Relative Risk Of Suicide Research Articles

Dementia subtypes and suicidality: A systematic review and meta-analysis.

Recent research has highlighted a link between dementia and increased risk of suicidal ideation, suicide attempts and suicide deaths. Understanding the relative risk of suicide between subtypes of dementia is important for services to offer appropriate intervention. We searched five databases from inception to July 2023 for peer-reviewed publications reporting suicidal ideation, suicide attempt or death by suicide for at least two dementia subtypes. Meta-analyses compared suicidality between subtypes of dementia with Alzheimer's Disease (AD). From 4983 studies identified, 12 met inclusion criteria. Pooling data, people with Vascular Dementia were significantly more likely to experience suicidal ideation (OR= 2.02 [95 % CI= 1.06;3.8]) and attempt suicide (OR=1.94 [95 % CI= 1.28;2.94]) than people with AD, but not die by suicide (OR= 1.05 [95 % CI= 0.69;1.59]). People with Dementia with Lewy Bodies were significantly more likely to report suicidal ideation (OR= 1.56 [95 % CI= 1.09;2.23]) than AD but not attempt suicide (OR= 1.12 [95 % CI= 0.83;1.50]). People with Frontotemporal Dementia were significantly more likely to attempt suicide (OR= 2.42 [95 % CI= 1.02;5.72]) than people with AD but not report suicidal ideation (OR= 1.67 [95 % CI= 0.34;8.33]). People with Mixed Dementia were significantly more likely to attempt suicide (OR= 2.83 [95 % CI= 1.52;5.27]) than people with AD but not report suicidal ideation (OR = 1.65 [95 % CI= 0.5;5.46]). Further research is needed to understand what underlies the increased risks of suicidal ideation and suicide attempts for rarer subtypes.

Does State-Level Structural Racism Impact Risk for Suicide Attempts Among US Adolescents Across Race and Ethnicity?

Our study examined the association between state-level structural racism and past year rates of suicide ideation (SI) and suicide attempts (SA) among non-Hispanic Black, Hispanic, and non-Hispanic White adolescents. This secondary analysis used state- and individual-level linked data combining multiple years (ie, 2011-2019) of the Youth Risk Behavior Surveys, the 2019 American Community Survey, and the 2019 state-level Structural Racism Index (SRI), a composite measuring state-level Black-White (B-W) and Hispanic-White (H-W) racial inequities across 5 domains: residential segregation, incarceration rates, educational attainment, economic indicators, and employment status. A series of generalized estimating equations were used to examine the association between structural racism and past-year SI and past-year SA, with race/ethnicity as a moderator, adjusting for state- and individual-level covariates, among US adolescents. Negative associations were observed between B-W SRI with SI (adjusted b [95% CI]=-0.011 [-0.017,-0.003], p=.004), and SA (-0.011 [-0.018,-0.004], p= .002), as well as between H-W SRI with SI (-0.008 [-0.016,-0.0002], p= .044), and SA (-0.011 [-0.018,-0.004], p= .001). These associations were significantly modified by race and ethnicity for both B-W SRI and H-W SRI. Both Black (SI=-0.011 [-0.02,-0.002]; SA=-0.011 [-0.019,-0.004]) and Hispanic (SI=-0.097 [-0.011,-0.004]; SA=-0.011 [-0.018,-0.004]) adolescents living in states with higher structural racism had lower rates of past-year SI and SA relative to White adolescents. Exploratory analyses identified a negative association between the residential segregation index and past-year SI and SA among Black and Hispanic adolescents. Meanwhile, a positive association emerged between B-W incarceration index and past-year SA, but not past-year SI, among Black adolescents. Adolescents in states with higher SRI were at lower risk for past-year SI and SA. Racial inequities across various institutions may differentially influence suicide-related risk among adolescents. Structural racism may play an important role in conferring risk for SI and SA, and its impact may vary across Black, Hispanic, and White adolescents. Attending to institutional level markers of racism may help to improve the cultural responsiveness of youth suicide prevention strategies. Study Preregistration: Does State-level Structural Racism Impact Risk for Suicidal Thoughts and Behaviors Among US Adolescents Across Race and Ethnicity? https://www.jaacap.org/article/S0890-8567(23)00124-7/fulltext DIVERSITY & INCLUSION STATEMENT: We worked to ensure sex and gender balance in the recruitment of human participants. We worked to ensure race, ethnic, and/or other types of diversity in the recruitment of human participants. We worked to ensure that the study questionnaires were prepared in an inclusive way. One or more of the authors of this paper self-identifies as a member of one or more historically underrepresented racial and/or ethnic groups in science. One or more of the authors of this paper self-identifies as a member of one or more historically underrepresented sexual and/or gender groups in science. One or more of the authors of this paper received support from a program designed to increase minority representation in science. We actively worked to promote inclusion of historically underrepresented racial and/or ethnic groups in science in our author group. While citing references scientifically relevant for this work, we also actively worked to promote sex and gender balance in our reference list. While citing references scientifically relevant for this work, we also actively worked to promote inclusion of historically underrepresented racial and/or ethnic groups in science in our reference list.

