Multi-slice spiral computed tomography in differential diagnosis of gastric stromal tumors and benign gastric polyps, and gastric stromal tumor risk stratification assessment

Table 4 Comparison of computed tomography values between gastric stromal tumor group and control group (mean ± SD, HU)

Groups	n	Arterial phase	Venous phase	Delay period	Reinforcement peak
GST group	64	63.98 ± 14.38	59.04 ± 12.74	66.58 ± 11.47	75.58 ± 12.88
Control group	60	47.61 ± 11.04	56.48 ± 14.20	64.72 ± 9.83	64.46 ± 10.94
t value		-7.137	-1.054	-0.971	-5.192
P value		0.000	0.294	0.333	0.000

GST: Gastric stromal tumor.