Table 3.

HRMRI Features of the Two Groups

	Univariate logistic regression			Multivariate logistic regression
	OR	95% CI	P value	OR	95% CI	P value
Anterior circulation	2.090	1.071, 4.081	0.031*	1.837	0.788, 4.284	0.159
Extracranial	1.250	0.547, 2.854	0.596
Double lumen	0.493	0.205, 1.186	0.114
Intimal flap	0.716	0.359, 1.428	0.342
Intramural hematoma	3.348	0.998, 11.229	0.050*	4.045	0.790, 20.725	0.094
Pseudoaneurysm	0.343	0.142, 0.827	0.017*	0.485	0.136, 1.736	0.266
Irregular surface	4.838	2.378, 9.843	<0.001*	4.289	1.605, 11.462	0.004
Intraluminal thrombus	16.705	4.832, 57.746	<0.001*	7.476	1.640, 34.074	0.009
Length	1.018	0.906, 1.144	0.765
Stenosis degree			0.010*			0.572
50%~69%	1.969	0.784, 4.945	0.149	1.251	0.403, 3.881	0.698
70%~100%	3.276	1.525, 7.037	0.002	0.687	0.227, 2.077	0.506
Heterogeneous signal of intramural hematoma	1.527	0.785, 2.971	0.212
Enhancement of intramural hematoma	0.654	0.220, 1.948	0.446

Abbreviations: HRMRI, high resolution magnetic resonance imaging; OR, odds ratio; CI, confidence interval.