Mental disorders, comorbidity and suicidal behavior: results from the National Comorbidity Survey Replication

School performance and hospital admission due to unipolar depression: a three-generational study of social causation and social selection

PURPOSE

Both "social causation" and "social selection" offer plausible explanations for an association between education and mental health. We aimed to explore these processes in unipolar depression, with a specific focus on school performance and family tradition of education.

METHOD

Grandchildren (N = 28,089, 49% female, aged 13-47 years in 2002) of a cohort born in Uppsala, Sweden, in 1915-1929 were studied in national registers. We obtained data on final grade point average (GPA) in compulsory school, hospitalizations for unipolar depression, grandparental/parental education and other parental social characteristics. Hospitalization in adolescence and adulthood were studied separately, as were hospitalization for depression with or without a lifetime externalizing disorder.

RESULTS

Low compulsory school GPA (1-2 SD or >2 SD below average vs. average GPA) was associated with increased rate of adolescent hospitalization for unipolar depression, both with externalizing comorbidity [hazard ratio (HR) point estimates of 66-80] and without (HR point estimates of 4-6). By contrast, low GPA was only associated with first-time hospitalization in adulthood for the subgroup with externalizing comorbidity (HR point estimates of 4-6). These associations were largely independent of family education and social characteristics. Overall, low parental/grandparental education was not related to increased rates of hospitalization.

CONCLUSION

The association between school performance and hospitalization for depression depended on adolescent hospitalization or externalizing comorbidity, suggesting that disorders with an early onset are decisive. Contrary to the social patterning of many health outcomes, low grandparental/parental education did not appear to increase the rate of hospitalization for unipolar depression in the offspring.

A nationwide, population-based, long-term follow-up study of repeated self-harm in Taiwan

Background

Previous follow-up studies of repeated self-harm show that the cumulative risk of repeated self-harm within one year is 5.7%–15%, with females at greatest risk. However, relatively few studies have focused on the Far East. The objective of this study was to calculate the cumulative risk of repeated self-harm over different lengths of follow-up time (3 months, 6 months, and 1–8 years), to determine factors influencing repeated self-harm and to explore the interaction between gender and self-harm methods.

Methods

We used self-harm patient who hospitalized due to first-time self-harm between 2000 and 2007 from 1,230 hospitals in Taiwan. Hospitalization for repeated self-harm among members of this cohort was tracked after 3 months, 6 months, and 1–8 years. Tracking continued until December 31, 2008. We analyzed the cumulative risk and risk factors of repeated self-harm by using negative binomial regression.

Results

Of the 39,875 individual study samples, 3,388 individuals (8.50%) were found to have repeatedly self-harmed. The cumulative risk of repeated self-harm within three months was 7.19% and within one year was 8%. Within 8 years, it was 8.70%. Females were more likely to repeatedly self-harm than males (RR = 1.21, 95% CI = 1.15–1.76). The main method of self-harm was solid or liquid substances (RR = 1.88, 95% CI = 1.23–2.04) or cutting or piercing (RR = 1.36, 95% CI = 1.02–1.82), and in patients with psychiatric disorders were more likely to self-harm (RR = 1.61, 95% CI = 1.48–1.75).

Conclusions

The key time for intervention for repeated self-harm is within three months. Appropriate prevention programs should be developed based on gender differences.

Suicide in the US Army

Suicide in the US Army is a high-profile public health problem that is complex and poorly understood. Adding to the confusion surrounding Army suicide is the challenge of defining and understanding individuals/populations dying by suicide. Data from recent studies have led to a better understanding of risk factors for suicide that may be specifically associated with military service, including the impact of combat and deployment on increased rates of psychiatric illness in military personnel. The next steps involve applying these results to the development of empirically supported suicide prevention approaches specific to the military population. This special article provides an overview of suicide in the Army by synthesizing new information and providing clinical pearls based on research evidence.

Suicidal ideation and the subjective aspects of depression

BACKGROUND

Suicidal ideation is common in depression, but only moderately related to depression severity - in part because certain clusters of symptoms, such as those related to core mood disturbance, have a differential relationship to suicidal thinking.

METHODS

400 medication free participants with current major depression were assessed with either or both the Hamilton Depression Rating Scale (HDRS, n=396) and Beck Depression Inventory (BDI, n=366), and the Scale for Suicide Ideation (SSI). Depression rating scales were decomposed into symptoms clusters previously reported (Grunebaum et al., 2005), in order to evaluate their association to suicidal thinking.

RESULTS

Correlations between overall depression severity ratings and the measure of suicidal ideation were modest, and reduced when specific items assessing suicidal thinking on these depression scales were removed. Symptom clusters assessing Psychic Depression (HDRS), Subjective Depression (BDI), and Self-Blame (BDI) were the strongest correlates of suicidal ideation; other somatic and vegetative symptoms had little or no association to suicidal ideation. Severity of these symptom clusters effectively discriminated those with (SSI>0) and without (SSI=0) ideation; severity of these symptom clusters was less strongly associated with the severity of ideation once ideation was present.

LIMITATIONS

This is a cross-sectional study, and the dynamic relationship between changes in the severity of various depressive symptoms and change in suicidal thinking remains to be explored.

CONCLUSIONS

Depression severity is moderately associated with suicidal ideation, and accounted for primarily by core mood disturbance symptoms and self-punitive thinking. These associations may explain why suicide risk might remain high during treatment even though somatic and vegetative symptoms improve.

Predicting future suicide attempts among depressed suicide ideators: a 10-year longitudinal study

Suicidal ideation and attempts are a major public health problem. Research has identified many risk factors for suicidality; however, most fail to identify which suicide ideators are at greatest risk of progressing to a suicide attempt. Thus, the present study identified predictors of future suicide attempts in a sample of psychiatric patients reporting suicidal ideation. The sample comprised 49 individuals who met full DSM-IV criteria for major depressive disorder and/or dysthymic disorder and reported suicidal ideation at baseline. Participants were followed for 10 years. Demographic, psychological, personality, and psychosocial risk factors were assessed using validated questionnaires and structured interviews. Phi coefficients and point-biserial correlations were used to identify prospective predictors of attempts, and logistic regressions were used to identify which variables predicted future attempts over and above past suicide attempts. Six significant predictors of future suicide attempts were identified - cluster A personality disorder, cluster B personality disorder, lifetime substance abuse, baseline anxiety disorder, poor maternal relationship, and poor social adjustment. Finally, exploratory logistic regressions were used to examine the unique contribution of each significant predictor controlling for the others. Comorbid cluster B personality disorder emerged as the only robust, unique predictor of future suicide attempts among depressed suicide ideators. Future research should continue to identify variables that predict transition from suicidal thoughts to suicide attempts, as such work will enhance clinical assessment of suicide risk as well as theoretical models of suicide.

Payment source and emergency management of deliberate self-harm

OBJECTIVES

We investigated whether health insurance type (private vs Medicaid) influences the delivery of acute mental health care to patients with deliberate self-harm.

