Work-related suicide: Evolving understandings of etiology & intervention.

Previously published analyses of suicide case investigations suggest that work or working conditions contribute to 10%-13% of suicide deaths. Yet, the way in which work may increase suicide risk is an underdeveloped area of epidemiologic research. In this Commentary, we propose a definition of work-related suicide from an occupational health and safety perspective, and review the case investigation-based and epidemiologic evidence on work-related causes of suicide. We identified six broad categories of potential work-related causes of suicide, which are: (1) workplace chemical, physical, and psychosocial exposures; (2) exposure to trauma on the job; (3) access to means of suicide through work; (4) exposure to high-stigma work environments; (5) exposure to normative environments promoting extreme orientation to work; and (6) adverse experiences arising from work-related injury or illness. We summarise current evidence in a schema of potential work-related causes that can also be applied in workplace risk assessment and suicide case investigations. There are numerous implications of these findings for policy and practice. Various principle- and evidence-based workplace intervention strategies for suicide prevention exist, some of which have been shown to improve suicide-prevention literacy, reduce stigma, enhance helping behaviours, and in some instances maybe even reduce suicide rates. Prevailing practice in workplace suicide prevention, however, overly emphasises individual- and illness-directed interventions, with little attention directed to addressing the working conditions that may increase suicide risk. We conclude that a stronger emphasis on improving working conditions will be required for workplace suicide prevention to reach its full preventive potential.

Workplace-related determinants of mental health in food and bar workers in Western, high-income countries: A systematic review.

BACKGROUND: This review synthesizes evidence from etiologic and intervention studies of workplace-related determinants of mental health in workers in food and bar workers in the hospitality industry in Western high-income countries. METHODS: Peer-reviewed literature published between January 2000 and August 2023 was gathered from five bibliographic databases. Any study design was eligible. Study quality was assessed using the Joanna Briggs Institute tools for appraisal. RESULTS: A narrative analysis was conducted for 26 included studies (total n = 15,069 participants) across Australia (3), Ireland (1), Norway (1), Spain (2), the United States (17) and the United Kingdom (2). Individual and task-related factors such as high emotional job demands and low job control were associated with high burnout and depression. Uncivil and hostile interpersonal interactions with customers, management, and colleagues were found to contribute to poor mental health outcomes, including depression, anxiety, and burnout. CONCLUSION: Findings from included studies highlight the impact of workplace culture, including management practices and workplace social support, on mental health. Organization-level interventions may therefore be most effective for addressing individual, interpersonal, and organizational determinants of mental health in food and bar occupations, particularly when implemented as part of broader organizational efforts to support health and wellbeing. Industry-wide policy changes may also be necessary to address structural concerns, including job and financial insecurity, job strain and access to benefits, such as secure sick leave and minimum contract hours.

Workplace Injury Compensation and Mental Health and Self-Harm Outcomes: A Systematic Review.

Workers' compensation systems aim to financially support injured workers. However, seeking compensation often leads to poorer physical and mental health outcomes. This review examines previous studies to investigate the relationship between workers' compensation and mental health and self-harm outcomes. A three-tiered search strategy across five databases identified studies that examined workers' compensation claims as an exposure or risk factor, with outcomes related to mental health, self-harm and suicidality. Nine full-text studies were included; however, heterogeneity limited generalizability. Most studies supported an association between pursuing compensation and poorer mental health and self-harm outcomes. Some studies attributed this to specific aspects of the system such as justice perception and navigation of the claims system. Findings suggest an association between workers' compensation and mental health or self-harm outcomes. Inconclusive findings highlight the need for further research. Understanding the psychiatric impacts of pursuing compensation is crucial to help formulate a more accessible compensation system.

Impact of informal caregiving on depressive symptoms among a national cohort of men.

