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Concept: Major depressive episode

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The possible therapeutic impact of dietary changes on existing mental illness is largely unknown. Using a randomised controlled trial design, we aimed to investigate the efficacy of a dietary improvement program for the treatment of major depressive episodes.

Concepts: Randomized controlled trial, Schizophrenia, Major depressive disorder, Major depressive episode, Dysthymia, Depression, Suicide, Sickness behavior

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This study examined national trends in 12-month prevalence of major depressive episodes (MDEs) in adolescents and young adults overall and in different sociodemographic groups, as well as trends in depression treatment between 2005 and 2014.

Concepts: Major depressive disorder, Major depressive episode, Great Depression, Treatment for depression, Winston Churchill

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Although stressful life events (SLEs) predict subsequent risk of developing a major depressive episode (MDE), limited information exists on whether or not race and gender alters the predictive role of SLE on risk of MDE over a long-term period. The current study explored race and gender differences in the long-term predictive role of SLE at baseline (1986) on subsequent risk of MDE 25 years later (2011) in a nationally representative cohort in the United States.

Concepts: United States, Gender role, Race, Major depressive disorder, Major depressive episode, Seasonal affective disorder, Dysthymia, Nationalism

39

Pervasive negative thoughts about the self are central to the experience of depression. Brain imaging studies in the general population have localised self-related cognitive processing to areas of the medial pre-frontal cortex.

Concepts: Psychology, Brain, Human brain, Cognition, Hippocampus, Mind, Major depressive disorder, Major depressive episode

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Objective: The authors sought to identify diagnostic risk factors of manic, mixed, or hypomanic episodes in the offspring of parents with bipolar disorder (“high-risk offspring”). Method: High-risk offspring 6-18 years old (N=391) and demographically matched offspring (N=248) of community parents without bipolar disorder were assessed longitudinally with standardized diagnostic instruments by staff blind to parental diagnoses. Follow-up assessments were completed in 91% of the offspring (mean follow-up interval, 2.5 years; mean follow-up duration, 6.8 years). Results: Compared with community offspring, high-risk offspring had significantly higher rates of subthreshold mania or hypomania (13.3% compared with 1.2%), manic, mixed, or hypomanic episodes (9.2% compared with 0.8%), and major depressive episodes (32.0% compared with 14.9%). They also had higher rates of attention deficit hyperactivity disorder (30.7% compared with 18.1%), disruptive behavior disorders (27.4% compared with 15.3%), anxiety disorders (39.9% compared with 21.8%), and substance use disorders (19.9% compared with 10.1%), but not unipolar major depressive disorder (major depression with no bipolarity; 18.9% compared with 13.7%). Multivariate Cox regressions showed that in the high-risk offspring, subthreshold manic or hypomanic episodes (hazard ratio=2.29), major depressive episodes (hazard ratio=1.99), and disruptive behavior disorders (hazard ratio=2.12) were associated with subsequent manic, mixed, or hypomanic episodes. Only subthreshold manic or hypomanic episodes (hazard ratio=7.57) were associated when analyses were restricted to prospective data. Conclusions: Subthreshold manic or hypomanic episodes were a diagnostic risk factor for the development of manic, mixed, or hypomanic episodes in the offspring of parents with bipolar disorder and should be a target for clinical assessment and treatment research. Major depressive episodes and disruptive behavior disorders are also indications for close clinical monitoring of emergent bipolarity in high-risk offspring.

Concepts: Attention-deficit hyperactivity disorder, Bipolar disorder, Major depressive disorder, Major depressive episode, Dysthymia, Mania, Suicide, Hypomania

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SUN(^_^)D, the Strategic Use of New generation antidepressants for Depression, is an assessor-blinded, parallel-group, multicenter pragmatic mega-trial to examine the optimum treatment strategy for the first- and second-line treatments for unipolar major depressive episodes. The trial has three steps and two randomizations. Step I randomization compares the minimum and the maximum dosing strategy for the first-line antidepressant. Step II randomization compares the continuation, augmentation or switching strategy for the second-line antidepressant treatment. Step III is a naturalistic continuation phase. The original protocol was published in 2011, and we hereby report its updated protocol including the statistical analysis plan.

