Survival of advanced/recurrent gastrointestinal stromal tumors treated with tyrosine kinase inhibitors in Taiwan: a nationwide registry study

Table 3 Multivariate Cox regression analysis for PFS of recurrent/metastatic GIST patients treated with imatinib treatment

Multivariate analysis
	HR	95% CI	P value
c-KIT exon 13	-	-	-
c-KIT exon 17	0.889	0.120–6.609	0.9085
c-KIT exon 9	2.997	1.620–5.544	0.0005
PDGFRA	13.609	3.029–61.138	0.0007
Wild-type c-KIT/PDGFRA	0.876	0.409–1.877	0.7328
Primary site, referent nonstomach
stomach	0.943	0.563–1.580	0.8228

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