BACKGROUND: There is evidence that unpaid caregiving can have negative effects on the mental health of female caregivers; however, evidence of impacts on male caregivers is limited. This study addressed this gap by examining associations between becoming a caregiver and depressive symptoms among men. METHODS: We used data from waves 1-2 (2013, 2016) of the Longitudinal Study of Australian Male Health (Ten to Men). Effects of incident caregiving on depressive symptoms were estimated using augmented inverse probability treatment weighting, with adjustment for potential confounders. Incident caregiving was assessed as a binary variable (became a caregiver vs not), and depressive symptoms were measured using the Patient Health Questionnaire (moderate to severe depressive symptoms; yes, no). Main analysis was prospective, drawing on wave 1 (caregiving) and wave 2 (depressive symptoms), and sensitivity analyses modelled cross-sectional associations. RESULTS: In the main analysis, incident caregiving in wave 1 was associated with depressive symptoms in the subsequent wave, with an average treatment effect of 0.11 (95% CI 0.06, 0.17) and equating to a risk ratio of 2.03 (95% CI 1.55, 2.51). Associations were robust to several sensitivity analyses, with cross-sectional associations supporting the main prospective analyses. CONCLUSION: These results provide evidence of the association between caregiving and depressive symptoms among male caregivers. This has important implications for policy and support programmes. As we seek to shift caregiving responsibilities toward a more gender-equal distribution of care, policy must recognise that, like female caregivers, male caregivers also experience mental health impacts related to their caregiving role.

Unpaid caregiving and mental health during the COVID-19 pandemic-A systematic review of the quantitative literature.

The COVID-19 pandemic imposed additional and specific challenges on the lives and wellbeing of informal unpaid carers. Addressing an important gap in the existing literature, this systematic review (prospectively registered with PROSPERO CRD42022376012) synthesises and evaluates the quantitative evidence examining the association between unpaid caregiving and mental health (compared to non-caring), during the pandemic. Five databases were searched (Medline, PsycInfo, EMBASE, Scopus, Web of Science) from Jan 1, 2020, to March 1, 2023. Population-based, peer-reviewed quantitative studies using any observational design were included, with screening, data extraction and quality assessment (amended NOS) independently conducted by two reviewers. Of the 3,073 records screened, 20 eligible studies (113,151 participants) were included. Overall quality of evidence was moderate. Narrative synthesis was complemented by Effect-direction and Albatross plots (given significant between-study heterogeneity precluded meta-analysis). Results indicate that the mental health of informal carers, already poorer pre-COVID compared to non-caregivers, was disproportionally impacted as a result of the pandemic and its associated public health containment measures. This review highlights the vulnerability of this group and should motivate political will and commensurate policies to ensure unpaid caregivers are better supported now, in the medium term, and crucially if, and when, another global public health emergency emerges.

Trajectories of job insecurity and the probability of poorer mental health among prime working-age Australian women and men.

Precarious and insecure employment arrangements are important social determinants of health. Prior evidence has consistently found perceived job insecurity to be associated with poorer mental health. Nonetheless, several key under-researched areas remain in the existing evidence base. This study addresses some of these gaps by examining trajectories of job (in)security and assessing the effect of various persistent job security trajectories on subsequent mental health of both men and women. Utilising 15 waves of data from the Household, Income and Labour Dynamics in Australia (HILDA) Survey, we employed group-based trajectory modelling (GBTM) to identify trajectories of job (in)security through men and women's prime working years (from baseline age of 28-38yrs to 41-51yrs) across 14 years (waves 5-18), before subsequently examining the associations between these estimated trajectories and mental health at wave 19 (aged 42-52yrs). We identified four distinct trajectories of job (in)security for both men and women: persistently secure, becoming more secure, becoming less secure, and persistently insecure. Examining the association between these trajectories and mental health, we found that chronic exposure to any amount of persistent job insecurity (improving, worsening or persistently insecure) is detrimental to the mental health of both men and women. Furthermore, a somewhat incremental or dose dependant effect was found, with persistent job insecurity associated with the largest declines in mental health scores. Given mental health disorders are a substantial cause of disability globally, our study provides evidence that developing policy and practice interventions to reduce job insecurity (as an increasingly recognised and highly modifiable social determinant of mental health) has considerable potential to enact positive population health improvements.

Self-Harm Among 17-Year-Old Adolescents With/Without Disabilities in the United Kingdom.