METHODS

Using National Medicaid Analytic Extract Files (2006) and MarketScan Research Databases (2005-2007), we analyzed claims focusing on emergency episodes of deliberate self-harm of Medicaid- (n=8,228) and privately (n=2,352) insured adults. We analyzed emergency department mental health assessments and outpatient mental health visits in the 30 days following the emergency visit for discharged patients.

RESULTS

Medicaid-insured patients were more likely to be discharged (62.7%), and among discharged patients they were less likely to receive a mental health assessment in the emergency department (47.8%) and more likely to receive follow-up outpatient mental health care (52.9%) than were privately insured patients (46.9%, 57.3%, and 41.2%, respectively).

CONCLUSIONS

Acute emergency management of deliberate self-harm is less intensive for Medicaid- than for privately insured patients, although discharged Medicaid-insured patients are more likely to receive follow-up care. Programmatic reforms are needed to improve access to emergency mental health services, especially in hospitals that serve substantial numbers of Medicaid-insured patients.

The importance of anxiety in both major depression and bipolar disorder

BACKGROUND

Generalized anxiety disorder (GAD) is frequently co-morbid with major depression (MDD), and this becomes more so when the duration requirement is relaxed. Both anxiety diagnoses and anxious symptoms are more common in both unipolar and bipolar depression. This paper explores the relationship between anxious symptoms and GAD with both unipolar and bipolar depression.

METHOD

MDD and bipolar disorder (BPD) are compared in three important respects: the extent of their co-morbidity with anxious symptoms and GAD, the effects that anxiety has on outcome of MDD and BPD, and the effects that anxiety has on the probability of suicide in each disorder.

RESULTS

Anxious diagnoses occur frequently in association with depressive disorders, albeit to a different extent in the various subtypes of depression. In both disorders, anxiety affects the outcome and makes suicidal thoughts, and completed suicide more likely.

CONCLUSIONS

Anxious phenomena should be assessed whenever a depressive disorder is diagnosed. It is likely that the raised expectancy of anxious phenomena is related to an individual's premorbid level of negative affect, and it is possible that suicidal phenomena are related to subthreshold hypomanic symptoms.

Prevalence, incidence and determinants of PTSD and other mental disorders: design and methods of the PID-PTSD+3 study

Investigation of the prevalence, incidence, and determinants of post-traumatic stress disorders (PTSD) and other mental disorders associated with military deployment in international missions poses several methodological and procedural challenges. This paper describes the design and sampling strategies, instruments, and experimental procedures applied in a study programme aimed to examine military deployment-related mental health and disorders (prevalence and trajectories) and to identify vulnerability and risk factors (e.g. age, gender, type of mission, rank, and duration of deployment and a wide range of neurobiological, psychological, social, and behavioural factors). The study comprised two components. The first component, a cross-sectional study, included 1483 deployed and 889 non-deployed German soldiers (response rate, 93%) who served during the 2009 International Security Assistance Force (ISAF) mission. A standardized diagnostic instrument (Composite International Diagnostic Interview, CIDI) coupled with established questionnaires was administered to detect and diagnose PTSD and a broad spectrum of mental disorders and mental health problems. The second component, a prospective-longitudinal study, included 621 soldiers examined before (2011) and after return (2012) from the ISAF mission. In addition to the CIDI and questionnaires, several experimental behavioural tests and biological markers were implemented to probe for incident mental disorders, mental health problems and risk factors. Our methods are expected to provide greater precision than previous studies for estimating the risk for incident deployment-related and non-deployment-related disorders and their risk factors. We expect the findings to advance our understanding of a wide spectrum of adverse mental health outcomes beyond PTSD.

Do depression and anxiety converge or diverge in their association with suicidality?

Depressive disorders have been strongly linked to suicidality, but the association with anxiety disorders is less well established. This exploratory study aims to examine whether anxiety and depressive disorders are both independent risk factors for suicidal ideation and attempted suicide, and additionally examined the role of specific clinical characteristics (disorder type, severity, duration, onset age) in suicidality. Data are from 1693 persons with a current (6-month) CIDI based depressive or anxiety disorder and 644 healthy controls participating in the baseline measurement of the Netherlands Study of Depression and Anxiety, which is an existing dataset. Suicidal ideation in the week prior to baseline and attempted suicide ever in life were assessed. Results showed that compared to persons with only an anxiety disorder, persons with a depressive disorder were at significantly higher risk to have current suicidal ideation or a history of attempted suicide. When examining the association between type of disorder and suicidality the odds ratio for MDD was significantly higher than those for the separate anxiety disorders. Although depression and anxiety severity were univariate risk indicators for suicidal ideation and attempted suicide, only depression severity remained a risk indicator for suicidal ideation and attempted suicide in multivariate analyses. Additional risk indicators were an early age at disorder onset for both suicidal ideation and attempted suicide, male gender for suicidal ideation and lower education for attempted suicide. These findings suggest that although anxiety and depression tend to converge in many important areas, they appear to diverge with respect to suicidality.

Anxiety sensitivity cognitive concerns predict suicidality among smokers

BACKGROUND

Anxiety along with anxiety-related risk factors is receiving increased attention in regard to its role in elevated suicidality. One such risk factor, anxiety sensitivity (AS), refers to a fear of anxiety-related symptoms. Emerging research indicates that components of AS, particularly the AS subfactor focused on cognitive arousal concerns, are significantly associated with elevated suicidality in samples of diverse clinical outpatients, clinical outpatients with PTSD symptoms, and Air Force cadets undergoing a stressful life experience. Cigarette smokers represent another relevant population for this line of research due to recent reports indicating that cigarette smoking and nicotine dependence may be related to elevated suicidality.

METHODS

Study 1 examined the role of AS and the AS subfactors in a large sample (n=343) of community adult smokers. Study 2 examined the role of AS and AS subfactors in a sample of "pack-a-day" adult smokers (n=78) who were seeking outpatient treatment for substance abuse issues.

RESULTS

Study 1 results were consistent with our a priori hypothesis that AS cognitive concerns would be significantly associated with suicidality. Additionally, after covarying for relevant substance use variables, Study 2 results were also consistent with our hypothesis that AS cognitive concerns were significantly associated with suicidality.

LIMITATIONS

Limitations included the use of suicide related outcomes, not death by suicide, and cross-sectional design.

CONCLUSIONS

These findings suggest that suicide potential in cigarette smokers may be related to AS cognitive concerns and add to the emerging literature suggesting AS cognitive concerns are a risk factor for suicidality.

