Lifetime History Of Depression Research Articles

Different heart rate variability profile during sleep in mid-later life adults with remitted early-onset versus late-onset depression

BackgroundIn mid-later life adults, early-onset and late-onset (i.e., onset ≥50 years) depression appear to be underpinned by different pathophysiology yet have not been examined in relation to autonomic function. Sleep provides an opportunity to examine the autonomic nervous system as the physiology changes across the night. Hence, we aimed to explore if autonomic profile is altered in mid-later life adults with remitted early-onset, late-onset and no history of lifetime depression. MethodsParticipants aged 50–90 years (n = 188) from a specialised clinic underwent a comprehensive clinical assessment and completed an overnight polysomnography study. General Linear Models were used to examine the heart rate variability differences among the three groups for four distinct sleep stages and the wake after sleep onset. All analyses controlled for potential confounders – age, sex, current depressive symptoms and antidepressant usage. ResultsFor the wake after sleep onset, mid-later life adults with remitted early-onset depression had reduced standard deviation of Normal to Normal intervals (SDNN; p = .014, d = −0.64) and Shannon Entropy (p = .004, d = −0.46,) than those with no history of lifetime depression. Further, the late-onset group showed a reduction in high-frequency heart rate variability (HFn.u.) during non-rapid eye movement sleep stage 2 (N2; p = .005, d = −0.53) and non-rapid eye movement sleep stage 3 (N3; p = .009, d = −0.55) when compared to those with no lifetime history. LimitationsCausality between heart rate variability and depression cannot be derived in this cross-sectional study. Longitudinal studies are needed to examine the effects remitted depressive episodes on autonomic function. ConclusionThe findings suggest differential autonomic profile for remitted early-onset and late-onset mid-later life adults during sleep stages and wake periods. The differences could potentially serve as peripheral biomarkers in conjunction with more disease-specific markers of depression to improve diagnosis and prognosis.

Lifetime history of major depressive disorder is associated with decreased reward learning: Evidence from a novel online version of the probabilistic reward task

BackgroundThe Probabilistic Reward Task (PRT) is a signal detection task that assesses reward learning. In laboratory versions of the task, individuals with current or past major depressive disorder (MDD) were characterized by reduced response bias towards a more frequently rewarded stimuli, compared to controls. Our main goal was to develop and validate a novel online version of the PRT, and, in exploratory analyses, evaluate whether lifetime history of depression was associated with blunted reward learning. Methods429 participants recruited via CloudResearch completed questionnaires assessing psychiatric history and an online PRT featuring visually appealing stimuli. 108 participants reported either current or past diagnosis of MDD (lifetime MDD group), and were compared to 321 without lifetime MDD. ResultsParticipants showed overall increase in response bias, validating the online PRT. Females with lifetime MDD (N = 43), compared to females without prior history of MDD (N = 173), exhibited blunted response bias towards the more frequently rewarded stimulus (i.e., reduced reward learning). LimitationsParticipants did not undergo a structured clinical interview, thus we cannot confirm whether they met full diagnostic criteria for depression. ConclusionsThe online PRT yielded similar psychometric properties as laboratory versions of the task. In exploratory analyses, females with lifetime MDD showed a lower propensity to modulate behavior as a function of rewards, which might contribute to heightened vulnerability for developing MDD in females. Future studies should consider social, cultural, and neurobiological factors contributing to sex differences in reward responsiveness and how factors may relate to disease prognosis and treatment outcomes.

