How do distal and proximal risk factors combine to predict suicidal ideation and behaviors? A prospective study of the narrative crisis model of suicide

Predicting suicide risk in real-time crisis hotline chats integrating machine learning with psychological factors: Exploring the black box

BACKGROUND

This study addresses the suicide risk predicting challenge by exploring the predictive ability of machine learning (ML) models integrated with theory-driven psychological risk factors in real-time crisis hotline chats. More importantly, we aimed to understand the specific theory-driven factors contributing to the ML prediction of suicide risk.

METHOD

The dataset consisted of 17,654 crisis hotline chat sessions classified dichotomously as suicidal or not. We created a suicide risk factors-based lexicon (SRF), which encompasses language representations of key risk factors derived from the main suicide theories. The ML model (Suicide Risk-Bert; SR-BERT) was trained using natural language processing techniques incorporating the SRF lexicon.

RESULTS

The results showed that SR-BERT outperformed the other models. Logistic regression analysis identified several theory-driven risk factors significantly associated with suicide risk, the prominent ones were hopelessness, history of suicide, self-harm, and thwarted belongingness.

LIMITATIONS

The lexicon is limited in its ability to fully encompass all theoretical concepts related to suicide risk, nor to all the language expressions of each concept. The classification of chats was determined by trained but non-professionals in metal health.

CONCLUSION

This study highlights the potential of how ML models combined with theory-driven knowledge can improve suicide risk prediction. Our study underscores the importance of hopelessness and thwarted belongingness in suicide risk and thus their role in suicide prevention and intervention.

The role of interpersonal stressors and connectedness in acute suicide risk and the suicide crisis syndrome during the COVID-19 pandemic

BACKGROUND

The global COVID-19 pandemic rapidly and drastically impacted everyday life and relationships. Fear of contracting and spreading the virus brought governments and individuals to adopt strict social distancing measures. These changes have had a significant negative impact on mental health, including a suggested increase in suicidal behaviors. The present study examined the role of interpersonal stress and connectedness in suicidal ideation, deliberate self-harm, suicide attempts, and the suicide crisis syndrome during the COVID-19 pandemic.

METHODS

An international sample of 7837 adult participants was recruited across ten participating countries to complete an anonymous online battery of self-report questionnaires. Questionnaires assessed suicide-related outcomes, stressful life events (SLE), and connectedness. Multilevel regression analyses were used to examine the associations between SLE and connectedness on suicide-related outcomes within the past month.

RESULTS

Interpersonal SLEs and low connectedness were associated with an increased likelihood of suicide-related outcomes and increased severity of suicide crisis syndrome. Specifically, higher rates of SLEs and lower levels of connectedness were associated with more suicide-related outcomes.

LIMITATIONS

The use of a cross-sectional design and snowball sampling method may restrict the ability to establish causal relationships and limit the representativeness of the findings.

CONCLUSIONS

Our findings suggest elevated suicide-related outcomes during the COVID-19 pandemic among individuals experiencing multiple interpersonal stressful life events and low connectedness with others. The circumstances of social life during the COVID-19 pandemic highlight the urgency of implementing preventive programs aimed at mitigating potential suicide risks that may arise in the aftermath of public stress situations.

Suicide Crisis Syndrome: A systematic review

BACKGROUND

The objective of this systematic review is to describe the scientific evidence for the Suicide Crisis Syndrome (SCS), a presuicidal cognitive and affective state consisting of five symptomatic dimensions: entrapment, affective disturbance, loss of cognitive control, hyperarousal, and social withdrawal. The aim of this article is to summarize the emerging literature on the SCS and to assess the extent to which a uniform syndrome can be assumed.

METHODS

A systematic literature search was conducted in three different databases (PubMed, PsycInfo, and Google Scholar) using the search terms "Suicide Crisis Inventory," "Suicide Crisis Syndrome," "Narrative Crisis Model of Suicide," and "Suicide Trigger State."

RESULTS

In total, 37 articles from 2010 to 2022 were identified by search criteria. Twenty-one articles published between 2017 and 2022 were included in the systematic review. All but three studies were conducted in the United States and examined clinical samples of adult high-risk psychiatric in- and outpatients. Sample sizes ranged from N = 170 to 4846. The findings confirm the unidimensional structure of the proposed disorder and support the predictive validity for short-term suicidal behavior above and beyond suicidal ideation.

CONCLUSION

Despite the promising predictive validity of the SCS, a precise prediction of future suicidal behavior remains difficult.

Machine learning approach for the development of a crucial tool in suicide prevention: The Suicide Crisis Inventory-2 (SCI-2) Short Form

The Suicide Crisis Syndrome (SCS) describes a suicidal mental state marked by entrapment, affective disturbance, loss of cognitive control, hyperarousal, and social withdrawal that has predictive capacity for near-term suicidal behavior. The Suicide Crisis Inventory-2 (SCI-2), a reliable clinical tool that assesses SCS, lacks a short form for use in clinical settings which we sought to address with statistical analysis. To address this need, a community sample of 10,357 participants responded to an anonymous survey after which predictive performance for suicidal ideation (SI) and SI with preparatory behavior (SI-P) was measured using logistic regression, random forest, and gradient boosting algorithms. Four-fold cross-validation was used to split the dataset in 1,000 iterations. We compared rankings to the SCI-Short Form to inform the short form of the SCI-2. Logistic regression performed best in every analysis. The SI results were used to build the SCI-2-Short Form (SCI-2-SF) utilizing the two top ranking items from each SCS criterion. SHAP analysis of the SCI-2 resulted in meaningful rankings of its items. The SCI-2-SF, derived from these rankings, will be tested for predictive validity and utility in future studies.