Differentiating adolescent self-injury from adolescent depression: possible implications for borderline personality development

Self-inflicted injury (SII) in adolescence marks heightened risk for suicide attempts, completed suicide, and adult psychopathology. Although several studies have revealed elevated rates of depression among adolescents who self injure, no one has compared adolescent self injury with adolescent depression on biological, self-, and informant-report markers of vulnerability and risk. Such a comparison may have important implications for treatment, prevention, and developmental models of self injury and borderline personality disorder. We used a multi-method, multi-informant approach to examine how adolescent SII differs from adolescent depression. Self-injuring, depressed, and typical adolescent females (n = 25 per group) and their mothers completed measures of psychopathology and emotion regulation, among others. In addition, we assessed electrodermal responding (EDR), a peripheral biomarker of trait impulsivity. Participants in the SII group (a) scored higher than depressed adolescents on measures of both externalizing psychopathology and emotion dysregulation, and (b) exhibited attenuated EDR, similar to patterns observed among impulsive, externalizing males. Self-injuring adolescents also scored higher on measures of borderline pathology. These findings reveal a coherent pattern of differences between self-injuring and depressed adolescent girls, consistent with theories that SII differs from depression in etiology and developmental course.

Suicide attempts versus nonsuicidal self-injury among individuals with anxiety disorders in a nationally representative sample

BACKGROUND

This study is aimed to determine whether anxiety disorders are associated with suicide attempts with intent to die and to further investigate the characteristics of deliberate self-harm (DSH) among anxiety disorders.

METHOD

Data came from the Collaborative Psychiatric Epidemiological Surveys (N = 20,130; age 18 years and older; response rate = 72.3%). DSM-IV anxiety disorders were assessed using the World Mental Health Composite International Diagnostic Interview. People with an anxiety disorder endorsing a history of DSH were subcategorized as those who made suicide attempts (n = 159; individuals who intended to die), versus those who made nonsuicidal self-injuries (n = 85; individuals who did not intend to die).

RESULTS

Anxiety disorders were associated with both suicide attempts and nonsuicidal self-injury (NSSI). People with generalized anxiety disorder and social phobia who engaged in DSH were more likely to have made a suicide attempt than a NSSI, independent of the effects of mood and substance use disorders. In addition, individuals with generalized anxiety disorder and social phobia who engaged in DSH were more likely to engage in this behavior multiple times, and at least one of those times was a suicide attempt.

CONCLUSION

This study suggests that anxiety disorders are associated with suicide attempts with intent to die. Social phobia and generalized anxiety disorder appear to be associated with the more worrisome patterns of DSH including multiple suicide attempts.

Role of anxiety sensitivity subfactors in suicidal ideation and suicide attempt history

BACKGROUND

Anxiety along with anxiety-related risk factors has been increasingly implicated in suicidal ideation and suicide attempts. One such risk factor, anxiety sensitivity (AS), refers to fear of anxiety-related sensations. Subfactors of AS, notably physical and cognitive concerns, seem to be relevant to acquired capability, a risk factor for death by suicide from Joiner's (2005) Interpersonal-Psychological Theory of Suicide.

METHODS

This study examined the effect of Anxiety Sensitivity Index (ASI) total score and subfactor scores on suicidal ideation and suicide attempt history in a very large, moderately severe outpatient sample (N = 1,378).

RESULTS

Analyses were consistent with our a priori predictions about ASI cognitive concern and suicidal ideation. In contrast, ASI physical concerns did not predict previous suicide attempt as well as ASI cognitive or social concerns. However, ASI physical concerns did moderate the relationship between ASI social concerns and previous suicide attempt.

CONCLUSIONS

These findings suggest that suicide potential may be related to cognitive risk factors for anxiety.

Sleep problems outperform depression and hopelessness as cross-sectional and longitudinal predictors of suicidal ideation and behavior in young adults in the military

BACKGROUND

Sleep problems appear to represent an underappreciated and important warning sign and risk factor for suicidal behaviors. Given past research indicating that disturbed sleep may confer such risk independent of depressed mood, in the present report we compared self-reported insomnia symptoms to several more traditional, well-established suicide risk factors: depression severity, hopelessness, PTSD diagnosis, as well as anxiety, drug abuse, and alcohol abuse symptoms.

METHODS

Using multiple regression, we examined the cross-sectional and longitudinal relationships between insomnia symptoms and suicidal ideation and behavior, controlling for depressive symptom severity, hopelessness, PTSD diagnosis, anxiety symptoms, and drug and alcohol abuse symptoms in a sample of military personnel (N=311).

RESULTS

In support of a priori hypotheses, self-reported insomnia symptoms were cross-sectionally associated with suicidal ideation, even after accounting for symptoms of depression, hopelessness, PTSD diagnosis, anxiety symptoms and drug and alcohol abuse. Self-reported insomnia symptoms also predicted suicide attempts prospectively at one-month follow up at the level of a non-significant trend, when controlling for baseline self-reported insomnia symptoms, depression, hopelessness, PTSD diagnosis and anxiety, drug and alcohol abuse symptoms. Insomnia symptoms were unique predictors of suicide attempt longitudinally when only baseline self-reported insomnia symptoms, depressive symptoms and hopelessness were controlled.

LIMITATIONS

The assessment of insomnia symptoms consisted of only three self-report items. Findings may not generalize outside of populations at severe suicide risk.

CONCLUSIONS

These findings suggest that insomnia symptoms may be an important target for suicide risk assessment and the treatment development of interventions to prevent suicide.

An interactive model of anxiety sensitivity relevant to suicide attempt history and future suicidal ideation

Recent reports of increasing suicide rates among military personnel indicate a need for increased work in understanding processes relevant to suicide risk in the military. Anxiety, along with anxiety-related risk factors have been implicated in suicidality as well as posttraumatic stress disorder (PTSD). One such risk factor, anxiety sensitivity (AS), refers to fear of anxiety-related symptoms. Subfactors of AS, notably the physical and cognitive concerns factors, appear to be relevant to the construct of acquired capability for suicidal behavior, a risk factor for death by suicide postulated by the Interpersonal-Psychological Theory of Suicide (Joiner, 2005; Van Orden et al., 2010). Study 1 examined the interaction of AS-cognitive concerns and AS-physical concerns in an outpatient sample with PTSD symptomatology (N = 128). Analyses were consistent with our a priori model and indicated that the interaction of AS-cognitive concerns by AS-physical concerns predicted previous suicide attempt. Specifically, those with high AS-cognitive concerns and low AS-physical concerns were at increased risk for suicide attempt. Study 2 prospectively examined the associations between AS and suicidal ideation in a sample of military cadets undergoing basic training (N = 1081). A similar interaction emerged such that high AS-cognitive and low AS-physical scores at Time 1 significantly predicted suicidal ideation several months later, even after controlling for Time 1 suicidal ideation and psychopathology. These findings suggest that suicide potential may be related to interactions between cognitive risk factors for anxiety among individuals with PTSD symptomatology as well as individuals experiencing stressful life events.

