Review of Major Social Determinants of Health in Schizophrenia-Spectrum Disorders: II. Assessments

Addressing social determinants of health in individuals with mental disorders in clinical practice: review and recommendations

Social determinants of health have been shown to have a greater impact on overall health than traditionally considered medical risk factors, especially in people with mental disorders. It is the primary responsibility of healthcare providers to ensure that persons with psychiatric disorders are actively helped in reducing the adverse effects of SDoMH on their health and healthcare. Yet, the current clinical psychiatric practice in the U.S. does not have any standardized guidelines for evaluating or addressing these critical factors even among individuals who are receiving psychiatric and other medical treatment. Although there are several barriers to implementing such interventions, there are also practical approaches to address selected social determinants of mental health and improve the well-being of our patients. In this article, we review the literature on the assessment of relevant social factors and pragmatic psychosocial strategies at the individual, family, and community levels to help reduce their adverse impact. We offer guidelines for psychiatric clinicians and case managers to improve the health and quality of life of persons with mental disorders, using sustained inter-professional collaborative efforts.

Social Determinants of Health and Suicide-Related Outcomes: A Review of Meta-Analyses

Importance

Preventing suicide is one of the top priorities in public health policy. Identifying key social determinants of health (SDOH) in suicide risk is critical for informing clinical practices, future research, and policy solutions to prevent suicide.

Objective

To examine the associations of SDOH with suicide-related outcomes.

Data Sources

Studies published before July 2023 were searched through PubMed, PsycINFO, Embase, and Web of Science. The date of the search was August 4, 2023.

Study Selection

We included the most up-to-date meta-analyses reporting associations between SDOH and suicide-related outcomes.

Data Extraction and Synthesis

Three independent reviewers extracted data and conducted quality assessment using the Joanna Briggs Institute Checklist for Systematic Reviews and Research Syntheses.

Main Outcomes and Measures

The main outcomes of interest were suicide mortality, suicide attempt, and suicidal ideation.

Results

A total of 46 meta-analyses met inclusion criteria. For suicide mortality, justice system-involved individuals in the community, exposure to others' and parental suicide, firearm accessibility, divorce, experience in foster care, release from incarceration, and midlife (age 35-65 years) unemployment were the SDOH with consistently strong effects. Individuals released from incarceration demonstrated a high prevalence of suicide mortality (114.5 per 100 000 persons). With regard to suicide attempt, experience of childhood abuse and maltreatment and sexual assault, gender and sexual minority status, and parental suicide mortality were the strongest risk factors. The prevalence of suicide attempt among homeless individuals (28.9%; 95% CI, 21.7%-37.2%) and incarcerated female youths (27%; 95% CI, 20%-34%) and adults (12.2%; 95% CI, 7.1%-17.2%) was high. For suicidal ideation, identification as bisexual and intimate partner violence in women were the strongest risk factors. The prevalence of lifetime suicidal ideation in homeless individuals was 41.6% (95% CI, 28.6%-56.0%). Protective factors associated with reduced risk of suicide mortality were religious affiliation and being married. School connectedness showed protective associations against suicide attempt and suicidal ideation.

Conclusions and Relevance

Tailoring interventions and future research for identified priority subpopulations, such as justice system-involved individuals in the community, and implementing policy measures addressing the SDOH that showed strong associations with suicide mortality, attempts, and ideation, such as gun licensing requirements, are critical to counteracting social and environmental forces that increase suicide risk.

Surviving the 2021 heat dome with schizophrenia: A qualitative, interview-based unpacking of risks and vulnerabilities

