Role of Ki-67 as a prognostic factor in gastrointestinal stromal tumors

Table 3 Multivariate analysis of different parameters for the disease free interval in patients with initially localized disease (n = 65)

Parameter	Beta	Standard error	t value	Exponent beta	P value
Tumor size	0.052	0.031	1.643	1.053	0.100
Number of mitosis	0.011	0.014	0.797	1.011	0.424
Necrosis	0.525	0.633	0.830	1.691	0.406
Haemorrhage	0.865	0.673	1.285	2.377	0.198
Ki-67	0.113	0.030	3.778	1.120	0.0001
c-KIT	0.592	0.536	1.102	1.807	0.270
SMA	-1.213	0.575	-2.110	0.297	0.034
S100	-0.237	0.771	-0.308	0.788	0.757
CD34	-1.088	0.562	-1.935	0.336	0.052

SMA: Smooth muscle actin.