Pilot randomized clinical trial of an SSRI vs bupropion: effects on suicidal behavior, ideation, and mood in major depression

Randomized controlled trials in depressed patients selected for elevated suicidal risk are rare. The resultant lack of data leaves uncertainty about treatment in this population. This study compared a serotonin reuptake inhibitor with a noradrenergic/dopaminergic antidepressant in major depression with elevated suicidal risk factors. We conducted a double-blind, randomized, clinical pilot trial of paroxetine (N=36) or bupropion (N=38) in DSM IV major depression with a suicide attempt history or current suicidal ideation. The effects during acute (8 weeks) and continuation treatment (up to 16 weeks) were measured. Main outcomes were suicidal behavior and ideation. The secondary outcome was modified 17-item Hamilton Depression Rating Scale score subtracting the suicide item (mHDRS-17). Treatment was not associated with time to a suicidal event and no treatment main effect or treatment × time interaction on suicidal ideation or mHDRS-17 was found. Exploratory model selection showed modest advantages for paroxetine on: (1) mHDRS-17 (p=0.02); and (2) in a separate model adjusted for baseline depression, for suicidal ideation measured with the Beck Scale for Suicidal Ideation (p=0.03), with benefit increasing with baseline severity. Depressed patients with greater baseline suicidal ideation treated with paroxetine compared with bupropion appeared to experience greater acute improvement in suicidal ideation, after adjusting for global depression. Given the lack of evidence-based pharmacotherapy guidelines for suicidal, depressed patients-an important public health population-this preliminary finding merits further study.

A cross-sectional survey of prevalence and correlates of suicidal ideation and suicide attempts among prisoners in New South Wales, Australia

BACKGROUND

We aimed to estimate the prevalence of suicidal ideation and suicide attempt among prisoners in New South Wales, Australia; and, among prisoners reporting suicidal ideation, to identify factors associated with suicide attempt.

METHODS

A cross-sectional design was used. Participants were a random, stratified sample of 996 inmates who completed a telephone survey. The estimated population prevalence of suicidal ideation and suicide attempt were calculated and differences by sex and Aboriginality were tested using χ2 tests. Correlates of suicidal ideation and suicide attempt were tested using logistic regression.

RESULTS

One-third of inmates reported lifetime suicidal ideation and one-fifth had attempted suicide. Women and Aboriginal participants were significantly more likely than men and non-Aboriginal participants, respectively, to report attempting suicide. Correlates of suicidal ideation included violent offending, traumatic brain injury, depression, self-harm, and psychiatric hospitalisation. Univariate correlates of suicide attempt among ideators were childhood out-of-home care, parental incarceration and psychiatric hospitalization; however, none of these remained significant in a multivariate model.

CONCLUSIONS

Suicidal ideation and attempts are highly prevalent among prisoners compared to the general community. Assessment of suicide risk is a critical task for mental health clinicians in prisons. Attention should be given to ensuring assessments are gender- and culturally sensitive. Indicators of mental illness may not be accurate predictors of suicide attempt. Indicators of childhood trauma appear to be particularly relevant to risk of suicide attempt among prisoners and should be given attention as part of risk assessments.

Smoking and suicidal behaviours in a sample of US adults with low mood: a retrospective analysis of longitudinal data

OBJECTIVE

To investigate whether: (1) smoking predicts suicide-related outcomes (SROs), (2) prior SRO predicts smoking, (3) smoking abstinence affects the risk of SRO and (4) psychiatric comorbidity modifies the relationship between smoking and SRO.

DESIGN

Retrospective analysis of longitudinal data obtained in wave 1 (2001-2002) and wave 2 (2004-2005) of the National Epidemiologic Survey on Alcohol and Related Conditions.

SETTING

Face-to-face interviews conducted with persons in the community.

PARTICIPANTS

US adults (N=43 093) aged 18 years or older were interviewed in wave 1 and reinterviewed (N=34 653) 3 years later. For the present study, the sample was the subset of persons (N=7352) who at the wave 2 interview reported low mood lasting 2 weeks or more during the past 3 years and were further queried regarding SRO occurring between waves 1 and 2.

OUTCOME MEASURES

SRO composed of any of the following: (1) want to die, (2) suicidal ideation, (3) suicide attempt, reported at wave 2. Current smoking reported at wave 2.

RESULTS

Current and former smoking in wave 1 predicted increased risk for wave 2 SRO independently of prior SRO, psychiatric history and socio-demographic characteristics measured in wave 1 (adjusted OR (AOR)=1.41, 95% CI 1.28 to 1.55 for current smoking; AOR=1.32, 95% CI 1.21 to 1.43 for former smoking). Prior SRO did not predict current smoking in wave 2. Compared with persistent never-smokers, risk for future SRO was highest among relapsers (AOR=3.42, 95% CI 2.85 to 4.11), next highest among smoking beginners at wave 2 (AOR=1.82, 95% CI 1.51 to 2.19) and lowest among long-term (4+ years) former smokers (AOR=1.22, 95% CI 1.12 to 1.34). Compared with persistent current smokers, risk for SRO was lower among long-term abstainers (p<0.0001) but not among shorter-term abstainers (p=0.26).

CONCLUSIONS

Smoking increased the risk of future SRO independently of psychiatric comorbidity. Abstinence of several years duration reduced that risk.

Associations between Overall and Abdominal Obesity and Suicidal Ideation among US Adult Women

Obesity is associated with increased risks for mental disorders. This study examined associations of obesity indicators including body mass index (BMI), waist circumference, and waist-height ratio with suicidal ideation among U.S. women. We analyzed data from 3,732 nonpregnant women aged ≥20 years who participated in the 2005-2008 National Health and Nutrition Examination Survey. We used anthropometric measures of weight, height, and waist circumference to calculate BMI and waist-height ratio. Suicidal ideation was assessed using the Item 9 of the Patient Health Questionnaire-9. Odds ratios with 95% conference intervals were estimated using logistic regression analyses after controlling for potential confounders. The age-adjusted prevalence of suicidal ideation was 3.0%; the prevalence increased linearly across quartiles of BMI, waist circumference, and waist-height ratio (P for linear trend <0.01 for all). The positive associations of waist circumference and waist-height ratio with suicidal ideation remained significant (P < 0.05) after adjustment for sociodemographics, lifestyle-related behavioral factors, and having either chronic conditions or current depression. However, these associations were attenuated after both chronic conditions and depression were entered into the models. Thus, the previously reported association between obesity and suicidal ideation appears to be confounded by coexistence of chronic conditions and current depression among women of the United States.

Stressful life events and suicidal behavior in adults with alcohol use disorders: role of event severity, timing, and type

BACKGROUND

Stressful life events (SLEs) play a key role in suicidal behavior among adults with alcohol use disorders (AUD), yet there are meager data on the severity of SLEs preceding suicidal behavior or the timing of such events.

METHOD

Patients in residential substance use treatment who made a recent suicide attempt (cases, n=101) and non-suicidal controls matched for site (n=101) were recruited. SLEs that occurred within 30 days of the attempt and on the day of the attempt in cases were compared to SLEs that occurred in the corresponding periods in controls. SLEs were categorized by type (interpersonal, non-interpersonal) and severity (major, minor) and were dated to assess timing. Degree of planning of suicide attempts was also assessed.