Background: Self-harm is a critical public health issue for adolescents/young adults. Aims: To estimate the prevalence of self-harm among adolescents with/without disabilities in the United Kingdom. Method: Secondary analysis of data collected at age 17 in the UK's Millennium Cohort Study. Results: Prevalence of self-harm was significantly greater among adolescents with disabilities for suicide attempts and six forms of self-harming behaviors. The lifetime prevalence of suicide attempts was 5.3% (4.5-6.3) among adolescents without disabilities, 21.9% (18.2-26.2) among adolescents with less limiting disabilities, and 25.5% (17.2-35.9) among adolescents with more limiting disabilities. Adjusted prevalence rate ratios ranged from 5.13 (3.58-7.36) for those with mental health limitations to 1.48 (0.65-3.35) for those with mobility limitations. Similar patterns were observed for the 12-month prevalence of six self-harming behaviors. Limitations: Further studies are needed to identify potential mediators of the association between disability and self-harm that are potentially modifiable. Conclusion: Adolescents with disabilities are at markedly greater probability of suicide attempts and self-harming behaviors than their peers.

The effect of informal caring on mental health among adolescents and young adults in Australia: a population-based longitudinal study.

BACKGROUND: Young carers are people aged up to 25 years who provide unpaid care to a relative or a friend living with a long-term condition or a disability. Providing informal care is associated with poor mental health. Longitudinal evidence on this relationship among young people is scarce. To address this gap, we assessed the mental health of people aged 15-25 years when providing informal care compared with when not providing informal care. METHODS: We conducted a population-based longitudinal study using 20 years of data between 2001 and 2020 from the Household Income and Labour Dynamics in Australia (HILDA) survey. We included observations of participants aged 15-25 years with at least two observations across 20 waves of HILDA. Informal care was categorised as 0 h per week, 1-19 h per week, and 20 or more h per week. Mental health was measured using the Mental Health Inventory (MHI-5) from the 36-Item Short Form Survey (SF-36). Multivariate linear fixed-effects regression models were fitted to assess within-person changes in mental health when providing different levels of informal care. FINDINGS: Of 44 663 people with 410 658 observations who participated in HILDA waves 1 to 20, 32 726 were excluded with 351 445 observations. 11 937 young people (with 59 213 observations) were deemed eligible for this study and, of these, 8996 participants with 43 231 observations were included in the complete case analytical sample. When caring for 1-19 h per week, young carers had an MHI-5 score of -1·98 points (95% CI -3·06 to -0·89) compared with when caring for 0 h per week. Mental health was worse when caring for 20 or more h per week, with participants displaying an MHI-5 score of -3·47 points (95% CI -6·02 to -0·92) compared with when caring for 0 h per week. Our findings were consistent across sensitivity tests. INTERPRETATION: Our findings suggest potential mental health effects of informal care in young people, particularly when providing an intense amount of caregiving. Reducing young caring loads could be a possible avenue for intervention. FUNDING: Melbourne Disability Institute Scholarship, University of Melbourne Research Training Program Scholarship, Australian Research Council Discovery Early Career Researcher Award, National Health and Medical Research Council of Australia funded Centre of Research Excellence in Disability and Health.

Gorges partition diversity within New Zealand flathead Galaxias populations.

Understanding the landscape factors governing population connectivity in riverine ecosystems represents an ongoing challenge for freshwater biologists. We used DNA sequence analysis to test the hypothesis that major geomorphological features underpin freshwater-limited fish diversity in a tectonically dynamic region of New Zealand. Phylogeographic analysis of 101 Galaxias depressiceps cytochrome b sequences, incorporating 55 localities from southern New Zealand, revealed 26 haplotypes, with only one shared among rivers. We detect strong hierarchical genetic differentiation both among and within river systems. Genetic structuring is particularly pronounced across the Taieri River system (63 individuals from 35 sites, 18 haplotypes), with 92% of variation partitioned among locations. Distinctive within-river genetic clusters are invariably associated with major subcatchment units, typically isolated by substantial gorges. The anomalous distribution of a single lineage across a major drainage divide is consistent with local, tectonically driven headwater capture. We conclude that major landscape features such as gorges can strongly partition riverine fish diversity and constrain freshwater biodiversity.

The gendered associations between precarious employment and mental health in working-age Australians: A longitudinal analysis using 16 waves of the HILDA survey.

