Perceptuomotor function of homeless males in alcohol rehabilitation

Exploring and Mapping Screening Tools for Cognitive Impairment and Traumatic Brain Injury in the Homelessness Context: A Scoping Review

Cognitive impairment is common amongst people experiencing homelessness, yet cognitive screening and the collection of history of brain injury rarely features in homelessness service delivery practice. The purpose of this research was to scope and map strategies for screening for the potential presence of cognitive impairment or brain injury amongst people experiencing homelessness and identify instruments that could be administered by homelessness service staff to facilitate referral for formal diagnosis and appropriate support. A search was conducted across five databases, followed by a hand search from relevant systematic reviews. A total of 108 publications were included for analysis. Described in the literature were 151 instruments for measuring cognitive function and 8 instruments screening for history of brain injury. Tools that were described in more than two publications, screening for the potential presence of cognitive impairment or history of brain injury, were included for analysis. Of those regularly described, only three instruments measuring cognitive function and three measuring history of brain injury (all of which focused on traumatic brain injury (TBI)) may be administered by non-specialist assessors. The Trail Making Test (TMT) and the Ohio State University Traumatic Brain Injury Identification Method (OSU TBI-ID) are both potentially viable tools for supporting the identification of a likely cognitive impairment or TBI history in the homelessness service context. Further population-specific research and implementation science research is required to maximise the potential for practice application success.

Traumatic brain injury in homeless and marginally housed individuals: a systematic review and meta-analysis

BACKGROUND

Homelessness is a global public health concern, and traumatic brain injury (TBI) could represent an underappreciated factor in the health trajectories of homeless and marginally housed individuals. We aimed to evaluate the lifetime prevalence of TBI in this population, and to summarise findings on TBI incidence and the association between TBI and health-related or functioning-related outcomes.

METHODS

For this systematic review and meta-analysis, we searched without date restrictions for original research studies in English that reported data on the prevalence or incidence of TBI, or the association between TBI and one or more health-related or function-related outcome measures. Studies were included if they had a group or clearly identifiable subgroup of individuals who were homeless, marginally housed, or seeking services for homeless people. With use of random-effects models, we calculated pooled estimates of the lifetime prevalence of any severity of TBI and the lifetime prevalence of moderate or severe TBI. We used meta-regression and subgroup analysis to evaluate potential moderators of prevalence estimates and the leave-one-out method for sensitivity analyses. We then summarised findings from all studies that evaluated TBI incidence and the association between TBI and health-related or functioning-related outcomes. All statistical analyses were done using R version 3.5.1. The study is registered with PROSPERO, number CRD42019119678.

FINDINGS

Of 463 potentially eligible studies identified by the search, 38 studies were included in the systematic review and 22 studies were included in the meta-analysis. The lifetime prevalence of any severity of TBI in homeless and marginally housed individuals (18 studies, n=9702 individuals) was 53·1% (95% CI 46·4-59·7; I²=97%) and the lifetime prevalence of moderate or severe TBI (nine studies, n=5787) was 22·5% (13·5-35·0; I²=99%). The method used to ascertain TBI history, the age of the sample, and the sample size significantly moderated estimated lifetime prevalence of any severity of TBI. TBI was consistently associated with poorer self-reported physical and mental health, higher suicidality and suicide risk, memory concerns, and increased health service use and criminal justice system involvement.

INTERPRETATION

The lifetime prevalence of TBI is high among homeless and marginally housed individuals, and a history of TBI is associated with poorer health and general functioning. Health-care providers and public health officials should have an increased awareness of the burden of TBI in this population. Prospective and longitudinal studies are needed to better understand how the health of this population is affected by TBI.

FUNDING

Canadian Institutes of Health Research.

Disaffiliation, substance use, and exiting homelessness

This study tested whether social affiliation was associated with exits from homelessness for a county-wide probability sample of 397 homeless adults who were followed over a 15-month period culminating in 1992. For the total sample, support from family or friends and service use were related to an increased likelihood of exiting from homelessness. Surprisingly, exits from homelessness were associated with social affiliation (i.e., support from family/friends and services use) only among homeless adults who did not have current substance-use disorders. This relationship did not hold for those with current substance-use disorders. Findings suggest that homeless adults without current substance-use disorders may be better able to engage services and support from family/friends to exit homelessness than homeless adults who have current substance-use disorders. Perhaps service providers who are targeting homeless adults with substance-use disorders and want to help them exit homelessness need to emphasize initiating substance-use treatment before addressing other issues.

Neuropsychological function and psychosocial status of alcohol rehabilitation program residents

This investigation examined the relationship between changes in psychosocial status and changes in neuropsychological function of clients undergoing treatment for substance use. A sample of 74 adults enrolled at a rehabilitation program for substance use were randomly assigned to two groups (one serving as a comparison group for practice effects). Participants were tested three times over 60 days on self-esteem, motivation, depression, and neuropsychological function. Consistent with other studies, participants demonstrated impaired baseline neuropsychological function that improved with alcoholic abstinence; however, changes in motivation and depression were associated with positive changes on few tests of neuropsychological function. The more common predictor of improved motor function test scores was low baseline function. Participants who remained in treatment were more likely to be Black, homeless, report less alcohol consumption, and score lower on a motivational scale than those who left treatment.