Table 3. Mean, standard deviation, and t-test analyses of several patient factors stratified by sex.

IVC: inferior vena cava

Variable	Range	mean (SD)	Male	Female	Test value	p-value
Age (years)	15–92	48.4 (17.7)	48.2 (17.5)	48.6 (18.1)	−0.265	0.791
Aortic density	20–51	37.7 (5.4)	39.3 (5.5)	37.9 (5.2)	2.745	0.006
IVC density	16–51	36.1 (5.4)	36.9 (5.4)	35.0 (5.3)	3.750	<0.001
Hb level (g/dL)	3.7–17.9	12.8 (2.4)	13.6 (2.2)	11.7 (2.2)	8.390	<0.001