Partitioning the Composition of Adverse Childhood Experiences From Accumulated Adversity: Cross-Sectional Evidence From 2 U.S. Samples

Introduction: Adverse childhood experiences (ACEs) are linked to adult morbidity and mortality. However, it is unknown whether the patterning of adverse childhood experiences (ACEs), individually and in combination, confer health risk distinct from a cumulative adversity score. This study evaluates whether individual and comorbid ACE exposures within a cumulative risk score are equally associated with current smoking and lifetime history of depression. Methods: Cross-sectional analysis of ACE assessments in the Behavioral Risk Factor Surveillance System from 21 states in 2019 (n=115,183) and 23 states in 2020 (n=120,416). We modeled cumulative ACE scores and the 5 most common distinct ACE components that comprise a given ACE score, up to a cumulative score of 4. We compared ACE components, adjusted for covariates. Results: Across both samples 23% and 57-58% of persons reported 1 ACE or 2 or more ACEs, respectively. In 2019 smoking prevalence was 10.4% for persons reporting zero ACEs and 14.2% for persons reporting one ACE. When the single ACE was experiencing parental divorce, smoking was higher (16.6%) compared to when the single ACE was verbal abuse (11.8%) or living with a mentally ill household member (9.5%). Lifetime depression prevalence was 9.6% and 14.1% across zero and 1 ACE, respectively, whereas it was 26.6% if the single ACE was living with a mentally ill household member and 11.0% when the ACE was experiencing parental divorce. This heterogeneity was replicated in 2020 data. Additional heterogeneity was observed for higher cumulative ACE scores. Conclusions: Cumulative ACE scores mask substantial health risk heterogeneity which can be delineated by examining distinct components of cumulative ACE scores.

Differential Heart Rate Variability Profiles During Sleep in Older Adults with Remitted Early‐onset versus Late‐onset Depression

AbstractBackgroundSleep is a physiological state involving a dynamic autonomic profile that is ideal for detecting subtle changes in autonomic nervous system functioning. The current study sought to determine if heart rate variability (HRV) during different periods of sleep is impaired in older adults with early‐onset (EOD), late‐onset (LOD), and no history of lifetime depression (NOD).MethodA total of 188 older adults aged 50‐90 years were recruited from the Healthy Brain Ageing clinic at the Brain and Mind Centre, University of Sydney. This samples comprised 49 participants with EOD, 37 with LOD, and 102 with NOD. Each participant underwent medical, psychiatric and neuropsychological assessments, as well as overnight polysomnography.ResultFindings show that for HRV during wake‐after‐sleep‐onset (WASO), only older adults with remitted EOD have significantly lower SDNN and Shannon Entropy, two HRV indices of interest, in comparison to the NOD group, suggesting that those with EOD have diminished overall autonomic function and cardiac complexity respectively. By contrast, older adults with remitted LOD have significantly lower parasympathetic activities during deeper sleep stages (i.e. N2 and N3), as evidenced by a reduction in high‐frequency HRV relative to the EOD group. Overall, our findings suggest that the EOD and LOD phenotypes have differential heart rate profiles during sleep.ConclusionA history of depression, in particular whether this history is early‐ or late‐ onset, is associated with the integrity of autonomic functioning during both wakefulness and sleep in older adults. HRV may have potential as a biomarker of depression and could complement other biomarkers to enhance diagnostic accuracy and prognostic monitoring. As older adults with early‐life depression seem to experience more pronounced autonomic dysfunction, this further emphasizes the need for early and effective interventions, as well as proactive preventative strategies for those with remitted major depressive disorder.

Women with depression in pregnancy or a history of depression have decreased quality of mentalization in the speech to their infants.