Concepts: Selective serotonin reuptake inhibitor, Bipolar disorder, Major depressive disorder, Major depressive episode, Bupropion, Sertraline

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About 17% of humanity goes through an episode of major depression at some point in their lifetime. Despite the enormous societal costs of this incapacitating disorder, it is largely unknown how the likelihood of falling into a depressive episode can be assessed. Here, we show for a large group of healthy individuals and patients that the probability of an upcoming shift between a depressed and a normal state is related to elevated temporal autocorrelation, variance, and correlation between emotions in fluctuations of autorecorded emotions. These are indicators of the general phenomenon of critical slowing down, which is expected to occur when a system approaches a tipping point. Our results support the hypothesis that mood may have alternative stable states separated by tipping points, and suggest an approach for assessing the likelihood of transitions into and out of depression.

Concepts: Hippocampus, Bipolar disorder, Major depressive disorder, Major depressive episode, Seasonal affective disorder, Mood disorder, Dysthymia, Types of psychological depression

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IMPORTANCE Although symptoms of irritability or anger are not central to the diagnosis of unipolar major depressive episodes (MDEs), these symptoms have been found, in cross-sectional studies, to be highly prevalent and associated with increased comorbidity and depressive illness burden. OBJECTIVE To determine the prevalence of overtly expressed irritability/anger and its effect on intake presentation and the long-term course of illness. DESIGN A prospective, naturalistic investigation of patients with unipolar MDEs, studied systematically at intake and during up to 31 years of follow-up. SETTING Five US academic medical centers. PARTICIPANTS Patients entered the National Institute of Mental Health Collaborative Depression Study during an MDE in 1978, 1979, 1980, or 1981. Patients with unipolar MDE at intake (nā€‰=ā€‰536) were divided into those with and those without current comorbid overtly expressed irritability/anger. EXPOSURE In this observational, longitudinal study, patients received treatment that was recorded but not controlled. MAIN OUTCOMES AND MEASURES Groups were compared on illness severity and chronicity, psychosocial impairment, quality of life, suicidal behavior, lifetime comorbid diagnoses, impulse control, and measures associated with bipolarity. RESULTS Overt irritability/anger was present in 292 of 536 participants with a unipolar MDE at study intake (54.5%). It was associated with significantly increased depressive severity, longer duration of the index MDE, poorer impulse control, a more chronic and severe long-term course of illness, higher rates of lifetime comorbid substance abuse and anxiety disorder, more antisocial personality disorders, greater psychosocial impairment before intake and during follow-up, reduced life satisfaction, and a higher rate of bipolar II disorder in relatives. No association was found with increased suicidal ideation or behavior. Results were not explained by comorbidity or other manic spectrum symptoms. CONCLUSIONS AND RELEVANCE This study extends results of cross-sectional investigations and indicates that irritability/anger during MDEs is a highly prevalent clinical marker of a more severe, chronic, and complex depressive illness. Findings have important implications for assessment and treatment.

Concepts: Epidemiology, Mental disorder, Bipolar disorder, Major depressive disorder, Major depressive episode, Depression, Antisocial personality disorder, Suicide

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Daylight savings time transitions affect approximately 1.6 billion people worldwide. Prior studies have documented associations between daylight savings time transitions and adverse health outcomes, but it remains unknown whether they also cause an increase in the incidence rate of depressive episodes. This seems likely because daylight savings time transitions affect circadian rhythms, which are implicated in the etiology of depressive disorder. Therefore, we investigated the effects of daylight savings time transitions on the incidence rate of unipolar depressive episodes.

Concepts: Major depressive disorder, Major depressive episode, Seasonal affective disorder, Daylight saving time

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Despite the wealth of literature on social determinants of mental health, less is known about the intersection of these determinants. Using a nationally representative sample, this study aimed to study separate, additive, and multiplicative effects of race, gender, and SES on the risk of major depressive episode (MDE) among American adults.

Concepts: Sociology, Major depressive disorder, Major depressive episode, Dysthymia