Association between childhood maltreatment and suicidal ideation among Chinese patients with chronic schizophrenia: the mediating role of insomnia

BACKGROUND

Childhood maltreatment is a well-established transdiagnostic risk factor for suicidal ideation; however, previous studies on their association in schizophrenia have produced highly varied results. Moreover, the mechanism linking childhood maltreatment and suicide ideation remains unclear in schizophrenia.

AIMS

This cross-sectional study aimed to investigate the association between childhood maltreatment and suicide ideation in people with schizophrenia and tested whether insomnia mediated this relationship.

METHOD

Positive and Negative Syndrome Scale (PANSS), Insomnia Severity Index (ISI), Childhood Trauma Questionnaire - Short Form and Beck Suicidal Ideation Inventory were employed. Logistic regression and mediation analysis were performed.

RESULTS

(a) The prevalence of suicide ideation, insomnia, sexual abuse, emotional neglect, emotional abuse, physical abuse and physical neglect was 10% (n = 61), 18% (n = 111), 11% (n = 68), 25% (n = 153), 6.3% (n = 39), 17% (n = 106) and 39% (n = 239), respectively. In all, 52% (n = 320) reported childhood maltreatment; (b) patients with suicide ideation demonstrated higher insomnia and childhood maltreatment. PANSS depression factor, ISI, lifetime suicidal attempts and emotional abuse were independently associated with suicide ideation; (c) insomnia partially mediated the effects of emotional abuse and emotional neglect on suicide ideation, and insomnia completely mediated the effects of physical neglect and physical abuse on suicide ideation.

CONCLUSION

Our study calls for formal assessments for childhood maltreatment and insomnia in schizophrenia, which might help identify suicide ideation early. In addition, interventions targeting insomnia might help reduce suicide ideation among people with schizophrenia who experience childhood maltreatment.

Unlocking the link between temporomandibular disorders and suicide ideation in pre-orthodontic patients: A moderated mediation model of depression and anxiety

BACKGROUND

Temporomandibular disorders (TMD) are a series of musculoskeletal diseases with high prevalence. A few studies have reported the correlation between TMD and suicide ideation (SI). However, the underlying mechanism of the relationship lacks in-depth exploration.

METHODS

A cross-sectional study was conducted among 954 pre-orthodontic patients. TMD assessment was based on the quintessential five TMD symptoms (5Ts) questionnaire. Anxiety, depression and pain catastrophizing was evaluated by Seven-item Generalized Anxiety Disorder Scale (GAD-7), Nine-item Patient Health Questionnaire (PHQ-9), and Pain Catastrophizing Scale (PCS), respectively. Correlational and moderated mediated analysis was preformed to demonstrate the relationship between TMD and SI.

RESULTS

In pre-orthodontic patients, 31.87 % reported having TMD symptoms and 6.50 % declared SI during the past two weeks. The SI prevalence was 10.53 % in participants with TMD and 4.62 % in those without TMD. Intra-articular TMD, rather than pain-related TMD were especially related with SI. Individuals with TMD had higher risk to SI (rs = 0.112, adjusted OR = 2.213, p < 0.001). The effect of TMD on SI was fully mediated through depression (β = 0.445, 95 % CI = [0.326, 0.563]). Anxiety exerted a negative moderating effect on the depression-SI relation (β = -0.033, 95 % CI = [-0.047, -0.019]).

LIMITATIONS

This study was a single-centered and cross-sectional survey. The data collection relied on self-reporting methods.

CONCLUSIONS

A positive link between TMD and SI was disclosed. The effect of TMD on SI was fully mediated through depression with anxiety as a negative moderator.

Factor structure, reliability, and validity of the revised Suicide Crisis Inventory in major depression: A multicentric Indian study

BACKGROUND

The revised Suicide Crisis Inventory (SCI)-2 is a self-report measure to assess the suicide crisis syndrome (SCS). We aimed to assess the factor structure, reliability, and validity of SCI-2 among adults with major depression.

METHODS

Using a cross-sectional design, between November 2021 and August 2022, the Hindi SCI-2, along with other self-report measures, was administered to Indian adult respondents clinically diagnosed with major depression across 24 centers in India. Confirmatory factor analysis was carried out to test the factor structure of SCI-2. Additionally, convergent, discriminant, and criterion validity were tested using bivariate or biserial correlations, as appropriate.

RESULTS

We obtained responses from 654 participants (Mean age = 36.9 ± 11.9 years, 50.2 % female). The SCI-2 fit both a one-factor (χ2[1769] = 14,150.74, p < .001, CFI = 0.98, RMSEA = 0.10), and five-factor solution (χ2[1759] = 13,130.83, p < .001,CFI = 0.98, RMSEA = 0.10) with the five-factor solution providing a significantly better fit. Internal consistencies of the SCI-2 total and subscale scores ranged from good to excellent. Most subscales significantly converged with each other and with other relevant measures although these associations were weak for thwarted belongingness and goal reengagement subscales. Small to moderate associations were noted in support of discriminant and criterion validity.

LIMITATIONS

We could not assess the predictive validity of SCI-2 for suicidal behaviors.