Our study aims to understand whether depression, either in pregnancy or lifetime, affects cognitive biases (comprising the attentional focus and affective state) and mentalizing features (ability to understand children's internal mental states, thereby detecting and comprehending their behavior and intention), in maternal speech during mother-infant interaction in the first postnatal year. We recruited 115 pregnant women (44 healthy, 46 with major depressive disorder [MDD] in pregnancy, and 25 with a history of MDD but healthy pregnancy) at 25 weeks' gestation. Three-minute videos were recorded at 8 weeks and 12 months postnatally for each dyad. Maternal speech was transcribed verbatim and coded for cognitive biases and mentalizing comments using the Parental Cognitive Attributions and Mentalization Scale (PCAMs). Women suffering from antenatal depression showed a decreased proportion of mentalizing comments compared with healthy women, at both 8 weeks (0.03 ± 0.01 vs. 0.07 ± 0.01, P = 0.002) and 12 months (0.02 ± 0.01 vs. 0.04 ± 0.01, P = 0.043). Moreover, compared with healthy women, both those with antenatal depression and those with a history of depression showed decreased positive affection in speech (0.13 ± 0.01 vs. 0.07 ± 0.01 and 0.08 ± 0.02, respectively P = 0.003 and P = 0.043), and made significantly fewer comments focused on their infants' experience at 8 weeks (0.67 ± 0.03 vs. 0.53 ± 0.04 and 0.49 ± 0.05, respectively P = 0.015 and P = 0.005). In linear regression models women's socioeconomic difficulties and anxiety in pregnancy contribute to these associations, while postnatal depression did not. Both antenatal depression and a lifetime history of depression are associated with a decreased quality of women's speech to their infants, as shown by less focus on their infant's experience, decreased positive affection, and less able to mentalize. Examining maternal speech to their infants in the early postnatal months may be particularly relevant to identify women who could benefit from strategies addressing these aspects of the interactive behavior and thus improve infant outcome in the context of depression.

Affective working memory in depression.

Depressed individuals show a wide range of difficulties in executive functioning (including working memory), which can be a significant burden on everyday mental processes. Theoretical models of depression have proposed these difficulties to be especially pronounced in affective contexts. However, evidence investigating affective working memory (WM) capacity in depressed individuals has shown mixed results. The preregistered study used a complex span task, which has been shown to be sensitive to difficulties with WM capacity in affective relative to neutral contexts in other clinical groups, to explore affective WM capacity in clinical depression. Affective WM capacity was compared between individuals with current depression (n = 24), individuals in remission from depression (n = 25), and healthy controls (n = 30). The results showed that, overall, WM capacity was more impaired in the context of negative distractor images, relative to neutral images. Furthermore, those with a lifetime history of depression (individuals with current depression and individuals remitted from depression), performed worse on the task, compared to healthy controls. However, there was no support for the greater disruption of WM capacity in affective compared to neutral contexts in those with a lifetime history of depression. These findings' implications for current models of depression are discussed. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Neuroinflammation in the Amygdala Is Associated With Recent Depressive Symptoms

Converging evidence suggests that elevated inflammation may contribute to depression. Yet, the link between peripheral and neuro-inflammation in depression is unclear. Here using data from the UK Biobank, we estimated associations among depression, C-reactive protein as a measure of peripheral inflammation (CRP), and neuroinflammation as indexed by diffusion-basis spectral imaging-based restricted fraction (DBSI-RF). DBSI-RF was derived from diffusion-weighted imaging data (n=11,512) for whole-brain gray matter (global-RF), and regions of interest in bilateral amygdala (amygdala-RF) and hippocampus (hippocampus-RF), and CRP was estimated from blood (serum) samples. Self-reported recent depression symptoms were measured using a 4-item assessment. Linear regressions were used to estimate associations between CRP and DBSI-RFs with depression, while adjusting for the following covariates: Age, sex, body mass index, smoking, drinking, and medical conditions. Elevated CRP was associated with higher depression symptoms (β=0.04, pfdr<0.005) and reduced global-RF (β=-0.03, pfdr<0.001). Higher amygdala-RF was associated with elevated depression - an effect resilient to added covariates and CRP (β=0.02, pfdr<0.05). Interestingly, this association was stronger in individuals with a lifetime history of depression (t β=0.07, p<0.005) than in those without (β=0.03, p<0.05). Associations between global-RF or hippocampus-RF with depression were not significant, and no DBSI-RF indices indirectly linked CRP with depression (i.e., mediation effect). Peripheral inflammation and DBSI-RF neuroinflammation in the amygdala are independently associated with depression, consistent with animal studies suggesting distinct pathways of peripheral and neuro-inflammation in the pathophysiology of depression, and with investigations highlighting the role of the amygdala in stress-induced inflammation and depression.

