Table 1 Study inclusion criteria

Language

1 Reported in English

Publication status

2 Published in peer-review journals

Exposure

3 ALDH2 rs671 polymorphism

Outcome

4 Cardio-cerebral vascular diseases, diabetes mellitus, cancer, neurodegenerative diseases, or alcohol-induced medical diseases

Study design

5 The study design was a systematic review

6 Evidence was synthesized utilizing quantitative methods

7 The study designs of primary studies were cohort, nested case-control, or case-control studies