CONCLUSION

Consistent with prior data, the Hindi SCI-2 fit a five-factor solution and showed good psychometric properties. These findings support the use of SCI-2 to assess SCS among Indian adults with major depression.

The impact of the global COVID-19 pandemic on risk factors for suicide in healthcare workers: A narrative review

BACKGROUND

Suicide is a leading cause of death in the United States. Worldwide, over 700,000 people die by suicide each year. Healthcare workers are more vulnerable to suicide risk factors than the general population. The global COVID-19 pandemic presents additional workplace and health concerns that relate to suicide risk factors in healthcare workers. It is important to recognise suicide risk factors in healthcare workers and to implement strategies to reduce these risk factors.

OBJECTIVES

This study describes the impact of the global COVID-19 pandemic on risk factors for suicide in healthcare workers and identifies evidence-based strategies and resources to reduce suicide risk factors in healthcare workers.

DESIGN

The authors conducted a thematic analysis and narrative review of the literature.

METHODS

Using health science databases, the authors searched the literature, selected and analyzed studies, identified themes, synthesised findings and created a narrative review. The STROBE checklist was used in this study.

RESULTS

Two themes were identified (1) The impact of the COVID-19 pandemic on work-related suicide risk factors in healthcare workers; (2) The impact of the COVID-19 pandemic on mental health-related suicide risk factors in healthcare workers. The pandemic has affected suicide risk factors in healthcare workers. Many studies discussed evidence-based strategies and resources that can be used to reduce suicide risk factors.

CONCLUSION

The global COVID-19 pandemic has negatively impacted suicide risk factors in healthcare workers. It is time for individuals and healthcare delivery systems to implement suicide risk prevention strategies to protect healthcare workers now and in the future.

RELEVANCE TO CLINICAL PRACTICE

This review increases awareness of the pandemic's impact on healthcare workers' risk factors for suicide and identifies evidence-based suicide risk prevention strategies and resources for healthcare workers.

PATIENT OR PUBLIC CONTRIBUTION

Library services supported this research by generating search strategies and providing resources and tools.

Epidemiological profile, temporal analysis, and future projections of suicide cases in rural cities in the extreme south of Brazil

The present study aimed to verify the time series (2000-2017) of death rates by suicide and its associated factors in 4 municipalities in the extreme south of Brazil. Data were obtained through the analysis of medical reports and police report bulletins at the Instituto Médico Legal, in the city of Rio Grande. The suicide rate in the Rio Grande region varied from 4 to 11 suicides per 100,000 inhabitants and it is estimated that by 2030 this rate could reach 16.5 suicides per 100,000 inhabitants. The rural cities of Santa Vitória do Palmar and Chuí present even higher suicide averages when compared to Rio Grande, the most populous city of the four. The death rate from suicide increased gradually in the period analyzed, with the prevalence rising among the youngest and the elderly population. A more comprehensive understanding of the influences of environmental issues on suicidal decisions constitutes an important action that needs to be taken, both because of regional vulnerabilities and the target population identified. Evidence indicates that knowledge of factors affecting individuals residing in this Brazilian region where increased suicide rates are recorded needs to be recognized as a priority.

Moderation effects of health behaviors on stress and suicidal ideation in adolescents: a cross-sectional survey during COVID-19

This cross-sectional online survey study investigated whether certain health behaviors moderated the relationship between perceived stress and suicidal ideation in Austrian adolescents during the COVID-19 pandemic. A total of 1505 14-20-year-old (median age = 16) high school students (77.9% female) filled out an online survey from September to November 2021. Perceived stress was measured with the PSS10, suicidal ideation with item 9 of the PHQ-9. The following health behaviors were assessed: Physical activity (days/week), phone use (hours/day), problematic drinking behavior (CAGE). All three health behaviors significantly moderated the relationship between perceived stress and suicidal ideation (all p < .05), but effects were small. The moderation analyses revealed that higher physical activity and less time spent on the phone were associated with less suicidal ideation at higher stress levels. Showing signs of problematic drinking behavior was associated with higher suicidal ideation at higher stress levels. In conclusion, these results suggest that some health behaviors may be able to act as a buffer between perceived stress and suicidal ideation. However, more research is needed to confirm these potentially buffering effects.

Bridge symptoms between parenting styles and proximal psychological risk factors associated with adolescent suicidal thoughts: a network analysis

BACKGROUND

Parenting styles and the associated proximal psychological factors are suggested to increase suicidal risks in adolescents. However, how the two factors interact and confer risks on the emergence of adolescent suicidal thoughts remains unclear. Herein, we used a network approach to investigate their interrelationship and explore whether the network properties predict adolescent suicidal thoughts.

METHODS

Self-report questionnaires were completed by 1171 students aged 12-16. Network analyses were performed by Gaussian graphical models estimating the adolescent psychosocial network structure of parenting styles and psychological variables including depression, anxiety, affective lability, rumination, and resilience. Furthermore, we re-examined the network by adding a variable measuring active suicidal thoughts. Moreover, we conducted linear regressions to examine the predictive utility of bridge symptoms for adolescent suicidal thoughts.

