PTSD symptoms and suicide ideation: Testing the conditional indirect effects of thwarted interpersonal needs and using substances to cope

Posttraumatic stress disorder (PTSD) symptoms and substance use have been associated with increased suicide ideation, but have rarely been examined within a larger theoretical context of suicide risk. The interpersonal theory of suicide posits that feeling disconnected from others (i.e., thwarted belongingness) and feeling like a burden on others (i.e., perceived burdensomeness) are associated with increased suicide ideation. We hypothesized that perceived burdensomeness and thwarted belongingness would mediate the relation between PTSD symptoms and suicide ideation, and that using substances to cope would moderate these relations. Participants were 254 college students reporting exposure to potentially traumatic experiences. Findings from a moderated mediation analysis indicated that perceived burdensomeness, but not thwarted belongingness, mediated the relation between PTSD symptoms and suicide ideation, and using substances to cope moderated this relation. Therapeutic interventions aimed at reducing suicide ideation might benefit from decreasing perceived burdensomeness and the use of substances to cope.     

Asian American college students' suicide ideation: a mixed-methods study

The purpose of this mixed-methods study was to explore the phenomenon of suicide ideation among 293 Asian American college students. Guided by T. Joiner's (2005) interpersonal-psychological theory of suicidal behavior, the authors examined the relationships among perceived burdensomeness, thwarted belongingness, self-construals, and suicide ideation. Compared with thwarted belongingness, perceived burdensomeness was a more robust predictor of suicide ideation. However, thwarted belongingness moderated the positive association between perceived burdensomeness and suicide ideation. Furthermore, interdependent self-construal and independent self-construal both weakened the link between perceived burdensomeness and suicide ideation and between thwarted belongingness and suicide ideation. The authors also conducted a qualitative analysis of participants' open-ended responses about their perceptions of why Asian American college students might consider suicide. The authors identified a core phenomenon of unfulfilled expectations as well as 2 broad themes related to this core phenomenon: unfulfilled intrapersonal expectations and unfulfilled interpersonal expectations, comprising the subthemes of (a) family, (b) relationship, (c) cultural differences, and (d) racism. These findings are discussed in terms of implications for suicide-related clinical interventions and primary prevention efforts among Asian American college students.     

Race,Offense Type,and Suicide Ideation: Tests of the Interpersonal‐Psychological Theory in Juvenile Offenders

This study evaluated the synergy hypothesis of the Interpersonal‐Psychological Theory of Suicide (IPTS ), which argues thwarted belongingness and perceived burdensomeness are positively interactive in their association with suicide ideation, in a group of juvenile offenders. It also examined whether this prediction is differentially applicable across race/ethnicity or offense type. Participants included 590 adjudicated and confined male juveniles. Regression was used to test the association between suicide ideation and thwarted belongingness, perceived burdensomeness, and their interaction term. Subsequent analyses included tests of group interactions related to race/ethnicity and offense type. No interaction between thwarted belongingness and perceived burdensomeness was observed, despite adequate power. No significant group interactions were observed for race/ethnicity or offense type. However, results did show significant linear relationships between thwarted belongingness, perceived burdensomeness, and ideation, highlighting their potential utility as intervention targets in this at‐risk population. Thus, although the current results are the first to show the basic IPTS risk factors generalize across race/ethnicity and offense type, they also failed to support that those factors were interactive, a primary IPTS claim. The absence of an interaction between thwarted belongingness and perceived burdensomeness suggests their role in suicide ideation for juvenile offenders may be more parsimonious than the IPTS proposes.     

Examining Proximal Risk Factors for Suicide in a Sample of Mexican Adults in Rehabilitation Centers

The cross‐cultural generalizability of the interpersonal theory of suicide was examined in this study. One hundred ninety‐nine adults in an inpatient setting in Mexico completed the Personal Resources Questionnaire, Beck Hopelessness Scale, Interpersonal Needs Questionnaire, Acquired Capability for Suicide Scale, and Suicide Behaviors Questionnaire‐Revised. Analyses revealed the interaction between perceived burdensomeness and thwarted belongingness did not predict suicide ideation. The interactions between perceived burdensomeness and thwarted belongingness and between perceived burdensomeness and acquired capacity significantly predicted suicidal behaviors, whereas the hypothesized three‐way interaction did not. These findings highlight the importance of perceived burdensomeness in the development of suicidal behaviors among Mexican‐origin adults.     

