TERT promoter mutations are a rare event in gastrointestinal stromal tumors

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Table 1 Prognostic factors by univariate and multivariate analysis

Factor	DFS				OS
	Number of	Univariate analysis	Multivariate analysis (Cox regression)		Univariate analysis	Multivariate analysis (Cox regression)
	cases	log-rank test p value	Hazard ratio (95 % CI)	p value	log-rank test p value	Hazard ratio (95 % CI)	p value
Age
≥60	51	0.278			0.152
<60	41
Age
≥65	39	0.070			0.092
< 65	53
Sex
F	38	0.436			0.571
M	54
Site
Stomach	66	0.068			0.035	−^a	−^a
Others	26
Size
>5 cm	40	<0.001	14.02 (1.764−111.4)	0.013	0.005	4.488 (0.501−40.229)	0.180
≤5 cm	52
Necrosis
+	29	0.013	−^a	−^a	0.067
–	63
Mitosis
>6	30	<0.001	5.644 (1.563−20.37)	0.008	0.001	7.531 (0.830−68.332)	0.073
≤5	62
Risk Classification
Very low or low	45	<0.001	−^a	−^a	0.028	−^a	−^a
Int or high	47