RESULTS

Resilience, Afraid, Rumination, Concentration, and affective lability (Anger) had the highest bridge strengths in the adolescent psychosocial network. Among the identified bridge symptoms, Resilience was negatively correlated with active suicidal thoughts (regularized edge weights = -0.181, bootstrapped 95% CIs: [-0.043, -0.155]), whereas affective lability (from Anxiety to Depression, Anger), Rumination, and Afraid were positively correlated with active suicidal thoughts, with edge weights (bootstrapped 95% CIs) ranging from 0.057 (0.001, 0.112) to 0.081(0.026, 0.136). Regression analysis showed that bridge strength was significantly correlated with active suicidal thoughts (R2 = 0.432, P = 0.001).

CONCLUSION

Negative parenting styles may drive and maintain suicidal thoughts by modifying the key proximal psychological variables. Our findings highlight the important role of bridge symptoms, which may serve as vital targets for triggering adolescent suicide.

Does peripheral vestibular disorder increase the risk of attempted suicide: A retrospective cohort study

BACKGROUND

This study aimed to investigate the risk of attempted suicide in the population of patients diagnosed with peripheral vestibular disorders (PVD).

METHODS

We conducted a retrospective cohort study. We extracted data on patients diagnosed with PVD (72,569 study patients) and a 3:1 ratio of propensity-score matched comparison patients without PVD (217,707 patients) from Taiwan's Longitudinal Health Insurance Database 2010. The claims records of sampled patients were tracked for a one-year period from their index date to identify claims showing a diagnosis of suicide attempt. Cox proportional hazards regression analyses were performed to calculate the one-year hazard ratio (HR) of suicide attempt following the PVD diagnosis among PVD patients relative to comparison patients.

RESULTS

Of total 290,276 sampled patients, the rate of attempted suicide was 0.158 per 100 person-years, being 0.460 and 0.057, respectively, among PVD patients and comparison patients. Cox proportional hazard analysis showed that PVD patients had a high relative hazard of suicide attempt (adjusted HR = 7.622, 95 % CI = 6.196-9.376) during one-year follow-up relative to comparison patients. We also found that subcategories of PVD, showed similar adjusted hazard ratios as all PVDs: Meniere's disease (HR = 7.608, 95 % CI = 4.350-13.305), benign paroxysmal positional vertigo (HR = 8.201, 95 % CI = 4.716-14.260), and vestibular neuritis (HR = 9.399, 95 % CI = 5.036-17.544).

LIMITATIONS

The incidence of suicide attempts could be underestimated in both the study group and comparison group, if the suicide attempt did not cause a medical emergency and the patient did not seek medical assistance.

CONCLUSIONS

We found a high magnitude of association between PVD and subsequent suicide attempt.

Impulsivity traits and suicide related outcomes: A systematic review and meta-analysis using the UPPS model

BACKGROUND

The affective, cognitive, and behavioral aspects of impulsivity involved in suicide-related outcomes can be investigated through the UPPS model, which conceptualizes these facets in multidimensional terms related to negative and positive urgency, lack of premeditation and perseverance, and sensation seeking. This systematic review and meta-analysis provided a comprehensive understanding of the role of all facets of impulsivity in the development of suicidal ideation and behaviors.

METHODS

We conducted a systematic search on six databases (PsycINFO, PsycARTICLES, PubMed, MEDLINE, Scopus, and Web of Science) until May 5,2023. Overall, 49 studies met the criteria for systematic review, of which 37 were included in a meta-analysis of data from 17.898 individuals. Additional moderation analyses included age, gender, sample status, country of study conduct, assessment instruments, type of suicide-related outcome, study quality, and research design.

RESULTS

We found significant relationships between aspects of impulsivity and suicide-related outcomes. Specially, affective facets related to impulsivity showed a stronger association with suicidal ideations and attempts than cognitive and behavioral dimensions, recommending the main involvement of emotional aspects-positive and negative-in suicide-related dimensions.

LIMITATIONS

The limited number of studies may have negatively impacted the power of moderation analyses. In addition, for most dimensions of impulsivity, the limited number of longitudinal studies did not allow to test the moderating role of research design.

CONCLUSIONS

This study supports the role of impulsivity in suicidal ideation and behavior, identifying the affective component of impulsivity as the most involved, providing a significant contribution from a clinical and diagnostic point of view.

Factor Structure and Validity of the Suicidal Narrative Inventory Among Indian Adults

Background: The suicidal narrative is a presuicidal state comprising several risk factors for suicide and is assessed using the Suicidal Narrative Inventory (SNI). Aims To assess the internal structure, reliability, and validity of SNI among Indian adults. Methods Between August 2020 and January 2021, the SNI, together with other self-report measures, was administered to adult respondents using an online anonymized questionnaire. Confirmatory factor analysis (CFA) was carried out to test the factor structure of the SNI. Results Usable responses were obtained from 302 participants (Mage = 43.5 ± 17.9 years, 53.6% female). The results of an eight-factor CFA of the SNI resulted in good model fit (χ2 [637] = 969.73, p < .001, comparative fit index = 1.00, root mean square error of approximation = .04). Internal consistencies of SNI subscale scores ranged from acceptable to excellent (range α = .67-.92). Most subscales significantly converged with other measures although these associations were minimal for the goal disengagement and reengagement subscales. Limitations The use of an online survey method to collect data introduced sampling bias. Conclusion The eight-factor CFA of the SNI, among Indian adults, was consistent with prior data. Our findings provide preliminary support for the use of SNI to assess the suicidal narrative construct among Indian adults.

