Clinical outcomes of gastrointestinal stromal tumor in southern Thailand

Table 3 Univariate survival analysis of factors associated with survival in 99 cases of gastrointestinal stromal tumors

	Four-year OS (%)	P value
OS (99 cases)	72.4
Primary tumor site		0.02
Stomach	86.5
Non-stomach	64.5
Risk category1		< 0.01
Non-high risk (35 cases)	92
High risk (64 cases)	60.9
Liver metastasis at diagnosis		< 0.01
Absent (72 cases)	86.3
Present (27 cases)	44.6
Residual disease after surgery		0.04
Absent (56 cases)	84.1
Present (21 cases)	61.5
Response to targeted therapy		0.03
CR + PR (8 cases)	88.9
SD + PD (40 cases)	64.2

¹Risk categorization according to the United States National Institute of Health consensus 2002. OS: Overall survival; SD: Stable disease; PD: Progressive disease; CR: Complete response; PR: Partial response.