This study explores the multifaceted challenges experienced by individuals with schizophrenia during extreme heat, highlighting the interplay between individual factors, social dynamics, and environmental influences. Despite making up only 1% of the Canadian population, individuals diagnosed with schizophrenia comprised 16% (n = 97) of the deaths during the 2021 heat dome in Western Canada. However, to date, there exists scant qualitative research that explore the direct experiences and the intricacies of intersecting factors faced by individuals with schizophrenia during extreme heat events. This study aims to explore experiences of heat by those living with schizophrenia, including social, behavioural and physiological vulnerability factors that may exacerbate heat-related risks. Between October 2023 and February 2024, semi-structured interviews were conducted with 35 people with a clinical diagnosis of schizophrenia from in-patient and community settings. Participants had experienced the 2021 Heat Dome, or other extreme heat events, in a community setting within British Columbia, Canada. A descriptive form of thematic analysis that prioritizes participants' experiences was used to identify and explore patterns in the interview transcripts. Participants' narratives underscore how some symptoms of schizophrenia - such as paranoia and delusional thinking - may hinder participants' ability to seek relief from the heat and interpret bodily sensations accurately. Social isolation, compounded by societal stigma, acts as a significant barrier to accessing support networks and public resources for coping with extreme temperatures. Additionally, participants described feeling deterred from seeking medical care or public resources due to past negative experiences and social stigma. Findings illustrate various factors that contribute to the disproportionate impact of extreme heat on individuals diagnosed with schizophrenia, encapsulating both schizophrenia-specific biomedical factors as well as social vulnerability associated with their diagnosis. These findings can inform the development of a multidimensional approach that transcends individual responsibility and addresses the systemic and structural determinants of health.

Modelling the impact of environmental and social determinants on mental health using generative agents

Mental health is shaped by socio-environmental determinants, yet traditional research approaches struggle to capture their complex interactions. This review explores the potential of generative agents, powered by large language models, to simulate human-like behaviour in virtual environments for mental health research. We outline potential applications including the modelling of adverse life events, urbanicity, climate change, discuss potential challenges and describe how generative agents could transform mental health research.

Chronic social stressors and striatal dopamine functioning in humans: A systematic review of SPECT and PET studies

The dopamine hypothesis of schizophrenia posits that elevated striatal dopamine functioning underlies the development of psychotic symptoms. Chronic exposure to social stressors increases psychosis risk, possibly by upregulating striatal dopamine functioning. Here we systematically review single photon emission computed tomography (SPECT) and positron emission tomography (PET) studies that examined the relationship between chronic social stress exposure and in vivo striatal dopamine functioning in humans. We searched the scientific databases PubMed and PsycINFO from inception to August 2023. The quality of the included studies was evaluated with the ten-item Observational Study Quality Evaluation (PROSPERO: CRD42022308883). Twenty-eight studies were included, which measured different aspects of striatal dopamine functioning including dopamine synthesis capacity (DSC), vesicular monoamine transporter type 2 binding, dopamine release following a pharmacological or behavioral challenge, D2/3 receptor binding, and dopamine transporter binding. We observed preliminary evidence of an association between childhood trauma and increased striatal DSC and dopamine release. However, exposure to low socioeconomic status, stressful life events, or other social stressors was not consistently associated with altered striatal dopamine functioning. The quality of available studies was generally low. In conclusion, there is insufficient evidence that chronic social stressors upregulate striatal dopamine functioning in humans. We propose avenues for future research, in particular to improve the measurement of chronic social stressors and the methodological quality of study designs.

Defining Urbanicity in the Context of Psychosis Research: A Qualitative Systematic Literature Review

BACKGROUND AND HYPOTHESIS

Numerous studies have found that being born or raised in urban environments increases the odds of developing psychosis in Northern and Western Europe. However, available research from Southern Europe, Latin America, and Asia has reported null results. A limitation in most studies to date is the inadequate characterization of urban and rural life components that may contribute to varying psychosis risk across regions.

STUDY DESIGN

To deepen our understanding of the different concepts and measures of urbanicity and related factors in psychosis research, we conducted a qualitative systematic literature review extracting information from studies published between 2000 and 2024.

STUDY RESULTS

Sixty-one articles met the inclusion and exclusion criteria and were used in the thematic analysis. The analysis revealed that urbanicity lacked a single, coherent definition across studies and regions. Three major categories of themes were developed from the analysis: (1) Urbanicity comprises several interconnected constructs, (2) Urbanicity measurements vary between countries from the Global North and the Global South, and (3) Urbanicity operates through key neighborhood-level mechanisms.