Suicide-related risk among patients using branded and generic fluoxetine: a propensity score-matched, new‐user design in Taiwan

BackgroundTo date, the clinical equivalence between branded and generic medications remains debate and may sometimes be a reason why psychiatrists are hesitant to prescribe generic medications. Depression is recognized to exacerbate suicide risk globally and selective serotonin reuptake inhibitors, such as fluoxetine are common treatment options. Therefore, this study aimed to explores differences in suicidal risks between users of branded and generic fluoxetine in Taiwan.MethodsThis cohort study used Taiwan Longitudinal Health Insurance Database, encompassing 2 million individuals covered by National Health Insurance (NHI) program. The full cohort consisted of 32,298 fluoxetine new users. Then, 7,380 branded and 7,380 propensity score matched (PSM) generic fluoxetine new users were identified. The study further utilized Cox proportional hazards models to assess risk of 5-year suicidal ideation, suicide mortality, and all-cause mortality.ResultsThe study revealed that the adjusted hazard ratios (HRs) for suicidal ideation, suicide mortality and all-cause mortality in branded users were 0.766 (95% CI, 0.497 − 1.181), 0.660 (95% CI, 0.447 − 0.975), and 0.942 (95% CI, 0.849 − 1.045), respectively, when compared with matched generic fluoxetine users. Stratified and sensitivity analyses showed the lower risk of suicide mortality in specific subgroups, such as male (adjusted HRs = 0.536, 95% CI = 0.306–0.939) and young branded users (adjusted HRs = 0.549, 95% CI = 0.334–0.904).ConclusionThis study observed trends in the prevention effects of suicide-related risks. However, only suicide mortality was statistically significant, especially in males and those aged < 40 years. These insights may assist clinicians and policymakers in decision-making.Clinical trial numberNA (This study is a cohort study utilizing the national health insurance database, not a clinical trial).

An Exploration of the Co-Occurrence of Hallucinations and Suicidal Mental Imagery Among Psychiatrically Hospitalised Adolescents at High Risk for Suicide.

Adolescents with psychosis-spectrum symptoms are at particularly high risk for suicide, however, little is known about how suicidal cognitions manifest in this population. Suicidal cognitions can occur as verbal thoughts and/or mental images of suicide, and mental images may be indicative of a higher risk for suicidal behaviours. Suicidal mental imagery could be a salient and important suicide-related risk factor for adolescents with hallucinations in particular, however, the co-occurrence of these phenomena has yet to be studied. In a sample of psychiatrically hospitalised adolescents, we hypothesize that hallucinations will be associated with increased suicidal mental imagery and suicide attempts. This chart review study included data from 219 adolescents admitted to a psychiatric inpatient unit. Adolescents completed an assessment battery probing hallucinations, suicidal cognitions, and suicide attempts. Adolescents with past-month hallucinations had higher rates of past-week suicidal verbal thoughts and suicidal mental imagery, but not suicide attempts, compared to those without hallucinations. Adolescents with hallucinations reported a younger onset of suicidal mental imagery, and they endorsed more frequent imagery. Past-month hallucinations were significantly and positively associated with suicidal mental imagery, beyond the effects of internalising symptoms. Suicidal mental imagery was positively associated with past-week suicide attempts, but past-month hallucinations were not. Our findings indicate that hallucinations are linked to suicidal mental imagery, an important yet under-studied risk factor for suicidal behaviour. These data highlight the need for more research exploring suicidal mental imagery among high-risk adolescents experiencing hallucinations to inform suicide risk assessment and intervention.