Reducing default mode network connectivity with mindfulness-based fMRI neurofeedback: a pilot study among adolescents with affective disorder history

Adolescents experience alarmingly high rates of major depressive disorder (MDD), however, gold-standard treatments are only effective for ~50% of youth. Accordingly, there is a critical need to develop novel interventions, particularly ones that target neural mechanisms believed to potentiate depressive symptoms. Directly addressing this gap, we developed mindfulness-based fMRI neurofeedback (mbNF) for adolescents that aims to reduce default mode network (DMN) hyperconnectivity, which has been implicated in the onset and maintenance of MDD. In this proof-of-concept study, adolescents (n = 9) with a lifetime history of depression and/or anxiety were administered clinical interviews and self-report questionnaires, and each participant’s DMN and central executive network (CEN) were personalized using a resting state fMRI localizer. After the localizer scan, adolescents completed a brief mindfulness training followed by a mbNF session in the scanner wherein they were instructed to volitionally reduce DMN relative to CEN activation by practicing mindfulness meditation. Several promising findings emerged. First, mbNF successfully engaged the target brain state during neurofeedback; participants spent more time in the target state with DMN activation lower than CEN activation. Second, in each of the nine adolescents, mbNF led to significantly reduced within-DMN connectivity, which correlated with post-mbNF increases in state mindfulness. Last, a reduction of within-DMN connectivity mediated the association between better mbNF performance and increased state mindfulness. These findings demonstrate that personalized mbNF can effectively and non-invasively modulate the intrinsic networks associated with the emergence and persistence of depressive symptoms during adolescence.

Mental health of working parents during the COVID-19 pandemic: can resilience buffer the impact of psychosocial work stress on depressive symptoms?

BackgroundThe COVID-19 pandemic has confronted working parents with an accumulation of stressors regarding changes in work, family, and social life, putting their mental health at risk. Stressors include altered working conditions such as working from home or changes in working hours as well as the difficulty to reconcile work and childcare due to the closure of childcare facilities. The present study examined the relationship of psychosocial work stress (i.e., work-privacy conflict and effort-reward imbalance at work) and depressive symptoms in working parents and whether this association was moderated by individual resilience.MethodsData of the present study (n = 452) were collected in Germany between May and June 2020 as part of the DREAMCORONA study. A subsample of working mothers (n = 191) and fathers (n = 261) completed the subscale for work-privacy conflict (WPC) of the Copenhagen Psychosocial Questionnaire, the Effort-Reward Imbalance (ERI) Questionnaire, the Connor-Davidson Resilience Scale (CD-RISC), and the Edinburgh Postnatal Depression Scale (EPDS). Multiple linear regression analyses including moderation were performed, controlling for gender, working hours per week, and a lifetime history of depression as potential confounders.ResultsBoth WPC (β = 0.336, p < .001) and ERI (β = 0.254, p < .001) were significantly associated with depressive symptoms. Resilience moderated the relationship between ERI and depressive symptoms (β = − 0.101, p = .018), indicating that higher resilience weakened the relationship. However, this effect was not found regarding the relationship between WPC and depressive symptoms (β = 0.055, p = .167).ConclusionsThe results highlight the need for measures to reduce psychosocial work stressors such as WPC and ERI during the COVID-19 pandemic on the one hand and to promote resilience on the other hand. The findings partially support the potential protective role of resilience buffering the association between psychosocial stress and mental health in working parents. Longitudinal studies are needed to confirm this effect.

