Relationships among KRAS mutation status, expression of RAS pathway signaling molecules, and clinicopathological features and prognosis of patients with colorectal cancer

Table 1 Clinicopathological features of the 220 colorectal patients included in this study

	Patient characteristic	Number of patients	(%)
Gender	Male	113	51.3
	Female	107	48.6
Median age (yr)	< 56	17	7.7
	≥ 56	76	34.5
Tumor site	Right colon	45	20.5
	Left colorectum	175	79.5
Differentiation	Moderate-low	143	65
	Well	77	35
Infiltration depth	T1	13	5.9
	T2	29	13.2
	T3	86	39.1
	T4	92	41.8
Lymph node metastasis	N1-N3	118	53.6
	N0	102	46.4
TNM stage	I	35	15.9
	II	62	28.2
	III	73	33.2
	IV	50	22.7