Unemployment and precarious employment (PE) are routinely found to be associated with poorer mental health. Importantly, women are over-represented in PE (due to disproportionate unpaid care demands), yet a gender lens has been lacking in much of the extant literature. This study addresses several gaps by reconsidering how PE can be conceptualised from a gender perspective and examining the impact of differing levels of multidimensional PE on the mental health of working-age Australians. Utilising sixteen annual waves (2005-2020) of the HILDA survey, this longitudinal study employed mixed-effects analysis and Mundlak modelling to examine the association between PE and mental health in working-age (25-64yrs) adults. Mental health was assessed using the MHI-5 scale. A multidimensional PE scale (based on objective and subjective indicators) was developed and three levels of precarity were modelled. 19,442 participants were included in the analyses and all models were stratified by gender. We found women experience greater exposure to PE in Australia, and our results showed a ubiquitously strong and negative association between PE and mental health in both women and men, across all levels of PE, with a dose dependent association observed with increasing PE. Additional adjustment for prior mental health slightly attenuated effect sizes, but the strength and direction of all associations were unchanged. This study provides longitudinal evidence of the detrimental impact of PE on the mental health of working age Australians, highlighting the importance of labour regulations and employment policies to minimize PE for all adults. However, given women's differential exposure to PE, this study also reinforces the urgent need for gender-sensitive social policies to address continued inequity in the division of unpaid household labour to promote a more equitable paid labour market into the future.

The mental health impact of school bullying among young carers in Australia: a causal mediation analysis.

Informal care can exert adverse effects on the mental health of young people. Bullying victimisation is an important determinant of mental disorders. Young carers are at elevated risk of bullying. We quantify the mental health effects of informal care among Australian adolescents and the extent to which these effects are transmitted through school bullying. We used data from the Longitudinal Study of Australian Children. Participants were classified as non-carers, light carers (caring for < 10 h/week) and moderate-to-heavy carers (caring for 10 + h/week). Mental health was measured using the Kessler Psychological Distress Scale (K10). Using a counterfactual approach to mediation analysis, total effects (TE) of informal care on mental health were decomposed into natural direct effects (NDE-mental health effects not transmitted through school bullying) and natural indirect effects (NIE-mental health effects transmitted through school bullying). The TE of informal caring was 0.71 (95%CI - 0.03, 1.49) for light carers and 1.72 (95%CI 0.45, 3.02) for moderate-to-heavy carers. While school bullying explained 27% of the TE among moderate-to-heavy carers (NIE: 0.46; 95%CI 0.12, 0.91) there was weak evidence of mediation for light carers. Our findings indicate that the mental health effects of moderate-to-heavy caregiving can be reduced by school bullying interventions.

Impact of informal care on the mental health of caregivers during the COVID-19 pandemic.

BACKGROUND: Informal care can affect the mental health of caregivers. The COVID-19 pandemic precipitated many people into informal care. Little is known about the longitudinal effect of informal care throughout the pandemic. We investigate changes in mental health in relation to changes in informal care between July 2020 and September 2021. METHODS: Using data from Understanding Society, we applied fixed-effects modelling to assess mental health variations associated with changes in caregiving among 13 557 participants (50 430 observations). Hours of weekly care were categorized as 0, 1-19, ≥20. Mental health was measured using the General Health Questionnaire (GHQ-12) as a continuous score and a binary indicator. Main analyses were stratified by gender. RESULTS: Compared to when delivering 0 hours care/week, the GHQ-12 scores of women providing care for 1-19 hours/week were 0.46 points higher (95%CI: -0.11, 1.09), while their mental health scores were 0.99 higher (95%: 0.08, 1.90) when caring for ≥20 hours/week. Changes on the binary GHQ-12 measure were only evident for women when providing ≥20 hours of weekly care. These changes were not substantial among men. CONCLUSION: Informal care adversely impacted the mental health of women carers during the COVID-19 pandemic. Support programmes for informal carers should focus on alleviating caregiving loads in women.

Corrigendum to "Suicide in first-generation Australian migrants, 2006-2019: a retrospective mortality study" [Lancet Regional Health, Western Pacific 39 (2023), 100845].

[This corrects the article DOI: 10.1016/j.lanwpc.2023.100845.].

Effectiveness of the Australian MATES in Construction Suicide Prevention Program: a systematic review.

