Table 3.

Multivariate regression analysis.

Item	B	S.E.	Wald	P	Exp (B)	95% CI
Amount of bleeding (ml)	2.132	1.016	4.403	0.003	8.435	1.151∼11.357
Time of operation (hours)	2.398	1.211	3.923	0.019	10.998	6.313∼17.242
Diabetes mellitus	2.952	1.240	5.664	0.004	1.150	0.192∼1.983