Table 2.

Relationship between some variables with survival by using univariateand and multivariate Cox regression in patients with AML in Iran (1991-2011)

Variable				HR	% 95 CI for HR		P
					Lower	Upper
Multivariate Cox Regression	Relapse c GVHD			3.869 0.554	P<0.000 0 .007	5.608 0.848	P<0.001 0.007
Univariate Cox Regression	a GVHD Yes/No			1.198	0.333	1.727	0.333
	aGVHD grade		grad І and ІІ	Ref.
			grad ІІІ	0.007	1.182	0.007	0.007
			grad IV	P<0.000	2.050	P<0.001	P<0.001
	c GVHD Yes/No			0.476	0.001	0.727	0.001
	Relapse Yes/No			4.191	P<0.000	6.054	P<0.001
	GVHD	Did not develop aGVHD or cGVHD		Ref.
		Developed aGVHD or cGVHD		0.822	0.703	1.559	0.842
		Developed both aGVHD and cGVHD		0.078	0.375	1.054	0.078

*Reference Group.

^aGVHD: acute Graft versus Host Disease,

^cGVHD: chronic Graft Versus Host Disease