Table 1. CD26 expression categorized by clinicopathological data of CRC patients.

Variable		No. of casesa	CD26 Expressiona		P *
			Low(n = 98) High(n = 45)
Age (years old):	>65	42	24	18	0.075
	≤65	101	74	27
Gender:	Male	81	56	25	0.858
	Female	62	42	20
Tumour size (cm3):	>5	51	35	16	1.000
	≤5	92	63	29
Degree of Differentiation:	Well and moderate	132	94	38	0.029
	Poor	7	2	5
TNM stage:	Stage I/II	66	57	9	<0.001
	Stage III/IV	76	40	36
Metastasis statusb:	No metastasis	116	92	24	<0.001
	Metastasis	27	6	21
Liver Metastasis:	No	123	92	31	<0.001
	Yes	20	6	14

TNM, tumour node metastasis.

^aThe total number of cases may be less than 143 because of missing information.

^bPatients with distant metastasis were classified as “Metastasis”.

*χ² test (or Fisher exact test in 2-sided)