The neurocognitive implications of depression and socioeconomic status in people with HIV

ABSTRACT Objective This cross-sectional study investigates the independent and interactive effects of depression and socioeconomic status (SES) on neurocognition in a diverse sample of people with HIV (PWH). Method The sample of 119 PWH (71% Latinx, 27% female) completed comprehensive neurocognitive and psychosocial evaluations and were separated into two groups: those with a history of depression diagnosis (n = 47) and those without (n = 72). Results The results of regression analyses indicated that lifetime depression was not associated with lower SES nor with worse neurocognitive performance on any neurocognitive outcome. However, a significant main effect of SES was observed on the Hopkins Verbal Learning Test (total), indicating that higher SES was associated with better verbal learning performance (B= .11, SE = .05, p< .02). Lastly, the results revealed an interactive effect of lifetime depression and SES, such that individuals with depression and higher SES performed better on tests of attention/working memory (i.e., WAIS-III Letter-Number Sequencing, B= .08, SE = .04, p< .02; Paced Auditory Serial Addition Test, B= .39, SE = .16, p< .02). Conclusions Depression and SES appear to play an important role in the neurocognitive performance of PWH. Specifically, higher SES appears to have a protective effect on attention/working memory among PWH only if they have co-morbid history of lifetime depression.

Accelerated mononuclear cell telomere attrition in breast cancer survivors with depression history: A 2-year longitudinal cohort study.

Cancer treatments are thought to accelerate biological aging, although this trajectory is highly variable. Depression is more prevalent in breast cancer survivors and is thought to be a vulnerability factor for biological aging. A lifetime history of depression and cumulative lifetime number of depression episodes could hypothetically be associated with an accelerated rate of biological aging as indexed by attrition of telomere length in a prospective cohort of breast cancer survivors who were not currently depressed. Breast cancer survivors (n=206) without current depression were recruited from a large community-based health plan and were assessed for depression history by a structured diagnostic interview. Blood specimens were provided at baseline and every 8 months over 24 months to measure peripheral blood mononuclear cell (PBMC) telomere length. Mixed linear models examined associations of depression history and number of depression episodes with change in telomere length, adjusting for demographic, comorbidity, and cancer-specific factors. In the fully adjusted model, depression history predicted attrition of PBMC telomere length over 24 months (Beta [SE]=-.006 [.002], p=.001). Greater number of depressive episodes over the lifetime was also associated with accelerated attrition of PBMC telomere length over 24 months (Beta [SE]=-.004 [.001], p=.001). In breast cancer survivors without current depression, telomere attrition over 24 months was greatest in those with a lifetime depression history, particularly those with the greatest number of episodes of major depressive disorder over their lifetime. Depression history and its cumulative burden may contribute to accelerated biological aging, with implications for risk of morbidity and mortality in breast cancer survivors.

Relationship between a Self-Reported History of Depression and Persistent Elevation in C-Reactive Protein after Myocardial Infarction.

Background: Elevated levels of C-reactive protein (CRP) are associated with both an increased risk of cardiovascular disease (CVD) and depression. We aimed to test the hypothesis that a self-report history of depression is associated with a smaller decrease in CRP levels from hospital admission to 3-month follow-up in patients with acute myocardial infarction (MI). Methods: We assessed 183 patients (median age 59 years; 84% men) with verified MI for a self-report history of lifetime depression and plasma CRP levels within 48 h of an acute coronary intervention and again for CRP levels at three months. CRP values were categorized according to their potential to predict CVD risk at hospital admission (acute inflammatory response: 0 to <5 mg/L, 5 to <10 mg/L, 10 to <20 mg/L, and ≥20 mg/L) and at 3 months (low-grade inflammation: 0 to <1 mg/L, 1 to <3 mg/L, and ≥3 mg/L). Additionally, in a subsample of 84 patients showing admission CRP levels below 20 mg/L, changes in continuous CRP values over time were also analyzed. Results: After adjustment for a range of potentially important covariates, depression history showed a significant association with a smaller decrease in both CRP risk categories (r = 0.261, p < 0.001) and log CRP levels (r = 0.340, p = 0.005) over time. Conclusions: Self-reported history of depression may be associated with persistently elevated systemic inflammation three months after MI. This finding warrants studies to test whether lowering of inflammation in patients with an acute MI and a history of depression may improve prognosis.

