. Author manuscript; available in PMC: 2011 Mar 25.

Published in final edited form as: Circ Cardiovasc Imaging. 2009 Dec 31;3(2):179–186. doi: 10.1161/CIRCIMAGING.109.854307

Table 2.

Distance from the coronary ostium, short axis diameter, and cross-sectional area opacification gradients, with mean values, significance p related to a nonzero slope, and Pearson correlation coefficient r related to linear goodness-of-fit. Data over all 36 patients with no CT evidence of CAD is shown for the short axis diameter and cross-sectional area gradients. As noted in text, three vessels in patients with no CT evidence of CAD had a nonlinear (r<0.25) relationship between mean HU and distance from the ostium (2 RCA plus 1 LAD); these 3 vessels are excluded from the distance gradient computations.

	Vessel		Gradient Mean ± SD	Maximum p-value	Pearson r Mean ± SD
G_d, Distance from Ostium¹ (HU/cm)	RCA		-6.5±4.1	0.002	0.68±0.17
	LAD	No CAD	-13.7±8.0	0.026	0.80±0.15
	LAD	CAD	-20.0±11.0	<0.0001¹	0.80±0.09
	LCx		-12.5±7.8	0.015	0.73±0.19
G_s, Short Axis Diameter (HU/mm)	RCA		43.2±20.5	<0.0001²	0.79±0.12
	LAD	No CAD	47.6±20.7	<0.0001²	0.84±0.13
	LAD	CAD	75.2±31.4	<0.0001¹	0.68±0.14
	LCx		47.0±21.1	0.026	0.80±0.14
G_a, Area (HU/mm²)	RCA		9.0±4.8	<0.0001²	0.77±0.13
	LAD	No CAD	9.5±5.1	0.003	0.82±0.13
	LAD	CAD	17.6±10.8	<0.0001¹	0.73±0.11
	LCx		10.5±6.2	0.009	0.80±0.13

All 22 patients with lesions yielded p-values lower than 0.0001.

All 36 patients with no CT evidence of CAD yielded p-values lower than 0.0001.