Value of superb micro-vascular imaging in predicting ischemic stroke in patients with carotid atherosclerotic plaques

Table 1 Comparison of clinical baseline data between the two groups, n (%)

	Stroke group (n=43)	Non-stroke group (n=82)	X2/t/Z	P
Gender, male (%)	25 (58.14)	46 (56.10)	0.018	0.892
Age	70.04 ± 10.82	67.06 ± 8.59	1.672	0.095
Triglyceride (mmol/L)	1.68 ± 0.91	1.72 ± 0.67	0.279	0.780
Cholesterol (mmol/L)	4.50 ± 1.03	4.31 ± 0.88	1.080	0.282
Lipoprotein (a) (mmol/L)	235.67 ± 285.37	179.56 ± 184.67	1.243	0.216
High-density lipoprotein (mmol/L)	1.09 ± 0.24	1.15 ± 0.33	-1.086	0.279
Low-density lipoprotein (mmol/L)	3.13 ± 0.69	2.96 ± 0.72	1.272	0.206
High-sensitivity C-reactive protein (mg/L)	7.57 ± 4.74	6.23 ± 3.98	1.673	0.097
History of hypertension	22 (51.16)	40 (48.78)	0.064	0.800
History of diabetes	26 (60.47)	48 (55.54)	0.043	0.835
History of smoking	20 (46.51)	47 (57.32)	1.324	0.250
Plaque thickness (mm)	3.38 ± 0.83	3.30 ± 0.90	0.534	0.594
Superb micro-vascular imaging level
Level 0	1 (2.32)	17 (20.73)	56.678	< 0.001
Level I	6 (13.95)	48 (58.53)
Level II	17 (39.53)	14 (17.07)
Level III	19 (44.19)	3 (3.66)
Ultrasound contrast
Time-to-peak (s)	12.47 ± 1.88	12.98 ± 1.54	1.618	0.108
Enhancement intensity (db)	10.67 ± 1.52	8.82 ± 1.03	7.526	0.000

Table 2 Cox multivariate analysis of patients with ischemic stroke

Factors	B	SE	Wald	P-value	RR	95%CI
						Lower limit	Upper limit
Superb micro-vascular imaging level	0.640	0.312	4.112	0.013	1.896	1.971	6.696
Enhancement intensity	0.601	0.226	1.428	0.032	1.824	1.171	2.840