CONCLUSIONS

Future research on urbanicity and psychosis should consider the potential limitations of urbanicity's conceptualization and operationalization and aim to address these limitations by focusing on contextual, historical, and community-level factors, utilizing locally validated measures, and employing mixed-method designs.

Social determinants of mental health in major depressive disorder: Umbrella review of 26 meta-analyses and systematic reviews

There is a growing recognition of the impact of social determinants of mental health (SDoMHs) on people with, or at risk of, developing serious mental illnesses. Yet it is not known how associations of individual SDoMHs with risk for major depressive disorder (MDD) vary and roughly compare with one another. Following PRISMA guidelines, this umbrella review included 26 meta-analyses and systematic reviews that reported odds ratios, effect sizes, and/or pooled prevalence rates of MDD in samples with versus without specified SDoMHs. Childhood emotional, physical, or sexual abuse and neglect; intimate partner violence in females; and food insecurity were significantly associated with increased risk of MDD, with medium effect sizes. Natural disasters, terrorist acts, and military combat during deployment had small-size adverse effects, and homelessness, incarceration, and migration were associated with significantly elevated prevalence of MDD. Conversely, higher levels of parental care were significantly associated with reduced risk of MDD with medium effect sizes. Evidence supports the use of certain interventions at the individual and community level that can reduce the impact of these factors and promote health, although much more research is warranted in this area along with meaningful healthcare and societal policies to accomplish this goal.

Associations of Systemic Inflammation and Senescent Cell Biomarkers with Clinical Outcomes in Older Adults with Schizophrenia

Individuals with schizophrenia suffer from higher morbidity and mortality throughout life partly due to acceleration of aging-related diseases and conditions. Systemic inflammation is a hallmark of aging and is also observed in schizophrenia. An improved understanding of how inflammation and accelerated aging contribute to long-term health outcomes in schizophrenia could provide more effective treatments to preserve long-term cognitive and physical function. In this pilot cross-sectional study, 24 older adults (≥55 years old) with schizophrenia were assessed on symptoms (Positive and Negative Syndrome Scale), neurocognition (Matrics Consensus Cognitive Battery), mobility (Timed Get Up and Go), and general health (SF-12). Serum levels of 112 different cytokines were measured, from which we derived estimated senescence-associated secretory phenotype (SASP) scores for each participant. Two-tailed Pearson's bivariate correlations were computed to test the associations between schizophrenia clinical outcomes with individual cytokines, and SASP. Higher levels of eotaxin, IL-1α, IL-1β, and IFNα are associated with both worse PANSS negative and depressive symptoms scores. IL-1α and IL-1β negatively associated with general physical health whereas eotaxin negatively associated with mobility and global cognition. Overall, we found that specific inflammatory cytokines, but not composite measurements of SASP, are associated with clinical outcomes in older adults with schizophrenia.

Social connections as determinants of cognitive health and as targets for social interventions in persons with or at risk of Alzheimer's disease and related disorders: a scoping review

BACKGROUND

Social connections have a significant impact on health across age groups, including older adults. Loneliness and social isolation are known risk factors for Alzheimer's disease and related dementias (ADRD). Yet, we did not find a review focused on meta-analyses and systematic reviews of studies that had examined associations of social connections with cognitive decline and trials of technology-based and other social interventions to enhance social connections in people with ADRD.

STUDY DESIGN

We conducted a scoping review of 11 meta-analyses and systematic reviews of social connections as possible determinants of cognitive decline in older adults with or at risk of developing ADRD. We also examined eight systematic reviews of technology-based and other social interventions in persons with ADRD.

STUDY RESULTS

The strongest evidence for an association of social connections with lower risk of cognitive decline was related to social engagement and social activities. There was also evidence linking social network size to cognitive function or cognitive decline, but it was not consistently significant. A number of, though not all, studies reported a significant association of marital status with risk of ADRD. Surprisingly, evidence showing that social support reduces the risk of ADRD was weak. To varying degrees, technology-based and other social interventions designed to reduce loneliness in people with ADRD improved social connections and activities as well as quality of life but had no significant impact on cognition. We discuss strengths and limitations of the studies included.

