The characteristics of the included studies are summarized and listed in Table 1. The included studies involved 420,732 participants. A study [52] assessed the association between AUD and suicide in two different countries (the USA and France) concurrently. Thus, this study is presented twice in Table 1 as well as the forest plots. Eight studies reported the association between AUD and suicidal ideation, 15 studies reported the association between AUD and suicide attempt, and 14 studies reported the association between AUD and completed suicide. Since four studies [29,30,46,52] have reported the association between AUD and suicidal ideation, suicide attempts, and completed suicide concurrently, therefore, the number effect sizes given in the forest plots is more than the total number of included studies. Some cohort studies reported RR and some others as well as the case-control and cross-sectional studies reported OR.