Association between depressive symptoms and long-term heart rate variability in older women: Findings from a population-based cohort

IntroductionCross-sectional studies highlighted changes in autonomic nervous system (ANS) activity in geriatric depression. However, few longitudinal studies assessed this link which remains still debated. We examined the longitudinal association between lifetime depression history, current depressive disorders, and the evolution of ANS activity in older community women. MethodsThe present data stemmed from the PROOF study, a population-based cohort of 1011 community-dwellers followed-up at 2-year intervals for 10 years. Only data from female participants was analyzed (n = 508, mean age 68.5 ± 0.88 years), as very few men had depression in our population. Depressive symptoms and depression history were collected at baseline. Participants were classified in four groups according to presence or absence of history of depression (HD) or current depressive symptomatology (CD): HD+/CD+, HD−/CD+, HD+/CD− and HD−/CD−. ANS activity was assessed during the follow-up through 24-h heart rate variability (HRV). Longitudinal associations between depressive status and HRV indices during the follow-up were investigated using multivariate linear mixed models. ResultsCompared to HD−/CD− group, women belonging to HD−/CD+ group had greater baseline parasympathetic tone, as measured by lower LF index and LF/HF balance. The longitudinal analysis exhibited a significant enhancement of LF/HF balance with time, measuring an increase of sympathetic tone in HD−/CD+ group. ConclusionOur findings suggest that late-onset depressive symptoms may be associated with subsequent autonomic dysregulation in older women. These results highlight the importance of detecting and managing depressive symptoms to limit their consequences on ANS functioning, and the risk of cardiovascular events.

Depressive symptoms and neuroticism-related traits are the main factors associated with wellbeing independent of the history of lifetime depression in the UK Biobank.

Wellbeing has a fundamental role in determining life expectancy and major depressive disorder (MDD) is one of the main modulating factors of wellbeing. This study evaluated the modulators of wellbeing in individuals with lifetime recurrent MDD (RMDD), single-episode MDD (SMDD) and no MDD in the UK Biobank. Scores of happiness, meaningful life and satisfaction about functioning were condensed in a functioning-wellbeing score (FWS). We evaluated depression and anxiety characteristics, neuroticism-related traits, physical diseases, lifestyle and polygenic risk scores (PRSs) of psychiatric disorders. Other than individual predictors, we estimated the cumulative contribution to FWS of each group of predictors. We tested the indirect role of neuroticism on FWS through the modulation of depression manifestations using a mediation analysis. We identified 47 966, 21 117 and 207 423 individuals with lifetime RMDD, SMDD and no MDD, respectively. Depression symptoms and personality showed the largest impact on FWS (variance explained ~20%), particularly self-harm, worthlessness feelings during the worst depression, chronic depression, loneliness and neuroticism. Personality played a stronger role in SMDD. Anxiety characteristics showed a higher effect in SMDD and no MDD groups. Neuroticism played indirect effects through specific depressive symptoms that modulated FWS. Physical diseases and lifestyle explained only 4-5% of FWS variance. The PRS of MDD showed the largest effect on FWS compared to other PRSs. This was the first study to comprehensively evaluate the predictors of wellbeing in relation to the history of MDD. The identified variables are important to identify individuals at risk and promote wellbeing.