RESULTS

Major interpersonal SLEs conferred risk for a suicide attempt, odds ratio (95% CI)=5.50 (1.73, 17.53), p=0.005. Cases were also more likely to experience an SLE on the day of the attempt than on the corresponding day in controls, OR (95% CI)=6.05 (1.31, 28.02), p=0.021. However, cases that made an attempt on the day of a SLE did not make lower planned suicide attempts compared to other cases, suggesting that suicide attempts that are immediately preceded by SLEs cannot be assumed to be unplanned.

CONCLUSIONS

Results suggest the central importance of major interpersonal SLEs in risk among adults with AUD, a novel finding, and documents that SLEs may lead to suicide attempts within a short window of time (i.e., same day), a daunting challenge to prevention efforts.

The association between the Kessler 10 and suicidality: a cross-sectional analysis

OBJECTIVE

The aims of this study were to test the psychometric properties of the Kessler 10 (K10) in a clinical setting and to investigate the utility of the K10 as a means for identifying suicidality.

METHODS

One hundred forty-nine inpatients at an inpatient psychiatric hospital completed a battery of assessments during their inpatient hospital stay. Factor analysis provided information suggesting multiple factor loadings present within the K10. A series of t tests examined differences of group means between suicidal participants and a control group, whereas multiple regression models examined the correlation between the K10 and several suicide-specific assessments.

MAIN RESULTS

The K10 seems to be composed of 2 primary factors (depression and anxiety) and differentiated suicidal and nonsuicidal inpatients and was associated with several measures related to suicidality.

CONCLUSIONS

The observed results indicate that the K10 may be an effective screener to measure occult suicidality in a clinical setting.

Examining potential contraindications for prolonged exposure therapy for PTSD

Although prolonged exposure (PE) has received the most empirical support of any treatment for post-traumatic stress disorder (PTSD), clinicians are often hesitant to use PE due to beliefs that it is contraindicated for many patients with PTSD. This is especially true for PTSD patients with comorbid problems. Because PTSD has high rates of comorbidity, it is important to consider whether PE is indeed contraindicated for patients with various comorbid problems. Therefore, in this study, we examine the evidence for or against the use of PE with patients with problems that often co-occur with PTSD, including dissociation, borderline personality disorder, psychosis, suicidal behavior and non-suicidal self-injury, substance use disorders, and major depression. It is concluded that PE can be safely and effectively used with patients with these comorbidities, and is often associated with a decrease in PTSD as well as the comorbid problem. In cases with severe comorbidity, however, it is recommended to treat PTSD with PE while providing integrated or concurrent treatment to monitor and address the comorbid problems.

Parental psychopathology and the risk of suicidal behavior in their offspring: results from the World Mental Health surveys

Previous research suggests that parental psychopathology predicts suicidal behavior among offspring; however, the more fine-grained associations between specific parental disorders and distinct stages of the pathway to suicide are not well understood. We set out to test the hypothesis that parental disorders associated with negative mood would predict offspring suicide ideation, whereas disorders characterized by impulsive aggression (for example, antisocial personality) and anxiety/agitation (for example, panic disorder) would predict which offspring act on their suicide ideation and make a suicide attempt. Data were collected during face-to-face interviews conducted on nationally representative samples (N=55 299; age 18+) from 21 countries around the world. We tested the associations between a range of parental disorders and the onset and persistence over time (that is, time since most recent episode controlling for age of onset and time since onset) of subsequent suicidal behavior (suicide ideation, plans and attempts) among offspring. Analyses tested bivariate and multivariate associations between each parental disorder and distinct forms of suicidal behavior. Results revealed that each parental disorder examined increased the risk of suicide ideation among offspring, parental generalized anxiety and depression emerged as the only predictors of the onset and persistence (respectively) of suicide plans among offspring with ideation, whereas parental antisocial personality and anxiety disorders emerged as the only predictors of the onset and persistence of suicide attempts among ideators. A dose-response relation between parental disorders and respondent risk of suicide ideation and attempt was also found. Parental death by suicide was a particularly strong predictor of persistence of suicide attempts among offspring. These associations remained significant after controlling for comorbidity of parental disorders and for the presence of mental disorders among offspring. These findings should inform future explorations of the mechanisms of intergenerational transmission of suicidal behavior.

Suicide attempts and overdoses among adults entering addictions treatment: comparing correlates in a U.S. National Study

BACKGROUND

Suicide attempts and non-fatal overdoses are both associated with substance use. The aim of the present study was to examine correlates of suicide attempts and non-fatal overdoses simultaneously among individuals seeking addictions treatment.

METHODS

A large U.S. national sample of individuals entering addictions treatment participated in a cross-sectional survey (n=5892). Multinomial logistic regression modeling tested the adjusted associations of violence, injection drug use, specific substances, and depressive symptoms with a four-category outcome variable based on prior histories of suicide attempt and non-fatal overdose (neither, suicide attempt only, overdose only, both), adjusting for demographic and treatment characteristics.

RESULTS

Sexual and physical victimization was associated with suicide attempts with or without overdoses (ORs 1.25-2.84), while perpetrating violence was associated with having experienced either or both outcomes (ORs 1.25-1.56). Depressive symptoms had a stronger association with suicide attempts (OR=3.05) than overdoses (OR=1.29). Injection drug use was associated with overdoses with or without suicide attempts (ORs 2.65-3.22). Individuals seeking treatment for marijuana use were less likely have overdosed or attempted suicide (ORs 0.39-0.67), while individuals seeking treatment for heroin use were more likely to have overdosed (OR=1.46). Seeking treatment for use of more than one substance was associated with overdose and overdose and suicide attempt (ORs 1.58-2.51), but not suicide attempt alone.

CONCLUSIONS

The present findings indicate that suicide and overdose are connected yet distinct problems. Individuals who have had a history of both may be a group with particularly poor psychological functioning as well as more severe drug-related problems.

Chronic stress induces sex-specific alterations in methylation and expression of corticotropin-releasing factor gene in the rat

BACKGROUND

Although the higher prevalence of depression in women than in men is well known, the neuronal basis of this sex difference is largely elusive.

METHODS

Male and female rats were exposed to chronic variable mild stress (CVMS) after which immediate early gene products, corticotropin-releasing factor (CRF) mRNA and peptide, various epigenetic-associated enzymes and DNA methylation of the Crf gene were determined in the hypothalamic paraventricular nucleus (PVN), oval (BSTov) and fusiform (BSTfu) parts of the bed nucleus of the stria terminalis, and central amygdala (CeA).

RESULTS

CVMS induced site-specific changes in Crf gene methylation in all brain centers studied in female rats and in the male BST and CeA, whereas the histone acetyltransferase, CREB-binding protein was increased in the female BST and the histone-deacetylase-5 decreased in the male CeA. These changes were accompanied by an increased amount of c-Fos in the PVN, BSTfu and CeA in males, and of FosB in the PVN of both sexes and in the male BSTov and BSTfu. In the PVN, CVMS increased CRF mRNA in males and CRF peptide decreased in females.

