High levels of serum platelet-derived growth factor-AA and human epidermal growth factor receptor-2 are predictors of colorectal cancer liver metastasis

Table 1 Patient clinical and pathological characteristics n (%)

Clinical variable	Group A (n = 10)	Group B (n = 10)	P value
mean age (yr)	68 (41-79)	60 (30-73)	0.150
Male	6 (60)	4 (40)	0.625
pT stage			1.000
pT3	6 (60)	6 (60)
pT4	4 (40)	4 (40)
pN stage			0.168
pN0	0	1 (10)
pN1	0	3 (30)
pN2	4 (40)	6 (60)
Location			1.000
Right colon	4 (40)	4 (40)
Left colon/rectum	6 (60)	6 (60)
Histology differentiation			1.000
Well	2 (20)	2 (20)
Moderately	4 (40)	4 (40)
Poorly/mucinous	4 (40)	4 (40)
Lymphovascular invasion	6 (60)	4 (40)	0.625
Preoperative CEA (median, range)	1.74 (1.18-11.0)	9.64 (1.12-512.9)	0.017

Quantitative variables are represented as median (range); qualitative characteristics are represented as n (%). CEA: Carcinoembryonic antigen.