Comparisons of the Interpersonal–Psychological Theory of Suicide Constructs Among Individuals Without Suicidality,Ideators, Planners,and Attempters

The Interpersonal–Psychological Theory of Suicide (IPTS) proposes that combinations of thwarted belongingness, perceived burdensomeness, and acquired capability lead to suicide ideation, planning, and attempting. We compared individuals with and without suicidality on thwarted belongingness and perceived burdensomeness, and compared a combined group of planners and attempters to ideators on fearlessness about death (one component of acquired capability). Individuals with suicidality had higher thwarted belongingness and perceived burdensomeness than individuals without suicidality. Planners and attempters did not have higher fearlessness about death than ideators. These findings partially support IPTS hypotheses. Assessing thwarted belongingness and perceived burdensomeness may improve suicide risk determination.     

The Role of Hope and Optimism in Suicide Risk for American Indians/Alaska Natives

There are some American Indian/Alaska Native communities that exhibit high rates of suicide. The interpersonal theory of suicide (Joiner, 2005) posits that lethal suicidal behavior is likely preceded by the simultaneous presence of thwarted belongingness, perceived burdensomeness, and acquired capability. Past research has shown that hope and optimism are negatively related to suicidal ideation, some of the constructs in the interpersonal theory of suicide, and suicide risk for the general population. This is the first study to investigate hope and optimism in relation to suicidal ideation, thwarted belongingness, perceived burdensomeness, and acquired capability for American Indians/Alaska Natives. Results showed that hope and optimism negatively predicted thwarted belongingness, perceived burdensomeness, and suicidal ideation. However, these results were not found for acquired capability. Overall, this study suggests that higher levels of hope and optimism are associated with lower levels of suicidal ideation, thwarted belongingness, and perceived burdensomeness in this American Indian/Alaska Native sample.     

The moderating effect of humor style on the relationship between interpersonal predictors of suicide and suicidal ideation

This study investigated how positive and negative humor styles relate to suicidal ideation, thwarted belongingness, and perceived burdensomeness. Analyses indicated that affiliative and self-defeating humor style moderated the relationships between thwarted belongingness and suicidal ideation as well as perceived burdensomeness and suicidal ideation when controlling for depression. The clinical importance of assessing and tracking humor styles as potential coping mechanisms against suicidal thinking is discussed.     

Posttraumatic Stress Disorder Symptom Clusters and the Interpersonal Theory of Suicide in a Large Military Sample

Prior studies examining posttraumatic stress disorder (PTSD) symptom clusters and the components of the interpersonal theory of suicide (ITS) have yielded mixed results, likely stemming in part from the use of divergent samples and measurement techniques. This study aimed to expand on these findings by utilizing a large military sample, gold standard ITS measures, and multiple PTSD factor structures. Utilizing a sample of 935 military personnel, hierarchical multiple regression analyses were used to test the association between PTSD symptom clusters and the ITS variables. Additionally, we tested for indirect effects of PTSD symptom clusters on suicidal ideation through thwarted belongingness, conditional on levels of perceived burdensomeness. Results indicated that numbing symptoms are positively associated with both perceived burdensomeness and thwarted belongingness and hyperarousal symptoms (dysphoric arousal in the 5‐factor model) are positively associated with thwarted belongingness. Results also indicated that hyperarousal symptoms (anxious arousal in the 5‐factor model) were positively associated with fearlessness about death. The positive association between PTSD symptom clusters and suicidal ideation was inconsistent and modest, with mixed support for the ITS model. Overall, these results provide further clarity regarding the association between specific PTSD symptom clusters and suicide risk factors.     