CONCLUSIONS

The data confirm our hypothesis that chronic stress affects gene expression and CRF transcriptional, translational and secretory activities in the PVN, BSTov, BSTfu and CeA, in a brain center-specific and sex-specific manner. Brain region-specific and sex-specific changes in epigenetic activity and neuronal activation may play, too, an important role in the sex specificity of the stress response and the susceptibility to depression.

The association between delusional-like experiences and suicidal thoughts and behaviour

BACKGROUND

Delusional-like experiences (DLEs) are common in the general population. Whilst it is well known that psychotic disorders increase the risk of suicide, it is unclear if DLEs are also associated with suicidal thoughts and behaviour. This study aims to explore these variables in a large population-based sample.

METHOD

Participants were drawn from a national survey of mental health (n=8841) in Australia. The Composite International Diagnostic Interview was used to identify DLEs, psychiatric disorders, and information related to suicidal ideation, suicide plan and suicide attempts. We examined the relationship between DLEs and suicidal ideation, plans and attempts using logistic regression, adjusted for a range of potentially confounding variables.

RESULTS

8.4% of subjects endorsed one or more DLEs. 12.9% subjects reported suicidal ideation, 3.8% suicidal plans, and 3.0% a suicide attempt at some point in their lives. Those with any DLE were about two to four times as likely to report suicidal ideation, plans or attempts. There was a dose response relationship between DLEs and endorsement of suicide-related items.

CONCLUSIONS

DLEs are common in the general population and appear to be independently associated with suicidal thoughts and behaviour. DLE may provide a marker of vulnerability to suicide, and thus could be of value in future suicide prevention research.

Suicidal ideation among adults with arthritis: prevalence and subgroups at highest risk. Data from the 2007-2008 National Health and Nutrition Examination Survey

OBJECTIVE

To evaluate the prevalence, correlates, and subgroups at highest risk for suicidal ideation among adults with arthritis.

METHODS

We used data on US adults with arthritis, ages ≥40 years, participating in the 2007-2008 National Health and Nutrition Examination Survey. Suicidal ideation was assessed by item 9 of the Patient Health Questionnaire 9 (PHQ-9). Sociodemographic factors, health behaviors, and comorbid conditions were examined as potential correlates. Depression was measured by the PHQ-8 score (range 1-24). We used random forests to identify subgroups at highest risk for suicidal ideation. To determine if any correlates were unique to arthritis, we compared results to those for persons with diabetes mellitus and cancer.

RESULTS

The prevalence ± SEM of suicidal ideation was 5.6% ± 0.8% among persons with arthritis and 2.4% ± 0.4% among those without. The most important correlates for suicidal ideation in adults with arthritis were depression, anxiety, duration of arthritis, age, income:poverty ratio, number of close friends, pain, alcohol, excessive daytime sleepiness, and comorbidities. Eleven of the 16 most important contributors for suicidal ideation among adults with arthritis were also important for people with diabetes mellitus and cancer. Among persons with arthritis, subgroups at highest risk for suicidal ideation were those with a PHQ-8 score between 18 and 24 and less than 4.5 years of arthritis (96.5%), and those with a PHQ-8 score between 7 and 17, ≥1.24 days of binges/month, and either an income of ≥$45,000/year (85.4%) or an income of <$45,000/year and >3 comorbidities (70.8%).

CONCLUSION

Depression, short duration of arthritis, binge drinking, income, and >3 comorbidities identified subgroups of adults with arthritis at greatest risk for suicidal ideation.

Latent class analysis of co-morbidity in the Adult Psychiatric Morbidity Survey in England 2007: implications for DSM-5 and ICD-11

BACKGROUND

Psychiatric co-morbidity is complex and ubiquitous. Our aim was to describe the extent, nature and patterning of psychiatric co-morbidity within a representative sample of the adult population of England, using latent class analysis.

METHOD

Data were used from the 2007 Adult Psychiatric Morbidity Survey, a two-phase national household survey undertaken in 2007 comprising 7325 participants aged 16 years and older living in private households in England. The presence of 15 common mental health and behavioural problems was ascertained using standardized clinical and validated self-report measures, including three anxiety disorders, depressive episode, mixed anxiety depressive disorder, psychosis, antisocial and borderline personality disorders, eating disorders, post-traumatic stress disorder, attention deficit disorder, alcohol and drug dependencies, problem gambling and attempted suicide.

RESULTS

A four-class model provided the most parsimonious and informative explanation of the data. Most participants (81.6%) were assigned to a non-symptomatic or 'Unaffected' class. The remainder were classified into three qualitatively different symptomatic classes: 'Co-thymia' (12.4%), 'Highly Co-morbid' (5.0%) and 'Addictions' (1.0%). Classes differed in mean numbers of conditions and impairments in social functioning, and these dimensions were correlated.

CONCLUSIONS

Our findings confirm that mental disorders typically co-occur and are concentrated in a relatively small number of individuals. Conditions associated with the highest levels of disability, mortality and cost--psychosis, suicidality and personality disorders--are often co-morbid with more common conditions. This needs to be recognized when planning services and when considering aetiology.

Predictors of suicidal ideation in veterans with PTSD related to military sexual trauma

Predictors of suicidal ideation (SI) were examined in a sample of veterans (N = 128) diagnosed with posttraumatic stress disorder (PTSD) related to military sexual trauma. Suicidal ideation was predicted by both depressive symptom severity and posttraumatic symptom severity in separate correlation analyses. When controlling for the effects of depressive and posttraumatic symptom severity on one another in the prediction of SI in a single multiple regression model, however, only depressive symptoms independently predicted SI. These analyses suggest that the contribution of PTSD symptom severity to the prediction of SI is reduced by adding depressive symptoms. Hyperarousal symptom severity, however, was found in a separate multiple regression model to contribute independently to the prediction of SI controlling for depressive symptom severity.

Suicidal or self-harming ideation in military personnel transitioning to civilian life

Suicides have markedly increased among military personnel in recent years. We used path analysis to examine factors associated with suicidal/self-harming ideation among male Navy and Marine Corps personnel transitioning to civilian life. Roughly 7% of men (Sailors = 5.3%, Marines = 9.0%) reported ideation during the previous 30 days. Results suggest that combat exposure, substance abuse, and resilience are associated with suicidal ideation/self-harming thoughts through the mediation of posttraumatic stress disorder symptoms and/or depression symptoms. Substance abuse plays a moderating role. Resilience had a direct effect only among the Marines. Implications for improving the transition to civilian life are discussed.

