Association of genetic polymorphisms of aldehyde dehydrogenase-2 with esophageal squamous cell dysplasia

Table 2 Association of factors with squamous cell dysplasia of esophagus

Factors	OR (95% CI)1	OR (95% CI)2
Smoking index
0	1.00	1.00
< 500	1.32 (0.80-2.18)	1.19 (0.64-2.24)
≥ 500	1.81 (1.12-2.90)	1.56 (0.83-2.91)
Drinking index
0	1.00	1.00
< 65	1.12 (0.67-1.86)	0.92 (0.49-1.76)
≥ 65	1.40 (0.88-2.22)	1.03 (0.55-1.96)
History of esophageal cancer
No	1.00	1.00
Yes	1.10 (0.66-1.85)	1.08 (0.64-1.83)
ALDH2
A/A	1.00	1.00
A/G	2.17 (1.09-4.34)	2.19 (1.08-4.43)
G/G	4.76 (2.37-9.56)	4.50 (2.21-9.19)

¹Crude OR;

²Adjusted ORs were adjusted for age and gender. OR: Odds ratio; CI: Confidence intervals.