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

Table 1 Comparison of baseline data and clinical characteristics between the two groups

Characteristic	Very high-risk group (n = 35)	Non-very high-risk group (n = 123)	Statistic	P value
Age (year)	63 (55-70)	60 (52-67)	Z = -1.326	0.185
Sex (male)	21 (60.0)	66 (53.7)	χ2 = 0.556	0.456
BMI (kg/m2)	22.8 (20.5-24.9)	23.7 (21.5-26.0)	Z = -1.512	0.131
Abdominal pain/discomfort	22 (62.9)	63 (51.2)	χ2 = 1.665	0.197
Gastrointestinal bleeding	13 (37.1)	29 (23.6)	χ2 = 2.772	0.096
Palpable abdominal mass	9 (25.7)	9 (7.3)	χ2 = 9.812	0.002
Asymptomatic (incidentally detected)	5 (14.3)	40 (32.5)	χ2 = 4.714	0.030
Hemoglobin (g/L)	112 (98-126)	128 (115-140)	Z = -3.845	< 0.001
Platelet count (× 109/L)	240 (195-298)	208 (175-255)	Z = -2.501	0.012
Neutrophil count (× 109/L)	5.8 (4.6-7.1)	4.4 (3.7-5.3)	Z = -4.116	< 0.001
Lymphocyte count (× 109/L)	1.7 (1.3-2.0)	2.1 (1.7-2.5)	Z = -3.782	< 0.001
NLR	3.1 (2.3-4.5)	2.1 (1.6-2.8)	Z = -4.892	< 0.001
Albumin (g/L)	38.0 (35.1-40.5)	40.8 (38.0-43.5)	Z = -3.124	0.002
Tumor location			χ2 = 23.453	< 0.001
Stomach	12 (34.3)	90 (73.2)
Small intestine	18 (51.4)	30 (24.4)
Colorectum and others	5 (14.3)	3 (2.4)
Tumor rupture	7 (20.0)	0 (0.0)	Fisher’s exact test	< 0.001
Mitotic count (> 5/50 HPF)	31 (88.6)	10 (8.1)	χ2 = 95.321	< 0.001
Ki-67 index (%)	15 (10-25)	3 (2-5)	Z = -9.123	< 0.001

Continuous variables are presented as mean ± SD or median and interquartile range. Categorical variables are reported as n (%). BMI: Body mass index; NLR: Neutrophil-to-lymphocyte ratio; HPF: High-power field.