There was an outlier (OR = 18.0) [28] among the included studies addressing the association between AUD and suicide attempt. This cohort study was a report of research on suicide attempt based on an analysis of data from the Epidemiologic Catchment Area surveys, enrolling 13,673 participants, in the United States, in the early 1980s. This study reported the association between active alcoholism and suicide attempt using multiple conditional logistic regression analysis. The full text of this study was not accessible for further evaluation of the study population and its associated eligibility criteria. Thus, the reason of this extreme value remained unclear.
