Table 1.

Hypermethylation and expression loss of SFRP1 in primary gastric cancer and matched cancer adjacent tissue samples

	n	Hypermethylation (+)	Expression (-)
Gastric cancer	52	23	17
Adjacent tissue	52	8	6
P		χ2 = 10.34, P < 0.01	χ2 = 6.75, P < 0.01