Fig 3 gives the forest plot of the association between AUD and suicide attempt. According to this forest plot, AUD was strongly associated with suicide attempt, OR = 3.13 (95% CI: 2.45, 3.81). There was an extreme value (outlier) [28] among the studies with OR = 18.0 (95% CI: 2.75, 118) that was excluded from the meta-analysis.