Can large language models be sensitive to culture suicide risk assessment?

Suicide remains a pressing global public health issue. Previous studies have shown the promise of Generative Intelligent (GenAI) Large Language Models (LLMs) in assessing suicide risk in relation to professionals. But the considerations and risk factors that the models use to assess the risk remain as a black box. This study investigates if ChatGPT-3.5 and ChatGPT-4 integrate cultural factors in assessing suicide risks (probability of suicidal ideation, potential for suicide attempt, likelihood of severe suicide attempt, and risk of mortality from a suicidal act) by vignette methodology. The vignettes examined were of individuals from Greece and South Korea, representing countries with low and high suicide rates, respectively. The contribution of this research is to examine risk assessment from an international perspective, as large language models are expected to provide culturally-tailored responses. However, there is a concern regarding cultural biases and racism, making this study crucial. In the evaluation conducted via ChatGPT-4, only the risks associated with a severe suicide attempt and potential mortality from a suicidal act were rated higher for the South Korean characters than for their Greek counterparts. Furthermore, only within the ChatGPT-4 framework was male gender identified as a significant risk factor, leading to a heightened risk evaluation across all variables. ChatGPT models exhibit significant sensitivity to cultural nuances. ChatGPT-4, in particular, offers increased sensitivity and reduced bias, highlighting the importance of gender differences in suicide risk assessment. The findings suggest that, while ChatGPT-4 demonstrates an improved ability to account for cultural and gender-related factors in suicide risk assessment, there remain areas for enhancement, particularly in ensuring comprehensive and unbiased risk evaluations across diverse populations. These results underscore the potential of GenAI models to aid culturally sensitive mental health assessments, yet they also emphasize the need for ongoing refinement to mitigate inherent biases and enhance their clinical utility.

The Associations Between Intimate Partner Violence and Mental Health Outcomes Among Sexual Minority Men: A Systematic Review and Meta-Analysis.

Sexual minority men (SMM) experience intimate partner violence (IPV) at a substantially high rate and also bear high burdens of adverse mental health outcomes. This systematic review and meta-analysis aimed to consolidate existing evidence on the associations between experiencing IPV and adverse mental health outcomes (depressive symptoms, anxiety, stress, etc.) among SMM. Following the Preferred Reporting Items For Systematic Reviews and Meta-Analyses guideline, we identified 22 published studies encompassing data from 18,454 individuals, all of which were cross-sectional in design and half of which were conducted in the U.S. We found that experiencing IPV was associated with an increased risk of depressive symptoms and anxiety with a pooled Adjusted Odds Ratios (AORs) of 1.71 (95% CI [1.43, 2.05]) and 1.89 (95% CI [1.46, 2.43]), respective. Studies also found that IPV was positively associated with suicide-related risk (AOR = 2.71, 95% CI [2.21, 3.32] and perceived loneliness. Studies varied in their IPV measures and recall periods and used diverse mental health measurement tools like PHQ-9/GAD-7, Perceived Stress Scale, and the Suicide Behaviors Questionnaire-Revised. This systematic review and meta-analysis revealed an urgent need to examine the effects of IPV on SMM's mental well-being in low- and middle-income countries using standardized IPV measurement tools. Future research should employ a longitudinal design to track the long-term effects of IPV on the mental well-being of SMM and explore potential interventions for mitigating these impacts over time. These insights are crucial for enhancing IPV screening within healthcare settings and identifying key intervention targets aimed at improving the mental health of SMM.

Potential Harms of Responding to Youth Suicide Risk in Schools.