Shame,Guilt, and Suicide Ideation among Bondage and Discipline,Dominance and Submission,and Sadomasochism Practitioners: Examining the Role of the Interpersonal Theory of Suicide

To date, no study has examined rates of suicide ideation or theory‐based risk factors for suicide ideation among bondage and discipline, dominance and submission, and sadomasochism (BDSM) practitioners. Participants were 321 adults that endorsed BDSM involvement. Thirty‐seven percent of the sample indicated a nonzero level of suicide ideation. Thwarted belongingness and perceived burdensomeness (PB) were positively associated with suicide ideation and their interactive effect predicted additional variance in suicide ideation after adjusting for depressive symptoms. Overall, shame and guilt were positively associated with suicide ideation and these relations were mediated by thwarted belongingness and PB in parallel adjusting for depressive symptoms; however, there were some differences between demographic subgroups. Among BDSM practitioners, stigma‐related internalized feelings (i.e., shame and guilt) may be associated with increased thwarted belongingness and PB, which are associated with suicide ideation.     

Social Problem-Solving and Suicidal Ideation Among Homeless Youth Receiving a Cognitive Therapy Intervention: A Moderated Mediation Analysis

Despite the high prevalence of suicidal ideation and attempts among homeless youth, little research has examined how suicide prevention interventions influence suicide-related risk and protective factors, and ultimately produce positive outcome in suicidality in this population. Drawing on the Diathesis-Stress Model and the Interpersonal Theory of Suicide, the current study examined whether participation in Cognitive Therapy for Suicide Prevention (CTSP) moderated the mediation link between social problem-solving, perceived burdensomeness and thwarted belongingness, and suicidal ideation among a sample of homeless youth experiencing suicidal ideation. Social problem-solving refers to a set of cognitive, emotional, and behavioral coping responses in the face of stressful situations, and it is identified as a potent protective factor in alleviating perceived burdensomeness and thwarted belongingness, and reducing suicidal ideation. Participants included 150 homeless youth (M age = 20.99, range = 18-24; 41% female) who were randomly assigned to Cognitive Therapy for Suicide Prevention (CTSP) + Treatment as Usual (TAU) (n = 75) or Treatment as Usual alone (n = 75). Participants were assessed at baseline, 3, 6, and 9 months post-baseline. Findings showed that perceived burdensomeness mediated the association of social problem-solving with suicidal ideation only among youth participating in the CTSP condition. These findings provide evidence to support the promising effects of CTSP in enhancing the protective effects of social problem-solving on suicidal ideation through the mediating effects of perceived burdensomeness. Findings also have implications for improving intervention effectiveness with a community-based population at high risk of suicide.     

Examining the Interpersonal–Psychological Theory of Suicide in an Inpatient Veteran Sample

Suicide among veterans is a pressing public health concern. The interpersonal–psychological theory of suicide proposes that perceived burdensomeness and thwarted belongingness lead to suicidal desire, whereas the acquired capability for suicide leads to suicide attempt in the presence of suicidal desire (Joiner, 2005). Two hypotheses derived from the interpersonal–psychological theory of suicide were tested in 185 veterans (96 women) entering inpatient psychiatric treatment. Burdensomeness and its interaction with belongingness significantly predicted current suicidal ideation. The three‐way interaction between burdensomeness, belongingness, and acquired capability did not significantly predict number of past suicide attempts. Clinical implications and directions for future research are discussed.     

An Examination of the Connections Between Eating Disorder Symptoms,Perceived Burdensomeness,Thwarted Belongingness,and Suicide Risk Among Undergraduate Students

Suicide attempts and premature mortality due to suicide are elevated in people with eating disorders. Informed by the interpersonal theory of suicide, two studies examined the role of perceived burdensomeness and thwarted belongingness in explaining the association between eating disorder symptoms and suicide risk. Results indicated that various eating disorder symptoms had an indirect effect on suicide risk through perceived burdensomeness and thwarted belongingness. Targeting perceived burdensomeness and thwarted belongingness may be useful for decreasing suicide risk among undergraduates with eating disorder symptoms.     