CONCLUSIONS

Social engagement and social activities seem to be the most consistent components of social connections for improving cognitive health among individuals with or at risk for ADRD. Socially focused technology-based and other social interventions aid in improving social activities and connections and deserve more research.

Exploring key determinants of health among individuals with serious mental Illness: qualitative insights from a first episode psychosis cohort, 20 years postdiagnosis

BACKGROUND

Individuals with serious mental illness (SMI) are more likely to experience functional decline, low well-being, comorbidities, shorter lifespan, and diminished quality of life than the general population. This qualitative study explores determinants of health that individuals with SMI perceive as important to their health, well-being, and ability to live a meaningful life.

METHOD

We conducted interviews with 13 individuals with early detected first episode psychosis as part of a 20-year follow-up study of a larger cohort. Interview data were analyzed using qualitative content analysis.

RESULTS

Analysis identified two themes comprising eight categories representing determinants of health. The first theme reflected management of mental and physical health. Categories in this theme were: access to mental healthcare adapted to individual needs, strategies during deterioration, use of psychotropic medication, maintenance of physical health and lifestyle. The second theme reflected social health determinants in coping with mental illness and comprised three categories: family and friends, engaging in meaningful hobbies and activities, and the influence of employment on mental health.

CONCLUSIONS

Individuals with SMI outlined mental, physical, and social determinants of health that were important for their health, well-being, and ability to live a meaningful life. In future clinical practice, coordinated care addressing the complexity of health determinants will be important.

Retinal Neurodegeneration as a Potential Biomarker of Accelerated Aging in Schizophrenia Spectrum Disorders

BACKGROUND AND HYPOTHESES

Several biological markers are believed to reflect accelerated aging in schizophrenia spectrum disorders; however, retinal neural changes have not yet been explored as potential CNS biomarkers of accelerated aging in this population. The aim of this study was to determine whether retinal neural layer thinning is more strongly related to age in schizophrenia and schizoaffective disorder patients (SZ) than in a psychiatrically healthy control group (CON).

STUDY DESIGN

Schizophrenia (n = 60) and CON participants (n = 69) underwent spectral domain optical coherence tomography (OCT) scans to examine the following variables in both eyes: retinal nerve fiber layer (RNFL) thickness, macula central subfield (CSF) thickness, macula volume, ganglion cell layer-inner plexiform layer (GCL-IPL) thickness, optic cup volume, and cup-to-disc ratio. Eleven participants in each group had diabetes or hypertension.

STUDY RESULTS

Significant negative relationships between age and RNFL thickness, macula volume, and GCL-IPL thickness were observed in the SZ group, while no significant relationships were observed in the CON group. However, many of the findings in the SZ group lost significance when participants with diabetes/hypertension were removed from analyses. A notable exception to this was that the age × SZ interaction accounted for a unique proportion of variance in GCL-IPL thinning over and above the effect of diabetes/hypertension.

CONCLUSIONS

The results suggest that retinal atrophy occurs at an increased rate in schizophrenia spectrum disorders, potentially reflecting accelerated aging inherent to these conditions, with considerable contributions from systemic medical diseases closely linked to this population.

Schizophrenia: A Review of Social Risk Factors That Affect Women

Social risk factors are long-term or repeated environmental exposures in childhood and youth that change the brain and may, via epigenetic effects, change gene expression. They thus have the power to initiate or aggravate mental disorders. Because these effects can be mediated via hormonal or immune/inflammatory pathways that differ between men and women, their influence is often sex-specific. The goal of this narrative review is to explore the literature on social risk factors as they affect women with schizophrenia. We searched the PubMed and Scopus databases from 2000 to May 2023 using terms referring to the various social determinants of health in conjunction with "women" and with "schizophrenia". A total of 57 studies fulfilled the inclusion criteria. In the domains of childhood and adult abuse or trauma, victimization, stigma, housing, and socioeconomics, women with schizophrenia showed greater probability than their male peers of suffering negative consequences. Interventions targeting appropriate housing, income support, social and parenting support, protection from abuse, violence, and mothering-directed stigma have, to different degrees, yielded success in reducing stress levels and alleviating the many burdens of schizophrenia in women.