The potential harms related to interventions for adults with suicide-related risk, particularly hospitalization, have been well documented. Much less work has focused on the potential harms related to interventions with youth struggling with suicidal thoughts and behaviors. Young people are most likely to receive mental health services in schools, which are recognized as meaningful sites for effective suicide prevention work. However, no overviews have conceptualized the potential harms to youth when schools engage in ineffective suicide prevention efforts. In this article, we discuss three prominent overlapping areas of potential harms: (1) privacy-related, (2) relationship-related, and (3) mental health-related. We then discuss key factors thought to influence the development and maintenance of these potential harms. We conclude by noting ways in which school-based mental health providers may attempt to reduce unintentional harms in this area, with an overarching goal of helping support school mental health providers and the youth they serve.

The association of pain screening and pain level with suicide among US veterans with comorbid musculoskeletal and bipolar disorder diagnoses

BackgroundHigh suicide rates are documented among persons with bipolar disorder diagnoses and pain diagnoses, but few studies have examined the association of pain with suicide mortality in individuals with comorbid pain and bipolar disorders. This study assessed the association of pain screening and pain severity with suicide mortality among veterans with comorbid bipolar and musculoskeletal disorder (MSD) diagnoses. MethodsA retrospective cohort study was conducted on 168,021 patients within the Veterans Health Administration (VHA) who received an MSD diagnosis from 2000 to 2015 and had a bipolar disorder diagnosis. Pain severity, comorbidities, demographics, and suicide mortality were extracted from VHA databases. Poisson regression examined relative risk of suicide by the presence pain screening and pain severity ratings. ResultsPain was assessed in 72.73 % of veterans. Suicide risk was greater in those not assessed (0.98 % versus 0.77 % in assessed group). However, this result did not persist after adjusting for covariates (RR = 1.06). Among those assessed, higher suicide risk was associated with moderate (RR = 1.10), severe pain (RR = 1.06), and no pain (reference) relative to mild pain (RR = 0.99). Major depression, substance use disorders, and prescribed opioids and benzodiazepines increased risk. LimitationsData were obtained from medical records; diagnoses were not confirmed via formal assessment, and no information was available on actual medication use or purpose. Over 25 % of the sample were missing pain severity ratings, which could have affected results. ConclusionsSuicide risk factors among persons with bipolar disorder are complex and multifactorial. Providers should prioritize suicide prevention efforts following new onset or worsening pain.

Childhood adversities and suicidal ideation among young adults with serious mental illnesses: The mediating roles of perceived stress, dispositional hope, and mental health hope

BackgroundRates of suicidality are high among young adults and minoritized groups are disproportionately affected. Despite evidence that adverse childhood experiences (ACEs) may increase suicide-related risk, the underlying mechanisms through which ACEs may impact suicidal ideation (SI) remain poorly understood, especially among marginalized young adults with serious mental illnesses (SMI) such as schizophrenia-spectrum, major depressive, and bipolar disorders. This study examines associations between ACEs and SI, and whether perceived stress, dispositional hope, and mental health hope may mediate the relationship. MethodsThe sample consisted of 114 young adults of color with SMI who participated in a larger randomized trial. Data were analyzed using a structural equation modeling (SEM) approach. ResultsYoung adults with more ACEs reported higher perceived stress, which in turn, was associated with more SI. Higher perceived stress was associated with lower dispositional and mental health hope. Although dispositional hope was negatively associated with SI on a bivariate level, neither dispositional nor mental health hope was significantly associated with SI in the multivariate SEM. This suggests that over and above perceived stress, hope does not appear to be associated with SI. LimitationsKey limitations include a cross-sectional design, a modest sample size, and an assessment of select ACEs. ConclusionAddressing stress-related processes may be one promising target for suicide prevention efforts in the context of ACEs. Policy interventions focused on the allocation of resources and changing environments that are stress and trauma-inducing are needed to reduce the occurrence of ACEs and their negative sequelae.