Alcohol-related problems and risk of suicide among college students: the mediating roles of belongingness and burdensomeness

The relationship among alcohol-related problems, perceived burdensomeness, thwarted belongingness, and suicide proneness in undergraduate college students (N=996) was examined. As hypothesized, alcohol-related problems, perceived burdensomeness, and thwarted belongingness were all significantly and positively correlated with suicide proneness. The relation between experiencing alcohol-related problems and suicide proneness was, in part, accounted for by perceived burdensomeness and thwarted belongingness. Additionally, the mediation via perceived burdensomeness was significantly stronger than the mediation via thwarted belongingness. Results suggest that it would be advisable for clinicians to be aware of students' experiences with alcohol-related problems in conjunction with their levels of burdensomeness and belongingness when assessing for suicide risk.     

Suicidal Ideation and Sexual Orientation in College Students: The Roles of Perceived Burdensomeness,Thwarted Belongingness,and Perceived Rejection Due to Sexual Orientation

A theoretical model in which perceived burdensomeness and thwarted belongingness were hypothesized to account for the association between sexual orientation and suicidal ideation among college students was tested. Among 198 college students (mean age 21.28 years), gay, lesbian, and bisexual students (n = 50) reported significantly higher levels of perceived burdensomeness and suicidal ideation than heterosexual students. The relationship between sexual orientation and suicidal ideation was partially accounted for by perceived burdensomeness, but not thwarted belongingness. This indirect effect was stronger at higher levels of perceived or anticipated rejection due to one’s sexual orientation. Implications for intervention and prevention science are discussed.     

The moderating role of pessimism in the association between retrospective relational peer victimization,interpersonal risk factors,and suicide ideation

Peer victimization (PV) is a serious concern for youth and is associated with subsequent suicide ideation in young adulthood. The interpersonal theory of suicide may provide a framework for understanding suicide ideation in this population. Specifically, thwarted belongingness (TB) and perceived burdensomeness (PB) have been significantly associated with suicide ideation among young adults with a history of peer victimization. Additionally, the personality trait of pessimism is associated with elevated suicide ideation. Thus, this study tested the association between self-reported frequency of retrospective relational (i.e., verbal and indirect) PV in primary and secondary school, thwarted interpersonal needs (TB and PB), and current suicide ideation, as well as how these relations may vary based on current pessimism. Participants were 330 undergraduate students. Nonparametric bootstrap moderated mediation procedures were used to test hypotheses. Results indicated significant indirect effects of frequency of retrospective relational PV and suicide ideation through PB and TB. Contrary to predictions, results did not indicate significant moderated mediation; however, the association between PB and suicide ideation was stronger at lower pessimism levels. We also provide supplemental analysis with optimism as the moderator. These findings suggest that clinicians may consider targeting TB, PB, as well as pessimism and optimism among those with a history of relational PV when assessing and intervening on current suicide ideation. Implications, limitations, and future directions are further discussed.     

Sexual Self‐Concept Ambiguity and the Interpersonal Theory of Suicide Risk

Mechanisms (i.e., thwarted belongingness, perceived burdensomeness, hopelessness) derived from the interpersonal theory of suicide which are hypothesized to account for the relation between sexual orientation self‐concept ambiguity and active suicide ideation were examined. Participants included 349 women, among whom 42% currently self‐ascribed a non‐exclusively heterosexual sexual identity. Among women reporting higher levels of sexual self‐concept ambiguity, greater risk for active suicide ideation is found when perceptions of burden and feelings of thwarted belonging co‐occur with feelings of hopelessness. Results support relevant theory useful for understanding suicide risk among sexual minority women who acknowledge ambiguity with regard to their sexual orientation.     

