Table 2.

Comparisons of risk factors for blood loss

Characteristics	Number of patients		p Value
	3000 mL or less blood loss (N = 104)	Greater than 3000 mL blood loss (N = 69)
Age			0.506
Older than 40 years	58	42
40 years or younger	46	27
Gender			0.032
Male	46	42
Female	58	27
Blood supply			0.002
Excessive	29	35
Less	75	34
Location			< 0.001
Cephalad to S2	76	65
Caudad to S2	28	4
Recurrent tumor			0.752
Yes	22	16
No	82	53
Preoperative radiation			0.245
Yes	6	1
No	98	68
Tumor volume			< 0.001
Greater than 200 cm3	35	49
200 cm3 or less	69	20
Aorta occlusion			0.008
Yes	39	40
No	65	29
Approach			< 0.001
Anterior and posterior	5	19
Posterior	99	50
Type of resection			0.249
En bloc	53	29
Piecemeal	51	40
Reconstruction			0.007
Yes	78	63
No	26	6
Operative time			0.001
Longer than 3 hours	21	48
3 hours or less	59	45