Stressful Life Events and Near-term Suicidal Risk in a Clinical Population

The present study examined 22 specific stressful life events (SLEs) in relation to recent and prospective suicidal thoughts and behaviors (STBs). The effect of assessment method (self-report vs. chart-based ratings) and inpatient/outpatient status was also investigated. Past 3-month STBs and SLEs were assessed for 1,058 psychiatric patients; 696 completed one-month follow-up assessments. SLEs were common, with 684 participants (64.7%) reporting at least one. Total number of SLEs correlated with recent and prospective STB. A higher incidence of SLE's was found with self-report vs. chart-based measures (on 20 SLEs) and inpatients vs. outpatients (on 7 SLEs). SLEs of interpersonal rejection and loss, homelessness and academic failure offered elevated risk. In sum, SLEs are common and associated with STBs in psychiatric patients. SLEs of interpersonal rejection and loss, homelessness and academic failure may merit increased clinical attention.

Cross-national presence and sociodemographic correlates of the suicide crisis syndrome

BACKGROUND

The Suicide Crisis Syndrome (SCS) has been proposed as an acute, pre-suicidal mental state that precedes imminent suicidal behavior; however, its cross-national applicability and sociodemographic correlates have not yet been determined. The present study assessed the presence and severity of the SCS in ten countries and examined several potential sociodemographic correlates (i.e., age, gender, marital status, race/ethnicity) of the SCS.

METHODS

5528 community-based adults across 10 participating countries provided information on their SCS symptoms and sociodemographic characteristics in an anonymous online survey obtained via convenience sampling during the first year of the COVID-19 pandemic.

RESULTS

The SCS occurred cross-nationally, with rates ranging from 3.6% (Israel) to 16.2% (Poland). Those in the United States, South Korea, Poland, and Turkey had the highest severity of symptoms. Participants who were older, identified as cisgender men, and married tended to have lower rates of the SCS than their respective counterparts. There were minimal differences in the SCS by race/ethnicity.

LIMITATIONS

These data were both cross-sectional and collected via convenience sampling, limiting generalizability of findings and information about the SCS's predictive utility.

CONCLUSIONS

These findings support the cross-national presence of the SCS during the COVID-19 pandemic. Sociodemographic correlates aligned with those of suicidal behavior more generally, providing additional evidence for the concurrent/predictive validity of the SCS.

Two sides of the same coin? Empirical examination of two proposed characterizations of acute suicidal crises: Suicide crisis syndrome and acute suicidal affective disturbance

Two proposed suicide-specific diagnoses, with accumulating research support, characterize the phenomenology of acute suicidal crises: Suicide Crisis Syndrome (SCS) and Acute Suicidal Affective Disturbance (ASAD). Despite conceptual overlap and some similar criteria, the two syndromes have never been compared empirically. The present study addressed this gap by examining SCS and ASAD utilizing a network analysis approach. A sample of 1568 community-based adults (87.6% cisgender women, 90.7% White, M_age = 25.60 years, SD = 6.59) in the United States completed an online battery of self-report measures. SCS and ASAD were first examined in individual network models, followed by a combined network to determine changes in network structure, as well as identify bridge symptoms that connected SCS and ASAD. The proposed criteria of SCS and ASAD formed sparse network structures that were largely unaffected by the influence of the other syndrome in a combined network. Social disconnection/withdrawal and manifestations of overarousal-particularly agitation, insomnia, and irritability-emerged as bridge symptoms that may connect SCS and ASAD. Our findings indicate the network structures of SCS and ASAD exhibit patterns of independence, alongside interdependence between overlapping symptom domains (i.e., social withdrawal, overarousal). Future work should examine SCS and ASAD prospectively to better understand their temporal dynamics and predictive utility in relation to imminent suicide risk.

Association of sociodemographic, proximal, and distal clinical factors with current suicidal ideation: Findings from a nonclinical sample of young adults

BACKGROUND

Accumulating evidence indicates that a variety of distal and proximal factors might impact a risk of suicide. However, the association between both groups of factors remains unknown. Therefore, in the present study, we aimed to investigate the interplay between distal and proximal correlates of the current suicidal ideation.

METHODS

A total of 3,000 individuals (aged 18-35 years, 41.7% males), who had reported a negative history of psychiatric treatment, were enrolled through an online computer-assisted web interview. Self-reports were administered to measure: (a) distal factors: a history of childhood trauma (CT), reading disabilities (RDs), symptoms of attention-deficit/hyperactivity disorder (ADHD), lifetime history of non-suicidal self-injury (NSSI), lifetime problematic substance use as well as family history of schizophrenia and mood disorders; (b) proximal factors: depressive symptoms, psychotic-like experiences (PLEs), and insomnia; and (c) sociodemographic characteristics.

RESULTS

Suicidal ideation was directly associated with unemployment, being single, higher level of RD, lifetime history of NSSI as well as higher severity of PLEs, depression, and insomnia. The association of distal factors with suicidal ideation was fully (a history of CT and symptoms of ADHD) or partially (a history of NSSI and RD) mediated by proximal factors (PLEs, depression, and insomnia).

CONCLUSIONS

Main findings from this study posit the role of distal factors related to neurodevelopmental disorders, CT and NSSI in shaping suicide risk. Their effects might be partially or fully mediated by depression, PLEs, and insomnia.

