Table 2.

The frequency of four alleles of PGC gene polymorphism in health control, gastric cancer patients, and gastric cancer kindred group

	n	Alleles of PGC gene polymorphism
		1 (310 bp)	2 (400 bp)	3 (450 bp)	4 (480 bp)
Controls (Shenyang)	42	0.3571	0.2857	0.2262	0.1310
Gastric cancer patients	73	0.4315	0.2397	0.2534	0.0753
Controls (Zhuanghe)	113	0.4663	0.2389	0.1549	0.1504
Gastric cancer kindred	61	0.5164a	0.2705	0.1475	0.0656

^aP < 0.05 vs compared with control group of Shenyang χ² = 4.47.