Table 3.

Summary ORs and 95%CI of ALDH2 Glu504Lys polymorphism with colorectal cancer risk.

Variables	N a	Lys/Lys vs Glu/Glu	Glu/Lys vs Glu/Glu	Dominant model	Recessive model
		OR(95%CI) I2(%)	OR(95%CI) I2(%)	OR(95%CI) I2(%)	OR(95%CI) I2(%)
Total	9	0.80(0.55–1.16) 57.1	0.84(0.69–1.01) 59.8	0.84(0.69–1.02) 64.8	0.87(0.62–1.23) 51.7
Ethnicity
China	3	0.81(0.31–2.08) 75.0	0.70(0.57–0.85) 33.0	0.69(0.48–0.98) 67.7	0.97(0.43–2.20) 67.6
Japan	6	0.72(0.55–0.95) 27.3	0.95(0.74–1.21) 62.8	0.94(0.73–1.20) 67.4	0.76(0.58–1.00) 8.4
Quality
High-quality	8	0.81(0.55–1.21) 62.3	0.84(0.69–1.03) 64.8	0.85(0.69–1.04) 69.1	0.89(0.61–1.28) 57.4
Low-quality	1	/	/	/	/

^aNumber of comparisons.