Understanding Suicide over the Life Course Using Data Science Tools within a Triangulation Framework

Suicide and suicidal behaviors are important global health concerns. Preventing suicide requires a nuanced understanding of the nature of suicide risk, both acutely during periods of crisis and broader variation over the lifespan. However, current knowledge of the sources of variation in suicide risk is limited due to methodological and conceptual challenges. New methodological approaches are needed to close the gap between research and clinical practice. This review describes the life course framework as a conceptual model for organizing the scientific study of suicide risk across in four major domains: social relationships, health, housing, and employment. In addition, this review discusses the utility of data science tools as a means of identifying novel, modifiable risk factors for suicide, and triangulation as an overarching approach to ensuring rigor in suicide research as means of addressing existing knowledge gaps and strengthening future research.

Identifying Youth at Risk for Suicidal Thoughts and Behaviors Using the "p" factor in Primary Care: An Exploratory Study

Suicide is a major, preventable public health problem. The general factor of psychopathology ("p" factor) might help improve detection and prediction of individuals at risk for suicide. This cross-sectional proof-of-concept study tests whether the p-factor score is associated with suicidal thoughts and behaviors (STB) better than a depression scale alone. Youth (N = 841; mean age 18.02, SD = 3.36) in primary care were universally screened using the Behavioral Health Screen (BHS). Factor analysis and ROC results showed the BHS assesses the p-factor, and the p-factor score demonstrates higher classification accuracy of several types of STB than a depression scale. The p-factor could help clinicians in the identification of youths with STB.

Factor structure and validity of the Revised Suicide Crisis Inventory (SCI-2) among Indian adults

BACKGROUND

There is a dearth of cross-cultural data on the psychometric properties of the revised Suicide Crisis Inventory (SCI)- 2. Our objective was to examine the factor structure, reliability, and validity of the SCI-2 among Indian adults.

METHODS

Using an online survey method, between August 20, 2020 and January 31, 2021, an anonymous questionnaire containing general sociodemographic information and self-report measures was circulated over email and social media. Confirmatory factor analyses (CFA) of the SCI-2 was carried out. We also examined the internal consistency of the SCI-2 and tested its convergent validity against the Suicide Narrative Inventory (SNI) and the Perceived Stress Scale (PSS-10).

RESULTS

A total of 302 participants (Mean age = 43.5 ± 17.9 years, 53.6% female) were obtained. Results of the one-factor CFA indicated good model fit (χ2[1769] = 5368.75, p < 0.001, Comparative Fit Index [CFI] =0.99, Root mean square error of approximation [RMSEA] =0.08). Similarly, the five-factor CFA also exhibited strong model fit (χ2[1759] = 4215.54, p < 0.001, CFI = 1.00, RMSEA =0.07). Comparison of these models indicated that the five-factor model demonstrated superior model fit (Δχ2[10] = 278.88, p < 0.001). The SCI-2 total and subscale scores showed excellent internal consistency and good convergent validity against most domains of the SNI and PSS-10.

CONCLUSION

Among Indian adults, the SCI-2 demonstrated good psychometric properties with the proposed five-factor solution providing the best fit. These findings provide support for the SCI construct and its assessment with the SCI-2 in an Asian setting.

Differential disclosure of suicidal intent to clinicians versus researchers: Associations with concurrent suicide crisis syndrome and prospective suicidal ideation and attempts

Several patient and setting characteristics have been found to predict disclosure of suicidality to clinicians versus researchers. Less understood, however, is whether differential disclosure of suicidality predicts concurrent indirect indicators of suicide risk and future suicide-related outcomes. The present study examined differential disclosure of suicidal intent in clinical versus research settings as a predictor of (1) concurrent symptoms of the Suicide Crisis Syndrome (SCS); and (2) suicidal ideation and attempts within one month in patients (n = 1039) and their clinicians (n = 144), who completed a battery of self-report and interview measures at baseline. Patients who reported suicidal intent to anyone had higher concurrent SCS symptoms than those who denied suicidal intent, with no differences between those who reported intent to clinicians versus researchers only. Severity of suicidal ideation and rates of suicide attempts at one-month follow-up were higher among those who disclosed suicidal intent to a research assistant than among those who did not-regardless of whether suicidal intent was disclosed to their clinician. Overall, an improved understanding of the factors contributing to differential disclosure will improve both scientific inquiry and patient safety.

The Narrative-Crisis Model of suicide and its prediction of near-term suicide risk

Despite decades of research, much remains unknown about the transition from chronic to imminent suicidal risk. In the context of COVID-19, this question is even more urgent. The present study tests a novel, stepwise model of this transition, termed the Narrative-Crisis Model. This model proposes that, in people with chronic risk factors, stressful life events can trigger a specific progression of cognitive-affective responses (the suicidal narrative and the suicide crisis syndrome), resulting in increased near-term risk of suicidal thoughts and behavior (STB). Identification of each step in this progression provides opportunities for more precise interventions. Concurrent validity was tested with 732 psychiatric patients and predictive validity with 524 participants, assessed one to two months later. Chronic risk factors were measured with the Childhood Trauma Questionnaire, Relationship Styles Questionnaire, and UPPS-P Impulsive Behavior Scale; acute risk factors with the Stressful Life Events Questionnaire, Suicide Narrative Inventory, and Suicide Crisis Inventory. The Columbia Suicide Severity Rating Scale was administered at the initial research assessment and follow-up. Indirect effects were significant for the full model and most pathways, in both concurrent and prospective analyses. In sum, this study provides empirical support for a novel, stepwise model of the progression from chronic to near-term suicidal risk.

