Table IV.

Comparisons of enhanced intensity values of carotid plaques with different echo types: median (interquartile range).

Echo type	Median (interquartile range) (×10-5AU)
Homogeneous hypoechoic plaque (Group 1)	0.0510 (0.0269–0.1877)
Heterogeneous hypoechoic plaque (Group 2)	0.1021 (0.0679–0.2013)
Homogeneous hyperechoic plaque (Group 3)	0.0125 (0.0036–0.0352)a,b
Heterogeneous hyperechoic plaque (Group 4)	0.0137 (0.0032–0.0300)a,b

χ²=29.025, P<0.001; the difference was statistically significant compared with

^aGroup 1

^bGroup 2.