Fig. 1
From: Roles of defective ALDH2 polymorphism on liver protection and cancer development
Interaction between ALDH2 polymorphism and alcohol intake on oesophageal cancer risk and indicators of excessive drinking. a Estimated odds ratios (OR) for oesophageal cancer with adjustment for cumulative smoking level reported by Koyanagi and colleagues (a Japanese case–control study) [47]. The error bars represent 95 % confidence intervals. b Indicators of excessive drinking reported by Takeshita and colleagues (population-based study for Japanese workers) [57]. Data represent mean value. AST aspartate transaminase, ALT alanine transaminase