Recognition of schizophrenia and quality of treatment during the COVID-19 pandemic: A Danish nationwide study

BackgroundThe COVID-19 pandemic may have exacerbated the state of ill-health among patients with schizophrenia. We examined the number of patients diagnosed with schizophrenia, the number of hospital admissions and outpatient contacts and the quality of treatment during the pandemic in comparison with the previous years. MethodsWe identified patients ≥18 years old registered in the Danish Schizophrenia Registry from 2016 to 2022. Using a generalized linear model, we estimated prevalence ratios (PR) and 95 % confidence intervals (CI) for each variable of interest. ResultsA minor reduction in the number of new cases, admissions and outpatient contacts was seen during the first lockdown; however, there was no overall change across the pandemic period compared with the pre-pandemic period. We found no change in the proportion of patients who were interviewed using a diagnostic tool (37.0 % during pandemic vs 37.9 % pre-pandemic; PR = 0.87; 95 % CI 0.68–1.12) or received family intervention (57.7 % vs 57.1 %; PR = 0.97; 95 % CI 0.81–1.15), and no decrease was observed in the proportion of patients assessed for social support. Furthermore, no change in the proportion of patients re-admitted within 30 days (35.9 % vs 35.0 %; PR = 0.96; 95 % CI 0.88–1.07) or screened for suicide risk in relation to discharge (55.2 % vs 56.8 %; PR = 0.96; 95 % CI 0.97–1.09) was observed. ConclusionsRecognition and treatment of schizophrenia was minimally affected during the first lockdown, but across the pandemic period no overall change was observed. The quality of treatment of schizophrenia was unchanged.

The global burden of suicide mortality among people on the autism spectrum: A systematic review, meta-analysis, and extension of estimates from the Global Burden of Disease Study 2021

We aimed to quantify the risk, mortality, and burden of suicide among autistic persons. We searched PubMed, Embase, and PsycINFO on 5th April 2023 for sources reporting the relative risk (RR) of suicide or suicide attempt among autistic persons (PROSPERO registration: CRD42021265313). Autism spectrum prevalence and suicide mortality and years of life lost (YLLs), were sourced from the Global Burden of Disease Study 2021. RRs pooled via meta-regression and health metrics estimates were used to estimate the excess suicide mortality and YLLs among autistic persons. We sourced 983 unique studies of which ten studies met inclusion criteria, consisting of 10.4 million persons. The pooled RR for suicide for autistic persons was 2·85 (95% UI: 2·05–4·03), which was significantly higher for autistic females than autistic males. No evidence of publication bias was detected via inspection of funnel plot and Egger's test. Globally, we estimated 13 400 excess suicide deaths among autistic persons in 2021, equating to 1·8% of all suicide deaths and 621 000 excess YLLs. Studies were limited in number and geographical coverage. Effective suicide prevention strategies for autistic persons may substantially reduce the fatal burden of suicides globally and reduce the health burden experienced within this population.

Impact of the COVID-19 pandemic on suicide-related risk among college students: A cross-sectional analysis

This study aimed to investigate the factors contributing to suicide-related risks among college students during a stressful life event, specifically the COVID-19 pandemic. Employing a Classification and Regression Tree (CART) model, data from 808 college students were analyzed, revealing key interactions and predictive insights into suicide-related risk. Results indicated that preexisting depression emerged as the most significant risk factor, followed by anxiety, discrimination, stress, and younger age. These findings emphasize the importance of preventive measures targeting depression and anxiety to enhance college students’ mental health and well-being. The study’s implications extend to informing future research, practical interventions, and policy-making efforts addressing suicide-related risk among college students.