The Specificity of the Interpersonal‐Psychological Theory of Suicidal Behavior for Identifying Suicidal Ideation in an Online Sample

The interpersonal‐psychological theory of suicidal behavior suggests that the combination of perceived burdensomeness and thwarted belongingness predicts suicidal ideation. However, the specificity of this prediction to suicidal ideation has not been tested. This study examined whether these constructs were consistently associated with different characteristics of suicidal ideation, and whether they were associated with mental health problems more broadly, in an online sample of 1,352 Australian adults. Findings indicated that the interaction between perceived burdensomeness and thwarted belongingness was associated only with suicidal ideation and consistent across multiple characteristics of ideation. The study broadly supported the specificity of the IPTS.     

Thwarted Belongingness in Relation to Face‐to‐Face and Online Interactions

Suicide is ranked as the tenth leading cause of death for all ages in the United States (Centers for Disease Control and Prevention, 2012). Joiner's (2005) interpersonal theory of suicide stated thwarted belongingness—the feeling of being alienated from others—and perceived burdensomeness—the feeling of being a liability to others—are the primary proximal factors leading to suicidal desire. The current study focused on thwarted belongingness and examined its relationship to face‐to‐face interactions and online interactions in both an undergraduate and community sample. We hypothesized that negative face‐to‐face and online interactions would be independently associated with higher levels of thwarted belongingness. Furthermore, we hypothesized that face‐to‐face interactions would moderate the relationship between online interactions and thwarted belongingness and that online interactions would moderate the relationship between face‐to‐face interactions and thwarted belongingness. Three hundred eighty‐seven participants (79.6% female) at a southern university and 209 (62.7% male) participants recruited from Amazon's Mechanical Turk website completed an online survey. Results only partially supported hypotheses, with only face‐to‐face interactions shown to be independently related to higher levels of thwarted belongingness. These findings indicated that negative face‐to‐face interactions may contribute to higher levels of risk factors for suicide ideation and highlighted the importance of assessing for negative interactions across all contexts.     

Integrating the Interpersonal Psychological Theory of Suicide Into the Depression/Suicidal Ideation Relationship: A Short-Term Prospective Study

We examined the hypothesis that depressive symptoms are associated with increased beliefs about perceived burdensomeness and thwarted belongingness identified in the interpersonal psychological theory of suicide and that these beliefs are associated with changes in suicidal ideation. Participants with clinical levels of depressive symptoms (n = 299) were selected from a larger group (n = 508) and completed measures of depressive symptoms, perceived burdensomeness and thwarted belongingness, and suicidal ideation twice over a period of 2 months. Results of a structural equation model found that depressive symptoms were associated with increases in burdensomeness and lack of belonging, which were associated with suicidal ideation. Moreover, this hypothesized integrated model demonstrated a significantly better fit than an alternative model that assumed burdensomeness and lack of belonging were associated with changes in depressive symptoms, which were associated with suicidal ideation. Our findings suggest that the well-established relationship between depressive symptoms and suicidal ideation is associated with changes in beliefs that one is a burden on others and lacks belonging. More generally, these results suggest that it may be fruitful to integrate theories of suicide risk to form a comprehensive model that can inform future research and clinical interventions.     

Evaluating the Interpersonal Needs Questionnaire: Comparison of the Reliability,Factor Structure,and Predictive Validity across Five Versions

Five versions of the Interpersonal Needs Questionnaire (INQ), a self‐report measure of perceived burdensomeness and thwarted belongingness, have been used in recent studies (including 10‐, 12‐, 15‐, 18‐, and 25‐items). Findings regarding the associations between perceived burdensomeness, thwarted belongingness, and suicidal ideation using different versions have been mixed, potentially due to differences in measurement scales. This study evaluated factor structure, internal consistency, and concurrent predictive validity of these five versions in three samples. Samples 1 and 2 were comprised of 449 and 218 undergraduates, respectively; Sample 3 included 114 adolescent psychiatric inpatients. All versions demonstrated acceptable internal consistency. The 10‐item version and 15‐item version demonstrated the best, most consistent model fit in confirmatory factor analyses. Both perceived burdensomeness and thwarted belongingness consistently predicted concurrent suicidal ideation on the 10‐item INQ only. Future research should consider using the 15‐item or 10‐item versions.