Table 2.

Comparison of IVUS vs All CCTAs (Combined 64-slice and 256-slice): Anatomical plaque characteristics and ESS measurements

Metric	IVUS (n=686)	CCTA (n=686)	Correlation Coefficient	P value*
Vessel Area (mm2)	12.7 ± 4.3	10.7 ± 4.5	0.63	<0.0001
Lumen Area (mm2)	6.8 ± 2.7	5.6 ± 2.7	0.43	<0.002
Plaque Area (mm2)	5.9 ± 2.9	5.1 ± 3.2	0.52	<0.0001
MLA per artery (mm2)	4.5 ± 1.3	4.1 ± 1.5	0.67	<0.0001
Average ESS (Pa)	2.6 ± 1.5	3.3 ± 3.0	0.35	<0.042
Plaque 90° arc Min ESS (Pa)	2.0 ± 1.4	2.5 ± 2.6	0.28	<0.55
Plaque 90° arc Max ESS (Pa)	3.3 ± 1.6	4.2 ± 3.6	0.42	<0.0004

Values are presented as mean± SD for continuous variables, n= number of analyzed segments, CCTA= coronary computed tomography angiography, MLA=minimal luminal area, Min ESS= minimal endothelial shear stress, Max ESS= maximal endothelial shear stress, Average ESS=average endothelial shear stress

P value

^*= P value of the correlation coefficient, correlation coefficient is different from r=0.25