Share of Adult Suicides After Recent Jail Release

Although people released from jail have an elevated suicide risk, the potentially large proportion of this population in all adult suicides is unknown. To estimate what percentage of adults who died by suicide within 1 year or 2 years after jail release could be reached if the jail release triggered community suicide risk screening and prevention efforts. This cohort modeling study used estimates from meta-analyses and jail census counts instead of unit record data. The cohort included all adults who were released from US jails in 2019. Data analysis and calculations were performed between June 2021 and February 2024. The outcomes were percentage of total adult suicides within years 1 and 2 after jail release and associated crude mortality rates (CMRs), standardized mortality ratios (SMRs), and relative risks (RRs) of suicide in incarcerated vs not recently incarcerated adults. Taylor expansion formulas were used to calculate the variances of CMRs, SMRs, and other ratios. Random-effects restricted maximum likelihood meta-analyses were used to estimate suicide SMRs in postrelease years 1 and 2 from 10 jurisdictions. Alternate estimate was computed using the ratio of suicides after release to suicides while incarcerated. Included in the analysis were 2019 estimates for 7 091 897 adults (2.8% of US adult population; 76.7% males and 23.3% females) who were released from incarceration at least once, typically after brief pretrial stays. The RR of suicide was 8.95 (95% CI, 7.21-10.69) within 1 year after jail release and 6.98 (95% CI, 4.21-9.76) across 2 years after release. A total of 27.2% (95% CI, 18.0%-41.7%) of all adult suicide deaths occurred in formerly incarcerated individuals within 2 years of jail release, and 19.9% (95% CI, 16.2%-24.1%) of all adult suicides occurred within 1 year of release (males: 23.3% [95% CI, 20.8%-25.6%]; females: 24.0% [95% CI, 19.7%-36.8%]). The alternate method yielded slightly larger estimates. Another 0.8% of adult suicide deaths occurred during jail stays. This cohort modeling study found that adults who were released from incarceration at least once make up a large, concentrated population at greatly elevated risk for death by suicide; therefore, suicide prevention efforts focused on return to the community after jail release could reach many adults within 1 to 2 years of jail release, when suicide is likely to occur. Health systems could develop infrastructure to identify these high-risk adults and provide community-based suicide screening and prevention.

Risk factors for suicide in patients with pancreatic ductal adenocarcinoma: A population‐based study

AbstractBackgroundPatients diagnosed with pancreatic ductal adenocarcinoma (PDAC) face a notable risk of suicide. However, comprehensive population‐based studies on suicide risk in PDAC patients have been lacking. This study seeks to explore the suicide risk in PDAC patients and identify the specific risk factors associated with suicide‐related mortality.MethodsA cohort of 101,382 PDAC patients was extracted from the Surveillance, Epidemiology, and End Results database, spanning from January 1, 2000, to December 31, 2017. The study employed the standardized mortality ratio (SMR) to assess the relative risk of suicide in PDAC patients compared to the general US population. The Nelson–Aalen estimator and the Fine and Grey method were utilized to pinpoint the risk factors linked to suicide‐specific mortality.ResultsPDAC patients exhibited a 3.51‐fold higher risk of suicide compared to the general US population. This risk demonstrated an upward trend over the years. Notably, individuals aged 70–74 years faced a significantly elevated risk of suicide (SMR = 5.14, 95% CI: 3.10–8.03). Furthermore, there were distinct peaks in suicide risk at 1–4‐ and 25–28‐month post‐diagnoses (SMR = 15.04 and 2.72, respectively). Factors, such as gender, chemotherapy status, and marital status, emerged as significant independent predictors of suicide‐specific mortality in PDAC patients.ConclusionsThis study highlights a heightened suicide risk among PDAC patients in comparison to the general US population. It underscores the crucial need for continuous monitoring of the psychological well‐being of all PDAC patients. Additionally, considering the elevated risk, the application of antidepressant therapy could be beneficial for those identified as having a higher risk of suicide.

Determining the MMPI-3 SUI scale's cross-sectional and prospective utility in suicide risk assessment.

In-depth suicide risk assessments are particularly important to long-term suicide prevention. Broadband measures of psychopathology, such as the Minnesota Multiphasic Personality Inventory (MMPI) instruments, assess suicide risk factors and various mental health comorbidities. With the recent release of the MMPI-3, the Suicidal/Death Ideation(SUI) scale underwent revisions to improve its construct validity and detection of suicide risk factors. Thus, we hypothesized the MMPI-3 SUI scale would demonstrate medium to large associations with suicidal experience and behaviors, future ideation, and interpersonal risk factors of suicide. A sample of 124 college students screened for elevated depressive symptoms completed a brief longitudinal study. Participants completed a baseline session including the MMPI-3 and criterion measures and three brief follow-ups every 2 weeks. SUI scores were most robustly associated with increased risk for past suicidal ideation, planning, and perceived burdensomeness. Prospectively assessed suicidal ideation was also meaningfully associated with SUI. SUI scale elevations indicate an increased risk of suicide-related risk factors. The MMPI-3 is a valuable tool to inform long-term suicide prevention for those experiencing elevated depressive symptoms as the SUI scale can assess past, current, and future suicide-related risk factors, including suicidal ideation and behaviors.

