Predictive value of multi-slice spiral computed tomography tumor diameter and necrotic ratio for very high-risk gastrointestinal stromal tumors

Table 3 Variable assignment table for multivariate logistic regression analysis

Variable type	Variable name	Coding/definition
Dependent variable	GIST risk classification	0 = non-very high-risk group; 1 = very high-risk group
Independent variables	Palpable abdominal mass	0 = no; 1 = yes
	Asymptomatic	0 = no; 1 = yes
	Hemoglobin	Continuous variable (g/L)
	Platelet count	Continuous variable (× 109 /L)
	NLR	Continuous variable
	Albumin	Continuous variable (g/L)
	Tumor location	0 = stomach; 1 = non-gastric
	Maximum tumor diameter	Continuous variable (cm)
	NAR	Continuous variable (%)
	Growth pattern (mixed intra- and extraluminal)	0 = no (intraluminal or extraluminal); 1 = yes
	Irregular morphology	0 = no; 1 = yes
	Ill-defined margin	0 = no; 1 = yes
	Heterogeneous enhancement	0 = no; 1 = yes
	Marked enhancement	0 = no (mild/moderate); 1 = yes
	Signs of adjacent organ invasion	0 = no; 1 = yes

GIST: Gastrointestinal stromal tumor; NLR: Neutrophil-to-lymphocyte ratio; NAR: Necrotic area ratio.