Previous suicide attempt and subsequent risk of re-attempt and suicide: Are there differences in immigrant subgroups compared to Swedish-born individuals?

BACKGROUND

Studies investigating how suicide attempting refugees and non-refugee migrants differ from Swedish-born individuals in terms of re-attempts and suicide are missing. It remains unknown how mental disorders and labour market marginalization (LMM) impact on these associations.

METHODS

This longitudinal cohort study included Swedish residents aged 20-64 with suicide attempt in 2004-2012. In total, 42,684 individuals including 2017 refugees, and 2544 non-refugee migrants were included and followed until December 31, 2016. Risks of re-attempt and suicide were calculated as hazard ratios (HR) with 95% confidence intervals (CI), and adjusted for important confounders. Stratified analyses were to assess if mental disorders or LMM modified these associations.

RESULTS

In the adjusted models, refugees had an adjusted HR (aHR) of suicide re-attempt of 0.74 (CI: 0.67-0.81), and an aHR of 0.67 (CI: 0.53-0.86) for suicide death. These estimates were very similar to those of non-refugee migrants. Refugees and non-refugee migrants with suicide attempt had a lower prevalence of specialised health care due to mental disorders compared to Swedish-born attempters (48%, 44% and 61%, respectively). Mental disorders and LMM in terms of long-term sickness absence and disability pension increased the risk of re-attempt and suicide in all three groups.

LIMITATIONS

Only suicide attempts and mental disorders resulting in specialized in-and outpatient care were registered.

CONCLUSION

Migrants show considerably lower risks of re-attempt and suicide than Swedish-born individuals, with no differences between migrant groups. Despite vast differences in the prevalence of specific mental disorders, the role of mental disorders in the pathways to re-attempt and suicide does not appear to differ considerably between these groups.