A protective role of urban greenspace on the association between night-time heat and suicide in Seoul, South Korea

Suicide, a leading cause of death among the youth, has shown a positive association with high temperatures. However, few studies have explored the association between tropical nights and suicide and the potential role of greenness on this association. We investigated the association between suicide and two hot night indices: hot night duration (HNd) and hot night excess (HNe), representing heat duration and excess heat during night-time. We also explored whether the association was modified by urban greenspace, measured by satellite-derived normalized difference vegetation index (NDVI), across 25 districts in Seoul, South Korea from 2000 to 2020. Based on the multi-district daily time-series data, we performed a space-time-stratified case-crossover analysis with a distributed lag linear model with lags of up to 7 d for HNd and HNe, adjusting for daily mean temperature and relative humidity. We added an interaction term between the hot night index and NDVI to assess the effect modification of greenness. In total, 14 693 suicides were included in this study. The relative risk (RR) of suicide per a 10% increase in HNd was 1.059 (95% CI: 1.017–1.103) in low NDVI areas and 1.031 (95% CI: 0.988–1.075) in high NDVI areas. The RR per a 1 °C increase in HNe was 1.011 (95% CI: 0.998–1.024) and 1.005 (95% CI: 0.992–1.018) in low and high NDVI areas, respectively. Greenspaces have expanded over time in all districts of Seoul, and the risk of suicide for night-time heat decreased over time in both low and high NDVI areas. Our findings suggest that exposure to night-time heat is associated with an increased risk of suicide, but this risk may be mitigated by greater greenspaces in urban areas. Prioritizing development and maintenance of urban greenspaces will be a critical co-benefit strategy for promoting public mental health in changing climates.

Trends in suicide mortality among prostate cancer survivors in the United States, 1975–2019

BackgroundSuicide was an important cause of death in prostate cancer. This study intended to investigate trends in suicide mortality among prostate cancer (PCa) survivors from 1975 to 2019 in the United States.MethodWe identified PCa survivors from the Surveillance, Epidemiology, and End Results (SEER) program from January 1975 to December 2019. Standardized mortality rate (SMR) was calculated d to assess the relative risk of suicide in PCa survivors compared with the general men population. Poisson regression model was performed to test for trend of SMRs. The cumulative mortality rate of suicide was calculated to assess the clinical burden of suicide mortality.Results7108 (0.2%) cases were death from suicide cause, and 2,308,923(65.04%%) cases recorded as dying from non-suicidal causes. Overall, a slightly higher suicide mortality rate among PCa survivors was observed compared with general male population (SMR: 1.15, 95%CI: 1.09–1.2). The suicide mortality rate declined significantly relative to the general population by the calendar year of diagnosis, from an SMR of 1.74(95%CI: 1.17–2.51) in 1975–1979 to 0.99(0.89–1.1) in 2015–2019 (Ptrend < 0.001). PCa survivors with aged over 84 years, black and other races, registered in registrations (including Utah, New Mexico, and Hawaii) failed to observe a decrease in suicide mortality (Ptrend > 0.05). The cumulative suicide mortality during 1975–1994 was distinctly higher than in 1995–2019(P < 0.001).ConclusionThe trend in suicide mortality declined significantly from 1975 to 2019 among PCa survivors compared with the general male population in the United States. Notably, part of PCa survivors had no improvement in suicide mortality, and additional studies in the future were needed to explore it.

The Suicide-Risk Factor – Data Query Tool (SURF-DQT): easy and handy access to the exhaustive base of highest evidence suicide risk factors

The extensive number of publications on suicide risk factors presents a practical challenge for clinicians, policy makers, and researchers to translate the research findings from academia to the improvement of individual suicide predictions and collective prevention. The Suicide Risk-Factor - Data Query Tool (SURF-DTQ) is a web application that collates organized data and helps with meta-analysis of suicidality data. Through a process of systematic review of literature according to PRISMA standards, screening and extracting studies with designs of a high level of evidence, and multi-level data synthesis, information is presented in the SURF database in a summarized, structured, and immediately relevant form. SURF allows users to search by risk factor, population, date, and indicator filters, enabling users to quickly access the most up to date and empirically grounded general or specific knowledge about suicide-related risk factors.

