Table 2. Prognostic factors for DFS and DSS in patients with omental GISTs according to univariate analysis (n = 63).

Prognostic factors	β	Hazard ratio (95% CI)	P value
DFS
Age (≤60/>60)	0.880	2.411(0.468–12.429)	0.293
Gender (male/female)	−0.190	0.827(0.160–4.269)	0.821
Location (lesser/greater omentum)	0.343	1.409(0.169–11.752)	0.751
Tumor size (≤10/>10)	3.724	41.440(0.067–25811.738)	0.045
Histological type(spindle/epithelioid/mixed)	0.393	1.482(0.569–3.863)	0.421
Mitotic index (≤5/>5)	2.082	8.021(0.937–68.653)	0.023
NIH risk category (1,2,3/4)	1.320	3.724(0.025–551.840)	0.605
DSS
Age (≤60/>60)	0.688	1.989(0.364–10.868)	0.427
Gender (male/female)	0.168	1.183(0.217–6.462)	0.846
Location (lesser/greater omentum)	3.279	26.556(0.002–376917.747)	0.501
Tumor size (≤10/>10)	3.724	42.173(0.042–42476.817)	0.289
Histological type (spindle/epithelioid/mixed)	0.806	2.239(0.784–6.392)	0.132
Mitotic index (≤5/>5)	4.836	125.999(0.062–255451.941)	0.004
NIH risk category (1,2,3/4)	1.277	22.142(0.004–3225.535)	0.713