
 VA 13.9 (5) 0 (0) 
Morphology 
 Concentric (%) (No.) 72 (26) 20 (9) <.001^{^a}
 Stenosis (%) (mean) 46 (SD, 21) 31 (SD, 15) .001^{^a}
 PB (%) (mean) 85 (SD, 13) 65 (SD, 14) <.001^{^a}
 RI (mean) 0.37 (SD, 0.27) 0.65 (SD, 0.22) <.001^{^a}
 Area of stenosis (%) (mean) 64 (SD, 24) 35 (SD, 22) <.001^{^a}
 IPH (%) (No.) 11 (4) 0 (0) .025^{^a}
Enhancement
 Mean enhancement ratio plaque^{^b} 0.80 (SD, 0.30) 0.61 (SD, 0.17) .004^{^a}
 Plaque enhancement variance 0.33 (SD, 0.13) 0.26 (SD, 0.08) .041^{^a}
 Gd uptake 2.01 (SD, 0.91) 1.06 (SD, 0.76) <.001^{^a}
 Mean enhancement ratio parent vessel^{^b} 0.59 (SD, 0.20) 0.62 (SD, 0.14) .62
Plaque vs arterial enhancement 0.99 (SD, 0.94) –0.02 (SD, 0.48) <.001^{^a}
Note:—ACA indicates anterior cerebral artery; PCA, posterior cerebral artery; VA, vertebral artery.
↵a P < .05.
↵b Reported as mean SI.