Risk of Suicide and Psychiatric Disorders Among Isotretinoin Users

Isotretinoin is hypothesized to contribute to the development of psychiatric disorders, but the epidemiological association and risk factors associated with psychiatric disorders among isotretinoin users remain unclear. To clarify the absolute and relative risk and risk factors associated with suicide and psychiatric disorders among isotretinoin users. PubMed, Embase, Web of Science, and Scopus were searched from inception until January 24, 2023. Randomized trials and observational studies were selected if they reported the absolute risk, relative risk, and risk factors for suicide and psychiatric disorders among isotretinoin users. Relevant data were extracted and risk of bias was evaluated at the study level using the Newcastle-Ottawa Scale. Data were pooled using inverse variance-weighted meta-analyses. Heterogeneity was measured using the I2 statistic, and meta-regression analyses were performed. Absolute risk (percentage), relative risks (risk ratios [RR]), and risk factors (RR) of suicide and psychiatric disorders among isotretinoin users. A total of 25 studies including 1 625 891 participants were included in the review and 24 in the meta-analysis. Among the included studies, participants' average age ranged from 16 to 38 years, and distribution by sex ranged from 0% to 100% male. The 1-year pooled absolute risk from between 2 and 8 studies of completed suicide, suicide attempt, suicide ideation, and self-harm were each less than 0.5%, while that of depression was 3.83% (95% CI, 2.45-5.93; I2 = 77%) in 11 studies. Isotretinoin users were less likely than nonusers to attempt suicide at 2 years (RR, 0.92; 95% CI, 0.84-1.00; I2 = 0%), 3 years (RR, 0.86; 95% CI, 0.77-0.95; I2 = 0%), and 4 years (RR, 0.85; 95% CI, 0.72-1.00; I2 = 23%) following treatment. Isotretinoin was not associated with the risk of all psychiatric disorders (RR, 1.08; 95% CI, 0.99-1.19; I2 = 0%). Study-level meta-regression found that studies with participants of older age reported lower 1-year absolute risk of depression, while those with a higher percentage of male participants reported a higher 1-year absolute risk of completed suicide. The findings suggest that at a population level, isotretinoin users do not have increased risk of suicide or psychiatric conditions but may instead have a lower risk of suicide attempts at 2 to 4 years following treatment. While these findings are reassuring, clinicians should continue to practice holistic psychodermatologic care and monitor patients for signs of mental distress during isotretinoin treatment.

Prognosis and risk of suicide after cancer diagnosis.

Suicide rates are elevated after cancer diagnosis. Existential distress caused by awareness of one's impending death is well-described in patients with cancer. The authors hypothesized that suicide risk is associated with cancer prognosis, and the impact of prognosis on suicide risk is greatest for populations with higher baseline suicide risk. The authors identified patients (≥16years old) with newly diagnosed cancers from 2000 to 2019 in the Surveillance, Epidemiology, and End Results database, representing 27% of US cancers. Multiple primary-standardized mortality ratios (SMR) were used to estimate the relative risk of suicide within 6months of diagnosis compared to the general US population, adjusted for age, sex, race, and year of follow-up. Suicide rates by 20 most common cancer sites were compared with respective 2-year overall survival rates (i.e., prognosis) using a weighted linear regression model. Among 6,754,704 persons diagnosed with cancer, there were 1610 suicide deaths within 6months of diagnosis, three times higher than the general population (SMR=3.1; 95% confidence interval, 3.0-3.3). Suicide risk by cancer site was closely associated with overall prognosis (9.5%/percent survival deficit, R2 =0.88, p<.0001). The association of prognosis with suicide risk became attenuated over time. For men, the risk of suicide increased by 2.8 suicide deaths per 100,000 person-years (p<.0001) versus 0.3 in women (p<.0001). The risk was also higher for persons ≥60old and for the White (vs. Black) race. Poorer prognosis was closely associated with suicide risk early after cancer diagnosis and had a greater effect on populations with higher baseline risks of suicide. This model highlights the need for enhanced psychiatric surveillance and continued research in this patient population.