Table 2.

CT numbers of the anatomical structures between scan timing adequacies

Anatomical structure	Early (n = 16)	Appropriate (n = 76)	Late (n = 22)	p value a
Abdominal aorta	337.6 ± 57.1 (236.5–470.3)	350.7 ± 54.9 (223.6–464.2)	329.5 ± 67.1 (168.3–438.1)	0.31
	Early vs Appropriate			0.26
	Early vs Late			1.00
	Appropriate vs Late			0.21
Portal vein	74.2 ± 15.0 (46.6–94.9)	130.9 ± 22.2 (86.0–184.5)	154.5 ± 19.5 (119.5–198.1)	<0.001
	Early vs Appropriate			<0.001
	Early vs Late			<0.001
	Appropriate vs Late			<0.001
Liver	69.0 ± 5.7 (54.9–76.4)	76.1 ± 10.3 (34.5–96.7)	82.5 ± 12.8 (58.5–120.7)	<0.001
	Early vs Appropriate			0.0014
	Early vs Late			<0.001
	Appropriate vs Late			0.0096
Pancreas	100.6 ± 11.4 (79.9–116.4)	122.3 ± 13.7 (90.4–150.7)	114.3 ± 12.3 (91.5–136.9)	<0.001
	Early vs Appropriate			<0.001
	Early vs Late			0.005
	Appropriate vs Late			0.015

Data are means ± 1 standard deviation with ranges in parentheses.

^aThe Kruskal-Wallis test was used for comparisons between the three groups and the Mann-Whitney U test for comparisons between the two groups.