Suicide is a major public health issue globally. The World Health Organization has called for nations to create comprehensive national suicide prevention strategies including multisectoral collaboration, awareness raising, advocacy and capacity building. The workplace provides opportunity and structure for suicide prevention programs. However, many of these programs are poorly documented and evaluated. The MATES in Construction (MATES) program is a multimodal workplace-based suicide prevention program designed for and by the construction industry. This systematic review examined the available evidence for the effectiveness of the MATES program and is reported according to PRISMA guidelines. A literature search resulted in the inclusion of 12 peer-reviewed articles published between January 2010 and February 2023 containing primary data of evaluations of MATES. There was evidence of the effectiveness of the MATES program in improving mental health and suicide prevention literacy, helping intentions and reducing stigma. The results highlighted the importance of worker-to-worker peer approaches with workers consistently stating that supervisors were the least trusted resources for mental health and suicide concerns. Favourable results were found in relation to reduced suicide risk in the construction industry. The evidence base for MATES is limited in terms of causal inference with very few controlled evaluations and no experimental studies having been conducted to date. Improved understanding of how the program motivates volunteers, their experiences and research on the longer-term impacts of the program on the industry is required.

Gender and care: Does gender modify the mental health impact of adolescent care?

Young carers are people aged 25 years or less who deliver unpaid informal care to a family or a friend living with a physical or mental illness, a disability, problems related to alcohol/substance use or an elderly relative. Young caring has negative impacts on the mental health of adolescents. Gender patterns underpinning this association have not been explored. We examined gender differences in the mental health effect of informal care among Australian adolescents. We used data from the Longitudinal Study of Australian Children (LSAC). Participants were categorised as non-carers or young carers at 14/15 years old. Although we acknowledge that gender is non-binary, information about gender identity was not collected in LSAC during adolescence. We used the study child's sex as reported at age 14/15 years to categorise adolescents as boys or girls. Mental health was measured using the Kessler Psychological Distress scale (K10) at ages 18/19. We conducted multivariable linear regression models and assessed effect modification by fitting an interaction term between gender and informal care. Informal care was associated with poorer mental health among boys (ß: 0.97, 95%CI: -0.01, 1.95), and girls (ß: 1.66, 95%CI: 0.63, 2.69). Overall, in comparison to boy non-carers, girl carers had the highest level of distress (ß: 4.47; 95%CI: 3.44, 5.51), yielding high predicted scores of K10. While the mental health effects of young care were stronger for girls, there was limited evidence of effect modification as the difference in mental health disparities due to informal care between girls and boys was small (ß: 0.69) with high uncertainty levels (95%CI: -0.72, 2.11). Psychological distress scores were higher for girls than boys in both caring categories. Support strategies should focus on identifying and supporting boy and girl carers to reduce the adverse mental health impact of young informal care.

ebony underpins Batesian mimicry in melanic stoneflies.

The evolution of Batesian mimicry - whereby harmless species avoid predation through their resemblance to harmful species - has long intrigued biologists. In rare cases, Batesian mimicry is linked to intraspecific colour variation, in which only some individuals within a population resemble a noxious 'model'. Here, we assess intraspecific colour variation within a widespread New Zealand stonefly, wherein highly melanized individuals of Zelandoperla closely resemble a chemically defended aposematic stonefly, Austroperla cyrene. We assess convergence in the colour pattern of these two species, compare their relative palatability to predators, and use genome-wide association mapping to assess the genetic basis of this resemblance. Our analysis reveals that melanized Zelandoperla overlap significantly with Austroperla in colour space but are significantly more palatable to predators, implying that they are indeed Batesian mimics. Analysis of 194,773 genome-wide SNPs reveals an outlier locus (ebony) strongly differentiating melanic versus non-melanic Zelandoperla. Genotyping of 338 specimens from a single Zelandoperla population indicates that ebony explains nearly 70% of the observed variance in melanism. As ebony has a well-documented role in insect melanin biosynthesis, our findings indicate this locus has a conserved function across deeply divergent hexapod lineages. Distributional records suggest a link between the occurrence of melanic Zelandoperla and the forested ecosystems where the model Austroperla is abundant, suggesting the potential for adaptive shifts in this system underpinned by environmental change.