Prenatal origins of suicide mortality: A prospective cohort study in the United States

Most suicide research focuses on acute precipitants and is conducted in high-risk populations. Yet, vulnerability to suicide is likely established years prior to its occurrence. In this study, we aimed to investigate the risk of suicide mortality conferred by prenatal sociodemographic and pregnancy-related factors. Offspring of participants (N = 49,853) of the Collaborative Perinatal Project, a U.S. population-based cohort of pregnancies enrolled between 1959 and 1966, were linked to the U.S. National Death Index to determine their vital status by the end 2016. We examined associations between sociodemographic factors during pregnancy, pregnancy complications, labor and delivery complications, and neonatal complications with suicide death coded according to ICD-9/10 criteria. By the end of 2016, 3,555 participants had died. Of these, 288 (214 males, 74 females) died by suicide (incidence rate = 15.6 per 100,000 person-years, 95% Confidence Interval [CI] = 13.9-17.5). In adjusted models, male sex (Hazard Ratio [HR] = 2.98, CI: 2.26-3.93), White race (HR = 2.14, CI = 1.63-2.83), low parental education (HR = 2.23, CI = 1.38-3.62), manual parental occupation (HR = 1.38, CI = 1.05-1.82), being a younger sibling (HR = 1.52, CI = 1.10-2.11), higher rates of pregnancy complications (HR = 2.36, CI = 1.08-5.16), and smoking during pregnancy (HR = 1,28, CI = 0.99-1.66) were independently associated with suicide risk, whereas birth and neonatal complications were not. Consistent with the developmental origins of psychiatric disorders, vulnerability to suicide mortality is established early in development. Both sociodemographic and pregnancy factors play a role in this risk, which underscores the importance of considering life course approaches to suicide prevention, possibly including provision of high-quality prenatal care, and alleviating the socioeconomic burdens of mothers and families.

The revised suicide crisis inventory (SCI-2): Validation and assessment of prospective suicidal outcomes at one month follow-up

BACKGROUND AND AIM

The Suicide Crisis Syndrome (SCS) is an evidence-based pre-suicidal cognitive and affective state predictive of short-term suicide risk. The most recent SCS formulation, proposed as a suicide-specific DSM diagnosis, features a feeling of Entrapment accompanied by four additional symptom clusters: Affective Disturbance; Loss of Cognitive Control; Hyperarousal; and Social Withdrawal. The aim of the present study was to revise the Suicide Crisis Inventory (SCI; Barzilay et al., 2020), a self-report measure assessing the presence of the SCS,in accordance with the current SCS formulation, as well as to assess the psychometric properties and clinical utility of its revised version, the Suicide Crisis Inventory-2 (SCI-2).

METHODS

The SCI-2, a 61-item self-report questionnaire, was administered to 421 psychiatric inpatients and outpatients at baseline. Prospective suicidal outcomes including suicidal ideation, preparatory acts, and suicidal attempts were assessed after one month. Internal structure and consistency were assessed with confirmatory factor analysis, convergent, discriminant, and current criterion validity. Receiver-operating characteristic (ROC) curves with Area under the Curve (AUC) were used to examine the predictive validity of the SCI-2 to prospective outcomes. Exploratory analyses assessed the predictive validity of the five SCI-2 dimensions.

RESULTS

The SCI-2 demonstrated excellent internal consistency (Cronbach's α = 0.971), good convergent, discriminant, and current criterion validity. The SCI-2 significantly predicted all three outcomes, and was the only significant predictor of suicidal attempts with AUC = 0.883.

DISCUSSION

The results of this study indicate that the SCI-2 is a valid and reliable tool to assess the presence and intensity of the Suicide Crisis Syndrome and to predict short-term prospective suicidal behaviors and attempts among psychiatric outpatients and inpatients regardless of patients' readiness to disclose suicidal ideation.

Choosing Death Over Survival: A Need to Identify Evolutionary Mechanisms Underlying Human Suicide

The act of killing self contradicts the central purpose of human evolution, that is, survival and propagation of one’s genetic material. Yet, it continues to be one of the leading causes of human death. A handful of theories in the realm of evolutionary psychology have attempted to explain human suicide. The current article analyses the major components of certain prominent viewpoints, namely, Inclusive fitness, Bargaining model, Pain-Brain model, Psychological aposematism, and few other perspectives. The article argues that relatively more weightage has been given to understanding ultimate (the “why”) rather than proximate (the “how”) functionality of suicidal acts. Evolutionary theorists have consistently pointed out that to comprehensively understand a trait or behavior, one needs to delineate not only how it supports survival but also the evolution of the mechanisms underlying the trait or behavior. Existing theories on suicide have primarily focused on its fitness benefits on surviving kin instead of providing evolutionary explanations of the more complex mechanisms leading up to such self-destructive motivations. Thus, the current paper attempts to highlight this gap in theorizing while suggesting probable proximate explanations of suicide which stresses the need to diffuse attention paid to fitness consequences of the act alone. We speculate that such explorations are needed in order to build a robust and comprehensive evolutionary theory of human suicide.

The association between the suicide crisis syndrome and suicidal behaviors: The moderating role of personality traits

BACKGROUND

Personality traits have been associated with long-term suicide risk but their relationship with short-term risk is still unknown. Therefore, to address this gap, we explored the moderating effect of personality traits on the relationship between the Suicide Crisis Syndrome (SCS) and short-term suicidal behaviors (SB).

