Major Depressive Suicide Research Articles

278. DST results and completed suicide in major depressive disorder

278. DST results and completed suicide in major depressive disorder

Lifetime suicide risk in major depression: sex and age determinants

Background: Recent work has demonstrated that the lifetime suicide risk for patients with DSM IV Major Depression cannot mathematically approximate the accepted figure of 15%. Gender and age significantly affect both the prevalence of major depression and suicide risk. Methods: Gender and age stratified calculations were made on the entire population of the USA in 1994 using a mathematical algorithm. Sex specific corrections for under-reporting were incorporated into the design. Results: The lifetime suicide risks for men and women were 7% and 1%, respectively. The combined risk was 3.4%. The male:female ratio for suicide risk in major depression was 10:1 for youths under 25, and 5.6:1 for adults. Conclusions: Suicide in major depression is predominantly a male problem, although complacency towards female sufferers is to be avoided. Diagnosis of major depression is of limited help in predicting suicide risk compared to case specific factors. The male experience of depression that leads to suicide is often not identified as a legitimate medical complaint by either sufferers or professionals. Increasing help-accessing by males is a priority. Clinical implications: Patients with a history of hospitalisation; comorbidity, especially for substance abuse; and who are male, require greater vigilance for suicide risk. It may be that for males the threshold for diagnosing and treating major depression needs to be lowered. Limitations: This research is based on a mathematical algorithm to approximate a life-long longitudinal study that identifies community cases of depression. Our findings therefore rely on the validity of the statistics used. Extrapolation is limited to populations with an actual suicide rate of 17/100,000 or less and a lifetime prevalence of major depression of 17% or more.

High delta sleep-inducing peptide-like immunoreactivity in plasma in suicidal patients with major depressive disorder

Delta sleep-inducing peptide (DSIP) supposedly involves the hypothalamus-pituitary-adrenal (HPA) axis. Previous studies have shown deviated plasma DSIP-like immunoreactivity (DSIP-LI) levels, as well as abnormal DSIP-LI responses to corticotropin-releasing hormone in patients with major depressive disorder (MDD). This study was performed to investigate plasma-DSIP-LI and its association with the dexamethasone suppression test (DST) in suicide attempters. Plasma-DSIP and serum cortisol were measured before and after dexamethasone intake in 34 suicide attempters and in healthy age- and sex-matched controls. We found significantly elevated DSIP-LI levels in MDD patients (p < .005), and a significant correlation between predexamethasone cortisol and predexamethasone DSIP-LI levels in healthy controls. Postdexamethasone DSIP-LI levels increased in subjects with low predexamethasone DSIP-LI levels, whereas they decreased in subjects with high predexamethasone DSIP-LI levels. Results give some support to the theory of glucocorticoid involvement in the regulation of DSIP, and suggest altered DSIP-LI levels in suicidal MDD patients.

Subjective sleep quality and suicidality in patients with major depression

The purpose of this study was to examine the association between sleep quality and suicidality in major depressive disorder. We evaluated 41 patients with major depression by using the Pittsburgh Sleep Quality Index (PSQI) and the Schedule for Affective Disorders and Schizophrenia (SADS) suicide subscale. We found that suicidal depressive patients had significantly higher scores of subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency and PSQI global scores than nonsuicidal patients. We also found significant correlations between the SADS suicide subscale scores and most measures of the PSQI. These data suggest that there is an association between poor subjective sleep quality and suicidal behavior in patients with major depressive disorder.

Suicide: Risk factors and prevention in refractory major depression

The literature regarding risk factors for suicidal behavior in the context of major depressive episode is reviewed. An organized framework for prevention strategies is provided. Risk factors for suicide in major depression can be organized according to whether their effect is on the threshold for suicidal acts or whether they serve mainly as triggers or precipitants of suicidal acts. For patients sufficiently depressed to present for evaluation and treatment, severity of depression is a poor guide to risk for suicidal acts. The best predictors relate to the threshold or predisposition to suicidal acts in response to major depression. Although available literature on suicidal behavior focuses on major depression in general, the findings may be usefully applied in refractory depression. Guidelines for assessment and management of suicidal behavior in major depression are offered.

Suicide: Risk factors and prevention in refractory major depression

The literature regarding risk factors for suicidal behavior in the context of major depressive episode is reviewed. An organized framework for prevention strategies is provided. Risk factors for suicide in major depression can be organized according to whether their effect is on the threshold for suicidal acts or whether they serve mainly as triggers or precipitants of suicidal acts. For patients sufficiently depressed to present for evaluation and treatment, severity of depression is a poor guide to risk for suicidal acts. The best predictors relate to the threshold or predisposition to suicidal acts in response to major depression. Although available literature on suicidal behavior focuses on major depression in general, the findings may be usefully applied in refractory depression. Guidelines for assessment and management of suicidal behavior in major depression are offered. Depression and Anxiety 5:202–211, 1997. © 1997 Wiley-Liss, Inc.