The suicidal mind and brain: a review of neuropsychological and neuroimaging studies

OBJECTIVES. We aimed at reviewing studies exploring dysfunctional cognitive processes, and their neuroanatomical basis, in suicidal behaviour, and to develop a neurocognitive working model. Methods. A literature search was conducted. RESULTS. Several limitations were found. The main reported neuropsychological findings are a higher attention to specific negative emotional stimuli, impaired decision-making, lower problem-solving abilities, reduced verbal fluency, and possible reduced non-specific attention and reversal learning in suicide attempters. Neuroimaging studies mainly showed the involvement of ventrolateral orbital, dorsomedial and dorsolateral prefrontal cortices, the anterior cingulate gyrus, and, to a lesser extent, the amygdala. In addition, alterations in white matter connections are suggested. CONCLUSIONS. These studies support the concept of alterations in suicidal behaviour distinct from those of comorbid disorders. We propose that a series of neurocognitive dysfunctions, some with trait-like characteristics, may facilitate the development of a suicidal crisis during stressful circumstances: (1) an altered modulation of value attribution, (2) an inadequate regulation of emotional and cognitive responses, and (3) a facilitation of acts in an emotional context. This preliminary model may represent a framework for the design of future studies on the pathophysiology, prediction and prevention of these complex human behaviours.

Practical suicide-risk management for the busy primary care physician

Suicide is a public health problem and a leading cause of death. The number of people thinking seriously about suicide, making plans, and attempting suicide is surprisingly high. In total, primary care clinicians write more prescriptions for antidepressants than mental health clinicians and see patients more often in the month before their death by suicide. Treatment of depression by primary care physicians is improving, but opportunities remain in addressing suicide-related treatment variables. Collaborative care models for treating depression have the potential both to improve depression outcomes and decrease suicide risk. Alcohol use disorders and anxiety symptoms are important comorbid conditions to identify and treat. Management of suicide risk includes understanding the difference between risk factors and warning signs, developing a suicide risk assessment, and practically managing suicidal crises.

Decreased cerebral blood flow in the limbic and prefrontal cortex using SPECT imaging in a cohort of completed suicides

Suicide has a high comorbidity with impulsivity and depression, and finding imaging biomarkers indicative of patients at high risk for suicidal behavior is invaluable to the clinician. Using single-photon emission computed tomography (SPECT) imaging, we have previously reported regional cerebral blood flow (rCBF) decreases in the medial prefrontal cortex, ventral tegmental area and subgenual cingulate cortex (Brodmann area 25 (BA 25)), a region found to be hypoperfused with treatment-resistant depression. From 2007 to 2010, we have extended our analysis to include nine additional completed suicides. In all, 27 healthy, age- and gender-matched subjects from a previously acquired healthy brain study served as controls to our 21 completed suicides. All 21 suicides had been previously diagnosed with depression according to Diagnostic and Statistical Manual of Mental Disorder-IV criterion. Voxel-by-voxel analyses were performed using statistical parametric mapping to compare the differences in technetium-99m hexamethylpropylene amine oxime brain uptake between the groups. Factor analysis of the data identified the top 10 regions of hypoperfusion in the suicidal group, including the bilateral superior frontal lobes, the right precuneus, the rolandic operculum, postcentral gyrus, left caudate and insular cortex. We also demonstrate more focal decreases in rCBF in the subgenual cingulate cortex (BA 25) in 18 subjects, supporting our previous hypothesis that hypoperfusion of BA 25 may be a risk factor for suicide in depressed patients. This work suggests that SPECT might be useful in predicting risk for suicide completion in subjects with depression or treatment-resistant depression. Further investigation of this work is necessary to better understand the predictive value of this finding.

The adult suicide-prone patient: a review of the medical literature and implications for oral and maxillofacial surgeons

PURPOSE

Suicide is the 11th most common cause of death among American adults. Some individuals who commit suicide may have been treated by oral and maxillofacial surgeons in the days preceding the event. Because suicide often is preventable, in this report we review methods that are useful in identifying individuals at risk of imminent suicide and give suggestions for obtaining interventional assistance.

METHODS

A Medline search using the key terms "suicide," "adult," and "oral surgery" was conducted. Articles selected were published in peer-reviewed journals.

RESULTS

Individuals who have told their surgeon they have no further reason to live, have developed a suicide plan, have secured a lethal device, and have previously made such an attempt are at extreme risk and require immediate intervention. Additional risk factors include being white, aged older than 45 years, and unemployed; living alone, with poor social supports; having a current mental illness or history of mental illness, including substance abuse; and having a family history of suicide. Specialty-specific patients at highest risk are those treated for oral cancer and cosmetic issues and those with adverse surgical outcomes. With regard to assessment of these individuals, the modified SAD PERSONS acronym can assist surgeons in documenting the presence of major risk factors associated with adult suicide and in facilitating communication with emergency personnel.

CONCLUSIONS

Suicide is a potentially preventable public health problem. Oral and maxillofacial surgeons can be key in elucidating clinically significant suicide potential in their patients and referring them for timely intervention.

Association between non-suicidal self-injuries and suicide attempts in Chinese adolescents and college students: a cross-section study

PURPOSE

This study examined the association between non-suicidal self-injury (NSSI) and suicide attempts among Chinese adolescents and college students.

METHODS

A total sample of 2013 Chinese students were randomly selected from five schools in Wuhan, China, including 1101 boys and 912 girls with the age ranging between 10 and 24 years. NSSI, suicidal ideation, suicide attempts and depressive symptoms were measured by self-rated questionnaires. Self-reported suicide attempts were regressed on suicidal ideation and NSSI, controlling for participants' depressive symptoms, and demographic characteristics.

RESULTS

The self-reported prevalence rates of NSSI, suicidal ideation, suicide attempts were 15.5%, 8.8%, and 3.5%, respectively. Logistic regression analyses indicated that NSSI was significantly associated with self-reported suicide attempts. Analyses examining the conditional association of NSSI and suicidal ideation with self-reported suicide attempts revealed that NSSI was significantly associated with greater risk of suicide attempts in those not reporting suicidal ideation than those reporting suicidal ideation in the past year.

CONCLUSIONS

These findings highlight the importance of NSSI as a potentially independent risk factor for suicide attempts among Chinese/Han adolescents and college students.

The effects of an Internet based self-help course for reducing panic symptoms--Don't Panic Online: study protocol for a randomised controlled trial

Background

Internet based self-help for panic disorder (PD) has proven to be effective. However, studies so far have focussed on treating a full-blown disorder. Panic symptoms that do not meet DSM-IV criteria are more prevalent than the full-blown disorder and patients with sub-clinical panic symptoms are at risk of developing PD. This study is a randomised controlled trial aimed to evaluate an Internet based self-help intervention for sub-clinical and mild PD compared to a waiting list control group.

Methods

Participants with mild or sub-clinical PD (N = 128) will be recruited in the general population. Severity of panic and anxiety symptoms are the primary outcome measures. Secondary outcomes include depressive symptoms, quality of life, loss of production and health care consumption. Assessments will take place on the Internet at baseline and three months after baseline.

Discussion

Results will indicate the effectiveness of Internet based self-help for sub-clinical and mild PD. Strengths of this design are the external validity and the fact that it is almost completely conducted online.

