Factors associated with gastrointestinal stromal tumor rupture and pathological risk: A single-center retrospective study

Table 2 Analysis of related factors of pathological risk grade of gastrointestinal stromal tumors

	Low risk (n = 24)	Intermediate risk (n = 6)	High risk (n = 20)	χ2 value	P value
Age (yr)				1.94	0.38
< 60	5	2	8
≥ 60	19	4	12
Gender				8.10	0.02
Male	9	3	16
Female	15	3	4
Tumor diameter (cm)				10.47	0.01
< 10	22	6	11
≥ 10	2	0	9
Tumor shape				2.26	0.32
Irregular	9	1	10
Regular	15	5	10
Internal necrosis				5.37	0.07
No	18	5	9
Yes	6	1	11
Tumor rupture				8.47	0.02
No	21	6	11
Yes	3	0	9
Gas-liquid interface				0.79	0.67
Absence	15	3	10
Presence	9	3	10
Primary site				3.46	0.18
Gastric	16	4	8
Small bowel	8	2	12
Mitotic count (50/HPF)				4.49	0.11
< 5	8	3	3
≥ 5	16	2	17
Ki-67 index (%)				6.30	0.04
< 10	21	5	11
≥ 10	3	1	9

HPF: High-power field.