Table 4. Mean, standard deviation, and analysis of variance of patient factors stratified by anemia severity.

IVC: inferior vena cava

Variable	Range	Mean (SD)	Non-anemic (n = 272)	Mild anemia (n = 65)	Moderate anemia (n = 66)	Severe anemia (n = 20)	Test value	p-value
Age (years)	15–92	48.4 (17.7)	44.7 (15.7)	49.5 (18.0)	56.7 (19.7)	67.7 (15.6)	18.974	<0.001
Aortic density	20–51	37.7 (5.4)	40.0 (4.9)	38.6 (5.3)	35.5 (4.8)	31.2 (4.4)	31.625	<0.001
IVC density	16–51	36.1 (5.4)	38.1 (4.3)	35.3 (4.7)	31.7 (4.3)	25.7 (4.4)	79.207	<0.001
Hb level g/dL	3.7–17.9	12.8 (2.4)	14.2 (1.3)	11.9 (0.6)	9.6 (0.9)	7.0 (1.0)	504.633	<0.001