Trial registration

Netherlands Trial Register (NTR): NTR1639 The Netherlands Trial Register is part of the Dutch Cochrane Centre.

Suicidality and divalproex sodium: analysis of controlled studies in multiple indications

BACKGROUND

Recent analyses of antiepileptic drugs have indicated an increase in the risk of suicidality. The objective of this report was to provide clinical information and an independent meta-analysis of divalproex sodium and suicidality events by analyzing data from 13 placebo-controlled studies and 1 low-dose controlled study.

METHODS

Adverse events considered to be possibly suicide related were identified using the Columbia Classification Algorithm of Suicide Assessment (C-CASA) methodology. Indications included epilepsy, bipolar disorder, migraine prophylaxis, impulsive aggression, and dementia. Narratives were produced for every event, and suicidality event ratings were performed by a third party blinded to treatment assignment. Statistical analyses were conducted using methodology similar to that reported by the US Food and Drug Administration (FDA).

RESULTS

Suicidality events were identified in 5 of the 13 placebo-controlled studies. Of the 1,327 (0.83%) subjects taking divalproex sodium, 11 had suicidality events: 2 suicide attempts and 9 suicidal ideation. Of 992 (0.91%) subjects taking placebo, 9 had suicidality events: 1 preparatory act toward suicide, 2 suicide attempts, and 6 suicidal ideation. Across placebo-controlled studies, the overall estimated odds ratio (OR) of suicidal behavior or ideation was 0.72 (95% CI 0.29 to 1.84). The OR for suicidal behavior was 0.37 (95% CI 0.04 to 2.58), and the OR for suicidal ideation was 0.90 (95% CI 0.31 to 2.79).

CONCLUSIONS

In this meta-analysis, divalproex sodium does not appear to increase the risk of suicide-related adverse events relative to placebo in the populations studied. Clinicians should nonetheless remain vigilant in assessing suicidality, not only in patients treated for mental disorders with inherently high suicide risk, but also in patients taking antiepileptic medications.

Positive association between altitude and suicide in 2584 U.S. counties

Brenner, Barry, David Cheng, Sunday Clark, and Carlos A. Camargo, Jr. Positive association between altitude and suicide in 2584 U.S.counties. High Alt. Med. Biol. 12: 31-35 2011.-Suicide is an important public health problem worldwide. Recent preliminary studies have reported a positive correlation between mean altitude and the suicide rate of the 48 contiguous U.S.states. Because intrastate altitude may have large variation, we examined all 2584 U.S. counties to evaluate whether an independent relationship between altitude and suicide exists. We hypothesized that counties at higher elevation would have higher suicide rates. This retrospective study examines 20 yr of county-specific mortality data from 1979 to 1998. County altitude was obtained from the U.S. Geologic Survey. Statistical analysis included Pearson correlation, t tests, and multivariable linear and logistic regression. Although there was a negative correlation between county altitude and all-cause mortality (r = -0.31, p < 0.001), there was a strong positive correlation between altitude and suicide rate (r = 0.50, p < 0.001). Mean altitude differed in the 50 counties, with the highest suicide rates compared to those with the lowest rates (4684 vs. 582 ft, p < 0.001). Controlling for percent of age >50 yr, percent male, percent white, median household income, and population density of each county, the higher-altitude counties had significantly higher suicide rates than the lower-altitude counties. Similar findings were observed for both firearm-related suicides (59% of suicides) and nonfirearm-related suicides. We conclude that altitude may be a novel risk factor for suicide in the contiguous United States.

Population-attributable fractions of Axis I and Axis II mental disorders for suicide attempts: findings from a representative sample of the adult, noninstitutionalized US population

OBJECTIVES

We aimed to determine the percentage of suicide attempts attributable to individual Axis I and Axis II mental disorders by studying population-attributable fractions (PAFs) in a nationally representative sample.

METHODS

Data were from the National Epidemiologic Survey on Alcohol and Related Conditions Wave 2 (NESARC; 2004-2005), a large (N = 34 653) survey of mental illness in the United States. We used multivariate logistic regression to compare individuals with and without a history of suicide attempt across Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Axis I disorders (anxiety, mood, psychotic, alcohol, and drug disorders) and all 10 Axis II personality disorders. PAFs were calculated for each disorder.

RESULTS

Of the 25 disorders we examined in the model, 4 disorders had notably high PAF values: major depressive disorder (PAF = 26.6%; 95% confidence interval [CI] = 20.1, 33.2), borderline personality disorder (PAF = 18.1%; 95% CI = 13.4, 23.5), nicotine dependence (PAF = 8.4%; 95% CI = 3.4, 13.7), and posttraumatic stress disorder (PAF = 6.3%; 95% CI = 3.2, 10.0).

CONCLUSIONS

Our results provide new insight into the relationships between mental disorders and suicide attempts in the general population. Although many mental illnesses were associated with an increased likelihood of suicide attempt, elevated rates of suicide attempts were mostly attributed to the presence of 4 disorders.

Suicide risk and its correlate in adolescents who experienced typhoon-induced mudslides: a structural equation model

BACKGROUND

The aims of this study were to examine the direct and indirect effects of posttraumatic stress disorder (PTSD), major depressive disorder (MDD), disaster-exposure experience, gender, and perceived family support on suicide risk (including suicide ideation and attempt) in adolescents 3 months after they had experienced Typhoon Morakot-associated mudslides in Taiwan using a structural equation model (SEM).

METHODS

Two hundred and seventy-one adolescents in the worst affected mountainous regions of southern Taiwan were recruited. Suicide risk and diagnoses of PTSD and MDD were assessed using the Mini-International Neuropsychiatric Interview for Children and Adolescents. The direct and indirect effects of PTSD, MDD, disaster-exposure experience, gender, and perceived family support on suicide risk were examined using SEM.

RESULTS

The results of SEM indicated that increased disaster-exposure experience and female gender had direct influences on an increased suicide risk and indirect influences on increased suicide risk that were mediated by PTSD and MDD. Perceived high family support directly decreased suicide risk. Both PTSD and MDD had direct influences on an increased suicide risk, and PTSD had an indirect influence on an increased suicide risk that was mediated by MDD.

CONCLUSIONS

Gender, disaster-exposure experience, perceived high family support, PTSD, and MDD all had effects on suicide risk in adolescents who had experienced the threat of mudslides caused by Typhoon Morakot. The results provide healthcare professionals with a comprehensive understanding to develop intervention programs to prevent and intervene in suicide risk.

Posttraumatic stress disorder and traumatic stress: from bench to bedside, from war to disaster

War is a tragic event and its mental health consequences can be profound. Recent studies indicate substantial rates of posttraumatic stress disorder and other behavioral alterations because of war exposure. Understanding the psychological, behavioral, and neurobiological mechanism of mental health and behavioral changes related to war exposure is critical to helping those in need of care. Substantial work to encourage bench to bedside to community knowledge and communication is a core component of addressing this world health need.