Suicide-related presentations of homeless individuals to an inner-city emergency department

Role of homelessness and psychiatric disorders in suicide deaths among veterans: A four-way decomposition analysis

Homelessness and suicide are top priorities in the U.S. Department of Veterans Affairs (VA). This study examined the various pathways involving homelessness, substance use, and mental health disorders in relation to suicide deaths among veterans in the VA healthcare system. A retrospective cohort study was conducted among 6,128,921 veterans-399,125 homeless and 5,729,796 non-homeless-followed-up between 2017 and 2021 using VA/Department of Defense linked databases. Multivariable Cox regression was applied for homelessness and psychiatric disorders as predictor of suicide deaths, sequentially controlling for demographic, clinical, substance use, and mental health characteristics. Four-way decomposition analysis was used to calculate proportions of suicide deaths mediated and/or moderated by homelessness, substance use, and mental health disorders. The relationship between homelessness and suicide-specific mortality risk was reduced from 40 % greater risk in unadjusted to 9 % greater risk in fully-adjusted models. Nearly 26 % of the total effect of homelessness on suicide-specific mortality risk was mediated by substance use disorders, whereas 49 % was mediated and 36 % was moderated by mental health disorders. In conclusion, excess suicide-specific mortality risk in homeless veterans is partly explained by substance use and mental health disorders, highlighting the importance of wrap-around health and social services for homeless veterans in mitigating suicide risk.

Secondary mental health service utilisation following emergency department contact for suicidal behaviour: A systematic review

OBJECTIVE

Engagement with secondary mental health services after an emergency department presentation with suicidal behaviours may be an important strategy for reducing the risk of repeat attempts. Our aim was to examine secondary mental health service contact following a presentation to emergency department with suicidal behaviours.

METHODS

A systematic review of papers published between 2000 and 2020 was undertaken. This identified 56 papers relating to 47 primary studies. Data were extracted and summarised separately by age group: (1) young people, (2) older adults and (3) adults and studies with participants of 'all ages'.

RESULTS

Studies in young people (n = 13) showed, on average, 44.8% were referred and 33.7% had contact with secondary mental health services within 4 weeks of emergency department discharge. In comparison, in adult/all ages studies (n = 34), on average, 27.1% were referred to and 26.2% had mental health service contact within 4 weeks. Only three studies presented data on contact with mental health services for older adults, and proportions ranged from 49.0% to 86.0%.

CONCLUSION

This review highlights poor utilisation of secondary mental health service following emergency department presentation for suicidal behaviours, and further research is needed to identify the reasons for this. Crucially, this information could assist in the allocation of resources to facilitate the timely implementation of suicide prevention services.

Feasibility and acceptability of Narrative Exposure Therapy to treat individuals with PTSD who are homeless or vulnerably housed: a pilot randomized controlled trial

Background

Diagnosed PTSD rates in people who are homeless are more than double that of the general population, ranging between 21 and 53%. Complex PTSD (cPTSD) also appears to be more common than PTSD. One treatment option is Narrative Exposure Therapy (NET), a brief trauma-focused psychotherapy which attempts to place trauma within a narrative of the person’s life. Our primary aim was to assess the feasibility and acceptability of recruiting people to a randomized controlled trial (RCT) of NET alone compared to NET augmented by a genealogical assessment. We hypothesized that incorporating a genealogical assessment may be more effective than NET alone in a population with predominately complex PTSD.

Methods

This pilot RCT enrolled participants who were 18 years of age or older, currently homeless or vulnerably housed, and with active symptoms of PTSD. Participants were randomized to NET alone or NET plus a genealogical assessment. Rates of referral, consent, and retention were examined as part of feasibility. Demographic and clinical data were collected at baseline. Symptoms of PTSD, drug use, and housing status were re-assessed at follow-up visits. We conducted a thematic analysis of qualitative interviews of service providers involved in the study which explored barriers and facilitators of study participation.

Results

Twenty-two potential participants were referred to the study, with 15 consenting to participate. Of these, one was a screen failure and 14 were randomized equally to the treatment arms. One randomized participant was withdrawn for safety. Attrition occurred primarily prior to starting therapy. Once therapy began, retention was high with 80% of participants completing all six sessions. Seven participants completed all follow-up sessions. Service providers identified a clear need for the treatment and emphasized the importance of trauma-informed care, a desire to know more about NET, and more communication about the process of referral.

Conclusion

Recruiting participants who were vulnerably housed to an RCT of a trauma-based therapy was possible. Once therapy had started, participants were likely to stay engaged. We will incorporate the results of this trial into a conceptual model which we will test in a factorial study as part of the optimization phase of MOST.

Trial registration

ClinicalTrials.govNCT03781297. Registered: December 19, 2018