SAMPLING AND METHODS

Adult participants (N = 459) were administered the Suicide Crisis Inventory (SCI), a validated self-report questionnaire designed to measure the intensity of the Suicidal Crisis Syndrome, the Big Five Inventory for personality traits, and the Columbia Suicide Severity Rating Scale for SB at intake and at a 1-month follow-up. The PROCESS macro in SPSS was used to test the moderation model. Covariates hypothesized to influence the results were added: age, gender, ethnicity, years of education, and depressive symptomatology on the Beck Depression Inventory. This study was a secondary analysis drawn from a larger study on the SCS.

RESULTS

SCI total score had a significant positive relationship with SB at the 1-month follow-up for patients with lower levels of extraversion, agreeableness, conscientiousness, and openness, respectively. Hence, these four traits were protective against SB. There was an association between SCI and SB for patients with high levels of neuroticism at the 1-month follow-up.

CONCLUSIONS

High levels of neuroticism served as a risk factor, whereas high levels of the other Big Five traits were protective factors against short-term SB in the context of elevated SCS symptoms. Thus, personality traits play a role in moderating the relationship between the SCS and imminent SB.

The role of suicide ideation in assessing near-term suicide risk: A machine learning approach

BACKGROUND

The majority of suicide attempters do not disclose suicide ideation (SI) prior to making an attempt. When reported, SI is nevertheless associated with increased risk of suicide. This paper implemented machine learning (ML) approaches to assess the degree to which current and lifetime SI affect the predictive validity of the Suicide Crisis Syndrome (SCS), an acute condition indicative of imminent risk, for near-term suicidal behaviors (SB ).

METHODS

In a sample of 591 high-risk inpatient participants, SCS and SI were respectively assessed using the Suicide Crisis Inventory (SCI) and the Columbia Suicide Severity Rating Scale (C-SSRS). Two ML predictive algorithms, Random Forest and XGBoost, were implemented and framed using optimism adjusted bootstrapping. Metrics collected included AUPRC, AUROC, classification accuracy, balanced accuracy, precision, recall, and brier score. AUROC metrics were compared by computing a z-score.

RESULTS

The combination of current SI and SCI showed slightly higher predictive validity for near-term SB as evidenced by AUROC metrics than the SCI alone, but the difference was not significant (p<0.05). Current SI scored the highest amongst a chi square distribution in regards to predictors of near-term SB.

CONCLUSION

The addition of SI to the SCS does not materially improve the model's predictive validity for near-term SB, suggesting that patient self-reported SI should not be a requirement for the diagnosis of SCS.

Associations between goal orientation and suicidal thoughts and behaviors at one-month follow-up: Indirect effects through ruminative flooding

Previous research has identified both goal orientation and ruminative flooding as potential risk factors for suicidal thoughts and behaviors, as well as positive associations between goal orientation and rumination. The present study examined whether the association between goal orientation and suicidal thoughts and behaviors, assessed one month later, was accounted for by ruminative flooding. A sample of 924 psychiatric outpatients (M_age = 39.09 years, SD = 14.82, range = 18 to 84; 61.7% female; 37.0% White) completed self-report and interview measures at baseline and provided information about suicide-related outcomes at one-month follow-up. Goal orientation was positively associated with ruminative flooding, and both goal orientation and ruminative flooding were associated with suicidal thoughts and behaviors at one-month follow-up. Controlling for lifetime suicidal thoughts and behaviors, as well as patient age and sexual orientation, ruminative flooding accounted for the relationship between goal orientation and suicidal thoughts and behaviors at one-month follow-up. These findings were especially relevant for individuals with a history of multiple suicide attempts. Overall, this study provided evidence that difficulties with goal orientation may relate to suicidal thoughts and behaviors through intense ruminations perceived as a loss of cognitive control. Interventions that address ruminative thinking and cognitive flexibility may, in turn, assist in reducing emotion dysregulation and managing suicidality among those who struggle with goal orientation.

Behind therapists' emotional responses to suicidal patients: A study of the narrative crisis model of suicide and clinicians' emotions

OBJECTIVE

Clinicians' negative emotional responses to suicidal patients are predictive of near-term suicidality. This study aimed to explore the underlying pathway of this association by investigating the potential relationship between clinicians' emotional responses and the Narrative Crisis Model of suicide, which comprises long-term risk factors (LTRF) of suicidal thoughts and behaviors, Suicidal Narrative, and the Suicide Crisis Syndrome (SCS), a presuicidal affective state.

METHOD

One thousand and One patient participants and 169 clinician participants were recruited. Patients' Suicidal Narrative, SCS, and LTRF were assessed at intake using the Suicidal Narrative Inventory (SNI), the Suicide Crisis Inventory, and a composite score of three separate scales, respectively. Clinicians' emotional responses were measured immediately after patient intake using the Therapist Response Questionnaire-Suicide Form (TRQ-SF).

RESULTS

Multilevel regression analyses, which controlled for clinician differences, found that only patients' SNI total score and perceived burdensomeness subscale score were significantly associated with clinicians' TRQ-SF total score. Furthermore, a higher SNI total score was significantly related to higher distress and lower affiliation scores among clinicians.

CONCLUSIONS

Clinicians appear to respond emotionally to patients' Suicidal Narrative, and thus, future investigation of Suicidal Narrative and its potential to improve imminent suicide risk assessment is warranted.