Risk factors for suicide in adults: systematic review and meta-analysis of psychological autopsy studies

Author:

Favril LouisORCID,Yu Rongqin,Uyar Abdo,Sharpe Michael,Fazel Seena

Abstract

QuestionEffective prevention of suicide requires a comprehensive understanding of risk factors.Study selection and analysisFive databases were systematically searched to identify psychological autopsy studies (published up to February 2022) that reported on risk factors for suicide mortality among adults in the general population. Effect sizes were pooled as odds ratios (ORs) using random-effects models for each risk factor examined in at least three independent samples.FindingsA total of 37 case–control studies from 23 countries were included, providing data on 40 risk factors in 5633 cases and 7101 controls. The magnitude of effect sizes varied substantially both between and within risk factor domains. Clinical factors had the strongest associations with suicide, including any mental disorder (OR=13.1, 95% CI 9.9 to 17.4) and a history of self-harm (OR=10.1, 95% CI 6.6 to 15.6). By comparison, effect sizes were smaller for other domains relating to sociodemographic status, family history, and adverse life events (OR range 2–5).ConclusionsA wide range of predisposing and precipitating factors are associated with suicide among adults in the general population, but with clear differences in their relative strength.PROSPERO registration numberCRD42021232878.

Funder

Wellcome Trust

Publisher

BMJ

Subject

Psychiatry and Mental health

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