Table 2. CD26 expression categorized by TNM stage of CRC patients.

Variable	No. of casesa	Percentage	CD26 Expressiona		P *
			Low High
TNM stage (I, II and III, n = 115):
Stage I/II	66	57%	57	9	0.037
Stage III	49	43%	34	15
TNM stage (I, II and IV, n = 93):
Stage I/II	66	71%	57	9	<0.001
Stage IV	27	29%	6	21

TNM, tumour node metastasis.

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

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