Table 2.

Association analysis between HIF-1α and P-gp expression in human colon carcinoma tissue

P-gp (No. of cases)	HIF-1α (No. of cases)		Total
	Positive	Negative
Positive	24	3	27
Negative	10	21	31
Total	34	24	58

R = 0.574, P < 0.01