Does employment status mediate the association between disability status and mental health among young adults? Evidence from the Household, Income and Labour Dynamics in Australia (HILDA) survey.

OBJECTIVE: Young adults with disabilities are less likely to be employed and more likely to have poor mental health than peers without disabilities. Growing evidence shows that social determinants of health may be causally related to mental health outcomes of people with disabilities. We aimed to assess if the disability to mental health association was mediated by employment status among young adults aged 20-35 years. METHODS: Four consecutive years (2016-2019) of data from the Household, Income and Labour Dynamics in Australia survey were used to conduct a causal mediation analysis. We decomposed the total causal effect of disability status on mental health (Short Form-36 Mental Health Inventory-5) into the natural direct effect from disability to mental health and the natural indirect effect representing the pathway through the employment mediator (being employed; being unemployed or wanting to work). RESULTS: 3435 participants (3058 with no disabilities, 377 with disabilities) were included in the analysis. The total causal effect of disability status on mental health was an estimated mean decrease in mental health of 4.84 points (95% CI -7.44 to -2.23). The indirect effect, through employment status, was estimated to be a 0.91-point decline in mental health (95% CI -1.50 to -0.31). CONCLUSIONS: Results suggest disability has an effect on the mental health of young adults; a proportion of this effect appears to operate through employment. The mental health of young adults with disabilities could potentially be improved with interventions to improve employment outcomes among this group, and by supporting individuals with disabilities into suitable employment.

Suicide in first-generation Australian migrants, 2006-2019: a retrospective mortality study.

Background: This study addressed the limited understanding of suicide risk and patterns among migrants in Australia. It examined national-level suicide rates and trends in the Australian population to identify migrant groups which are disproportionately affected by suicide. Methods: The National Coronial Information System was used to identify suicide cases from 2006 to 2019. Incident rate ratios (IRR) with 95% confidence intervals (CI) evaluated suicide risk for migrant groups compared to Australian-born and migrants from English-speaking countries. Age-standardised suicide rates (ASR) per 100,000 and average annual percentage change (AAPC) were calculated to compare suicide rates and trends. Findings: Compared to the Australian-born population, all migrant males and females had significantly lower suicide risk, except females from Oceania countries. Females from European (IRR 1.28, 95% CI 1.13, 1.14) and Oceanian countries (IRR 1.25; 95% CI 0.95, 1.66) had an elevated suicide risk compared to female migrants from English-speaking countries. Male migrants from Oceania (ASR 20.4, AAPC 1.0 (-3.6, 5.8)) and Africa (ASR 18.0, AAPC -0.4 (-5.5, 4.9)) have high ASR with no significant changes in trend over the study duration. Female African migrants had an ASR of 5.3 per 100,000, which increased by 8% (95% CI 1.4, 15.0) between 2006 and 2019. Interpretation: Migrants from Oceania and African countries are disproportionately affected by suicide mortality compared to other migrant groups in Australia. Further research is needed to identify the risk factors and develop suicide prevention strategies for these groups. Funding: Suicide Prevention Australia, Australian Research Council.

Suicide in the Australian Mining Industry: Assessment of Rates among Male Workers Using 19 Years of Coronial Data.

Background: International evidence shows that mining workers are at greater risk of suicide than other workers; however, it is not known whether this applies to the Australian mining sector. Methods: Using data from the National Coronial Information System, rates of suicide among male mining workers were compared to those of three comparators: construction workers, mining and construction workers combined, and all other workers. Age-standardized suicide rates were calculated for 2001-2019 and across three intervals '2001-2006', '2007-2011', and '2012-2019'. Incidence rate ratios for suicide were calculated to compare incidence rates for mining workers, to those of the three comparative groups. Results: The suicide rate for male mining workers in Australia was estimated to be between 11 and 25 per 100,000 (likely closer to 25 per 100,000) over the period of 2001-2019. There was also evidence that the suicide rate among mining workers is increasing, and the suicide rate among mining workers for the period 2012-2019 was significantly higher than the other worker group. Conclusions: Based on available data, we tentatively deduce that suicide mortality among male mining workers is of concern. More information is needed on both industry and occupation of suicide decedents in order to better assess whether, and the extent to which, mining workers (and other industries and occupations) are at increased risk of suicide.