Table 2.
HRMRI Features of the Two Groups
| Total n=145 |
Stroke group n=79 |
Non-stroke group n=66 |
P value | |
|---|---|---|---|---|
| Anterior circulation, No. (%) | 67(46.2) | 43 (54.4) | 24 (36.4) | 0.030 |
| Extracranial, No. (%) | 117(80.7) | 65 (82.3) | 52 (78.8) | 0.596 |
| Double lumen, No. (%) | 25(17.2) | 10 (12.7) | 15 (22.7) | 0.110 |
| Intimal flap, No. (%) | 49(33.8) | 24 (30.4) | 25 (37.9) | 0.342 |
| Intramural hematoma, No. (%) | 132(91.0) | 76 (96.2) | 56 (84.8) | 0.017 |
| Pseudoaneurysm, No. (%) | 27(18.6) | 9 (11.4) | 18 (27.3) | 0.014 |
| Irregular surface, No. (%) | 84(57.9) | 59 (74.7) | 25 (37.9) | < 0.001 |
| Intraluminal thrombus, No. (%) | 38(26.2) | 35 (44.3) | 3 (4.5) | < 0.001 |
| Length, mean (SD), cm | 4.4(2.8) | 4.5 (2.6) | 4.3 (3.1) | 0.767 |
| Stenosis degree | ||||
| ≤ 49% | 52(35.9) | 20 (25.3) | 32 (48.5) | 0.008 |
| 50%~69% | 29(20.0) | 16 (20.3) | 13 (19.7) | |
| 70%~100% | 64(44.1) | 43 (54.4) | 21 (31.8) | |
| Heterogeneous signal of intramural hematoma, No. (%) | 85(57.0) | 50 (63.3) | 35 (53.0) | 0.212 |
| Enhancement of intramural hematoma, mean (SD), % | 120(35) | 118 (29) | 122 (43) | 0.603 |
Abbreviations: HRMRI, high resolution magnetic resonance imaging;