Patterns of symptom change: A longitudinal analysis

Inflammation has been linked to depression and suicide risk. One inflammatory process that has been minimally investigated in this regard is cytokine-stimulated production of kynurenine (KYN) from tryptophan (TRP). Recent data suggest that KYN increases in cerebrospinal fluid (CSF) are associated with depressive symptoms secondary to immune activation. KYN may alter dopaminergic and glutamatergic tone, thereby contributing to increased arousal, agitation and impulsivity – important risk factors in suicide. We hypothesized that patients with major depressive disorder (MDD) and a history of suicide attempt would have higher levels of KYN than depressed nonattempters, who in turn would have higher levels than healthy volunteers.Plasma KYN, TRP, and neopterin were assayed by high performance liquid chromatography in three groups: healthy volunteers (n = 31) and patients with MDD with (n = 14) and without (n = 16) history of suicide attempt. Analysis of variance tested for group differences in KYN levels.KYN levels differed across groups (F = 4.03, df = (2,58), and p = 0.023): a priori planned contrasts showed that KYN was higher in the MDD suicide attempter subgroup compared with MDD non-attempters (t = 2.105, df = 58, and p = 0.040), who did not differ from healthy volunteers (t = 0.418, df = 58, and p = 0.677). In post hoc testing, KYN but not TRP was associated with attempt status, and only suicide attempters exhibited a positive correlation of the cytokine activation marker neopterin with the KYN:TRP ratio, suggesting that KYN production may be influenced by inflammatory processes among suicide attempters.These preliminary results suggest that KYN and related molecular pathways may be implicated in the pathophysiology of suicidal behavior.

P-13 Cholesterol and suicidality in major depression: a pilot study

P-13 Cholesterol and suicidality in major depression: a pilot study

Suicide in psychotic major depression

A sample of unipolar DSM-III-R major depressive suicide victims representing all suicides in current unipolar major depression within 1 year in Finland was carefully examined by psychological autopsy. The sample was divided into currently psychotic ( n=24) or non-psychotic ( n=46) subgroups, the psychotic subgroup was described and the two subgroups were compared. The majority (79%) of psychotic as well as nonpsychotic (87%) major depressive suicide victims were found to be complicated, comorbid cases. No major differences between the psychotic and nonpsychotic subgroups were found in sociodemographic features, comorbidity, clinical history or communication of suicide intent. However, the psychotic victims were more likely to have used violent suicide methods (88% vs. 59%).

Suicide in major depression.

The purpose of this study was to examine a sample representing all suicide victims with current DSM-III-R major depression in Finland within 1 year in aspects relevant to suicide prevention, including comorbidity, clinical history, current treatment, suicide methods, and communication of suicide intent. Using the psychological autopsy method, the authors examined all 71 suicide victims with current unipolar DSM-III-R major depression, taken from a random sample of 229 subjects representing 16.4% of all suicide victims in Finland in 1 year. The majority (85%) were complicated cases with comorbid diagnoses, and comorbidity varied according to the subjects' sex and age. Three-quarters had a history of psychiatric treatment, but only 45% were receiving psychiatric treatment at the time of death. Most suicide victims had received no treatment for depression. Only 3% had received antidepressants in adequate doses, 7% weekly psychotherapy, and 3% ECT. None of the 24 psychotic subjects had received adequate psychopharmacological treatment. Few (8%) had used an antidepressant overdose as a suicide method. Men had received less treatment for depression and had more commonly used violent suicide methods. Although about half of the suicide victims with major depression were receiving psychiatric care at the time of death, few were receiving adequate treatment for depression. There were significant sex differences in current and previous treatment and suicide methods. For suicide prevention in major depression, it would seem crucial to improve treatment and follow-up, for males with major depression, in particular.

Risks for Suicidality in Major Depressive Disorder

This investigation developed a hierarchical multiple regression model to assess the potential risk factors for suicidality in youths 7 to 17 years old. Variables were assessed in three domains: self-perceptions, demography and diagnosis, and home/environment. The model controlled for major depressive disorder (MDD), which has confounded previous investigations, by evaluating potential risks in a diagnostically heterogenous sample, and then evaluating these risks in a subsample with MDD. Conduct problems and depressive thinking emerged as the most powerful predictors in both samples. Hopelessness, life stress, and maternal psychopathology predicted suicidality only in the total sample. Separation anxiety protected MDD youths. These results suggest that suicidal MDD youths may comprise a distinct subgroup of depressed youths.