Generalized anxiety disorder among adults with attention deficit hyperactivity disorder

BackgroundResearch has identified a link between Attention-Deficit Hyperactivity Disorder (ADHD) and Generalized Anxiety Disorder (GAD). The aims of this study were to investigate the relationship between ADHD and GAD, and to identify significant correlates of GAD among those with ADHD. MethodsData were derived from the nationally representative 2012 Canadian Community Health Survey—Mental Health. The sample included 6,989 respondents aged 20–39, of whom 682 had GAD. Bivariate and logistic regression analyses were conducted to determine the degree to which the association between ADHD and GAD was attenuated by demographics, socioeconomic status, social support, spirituality, childhood adversities, depression, and substance abuse/dependence. Additional analyses were conducted using the subsample of those diagnosed with ADHD (n = 272) to determine factors associated with GAD. Results1 in 9 respondents with GAD had ADHD, in comparison to 1 in 33 of those without GAD. The age-sex-race adjusted odds of GAD were four-fold for those with ADHD in comparison to those without ADHD. After adjusting for all covariates, the odds of GAD were still more than double for those with ADHD. Factors associated with GAD among those with ADHD include being female, having an income <$40,000, having fewer close relationships, and having a lifetime history of depression. LimitationsCross-sectional design prohibits causal inferences. ConclusionThe high co-morbidity between ADHD and GAD emphasizes the need for targeted intervention to support these often overlapping disorders.

Incident Major Depressive Disorder Predicted by Three Measures of Insulin Resistance: A Dutch Cohort Study.

Major depressive disorder is the leading cause of disability worldwide. Yet, there remain significant challenges in predicting new cases of major depression and devising strategies to prevent the disorder. An important first step in this process is identifying risk factors for the incidence of major depression. There is accumulating biological evidence linking insulin resistance, another highly prevalent condition, and depressive disorders. The objectives of this study were to examine whether three surrogate measures of insulin resistance (high triglyceride-HDL [high-density lipoprotein] ratio; prediabetes, as indicated by fasting plasma glucose level; and high central adiposity, as measured by waist circumference) at the time of study enrollment were associated with an increased rate of incident major depressive disorder over a 9-year follow-up period and to assess whether the new onset of these surrogate measures during the first 2 years after study enrollment was predictive of incident major depressive disorder during the subsequent follow-up period. The Netherlands Study of Depression and Anxiety (NESDA) is a multisite longitudinal study of the course and consequences of depressive and anxiety disorders in adults. The study population comprised 601 NESDA participants (18-65 years old) without a lifetime history of depression or anxiety disorders. The study's outcome was incident major depressive disorder, defined using DSM-IV criteria. Exposure measures included triglyceride-HDL ratio, fasting plasma glucose level, and waist circumference. Fourteen percent of the sample developed major depressive disorder during follow-up. Cox proportional hazards models indicated that higher triglyceride-HDL ratio was positively associated with an increased risk for incident major depression (hazard ratio=1.89, 95% CI=1.15, 3.11), as were higher fasting plasma glucose levels (hazard ratio=1.37, 95% CI=1.05, 1.77) and higher waist circumference (hazard ratio=1.11 95% CI=1.01, 1.21). The development of prediabetes in the 2-year period after study enrollment was positively associated with incident major depressive disorder (hazard ratio=2.66, 95% CI=1.13, 6.27). The development of high triglyceride-HDL ratio and high central adiposity (cut-point ≥100 cm) in the same period was not associated with incident major depression. Three surrogate measures of insulin resistance positively predicted incident major depressive disorder in a 9-year follow-up period among adults with no history of depression or anxiety disorder. In addition, the development of prediabetes between enrollment and the 2-year study visit was positively associated with incident major depressive disorder. These findings may have utility for evaluating the risk for the development of major depression among patients with insulin resistance or metabolic pathology.

Association between lifetime depression history, hippocampal volume and memory in non-amnestic mild cognitive impairment.

Hippocampal subfield volume loss in older adults with amnestic mild cognitive impairment (aMCI) and depression history are associated with amyloid beta and tau pathology, thereby increasing the risk for Alzheimer's disease (AD). However, no studies have exclusively examined distinct alterations in hippocampal subfields in non-amnestic MCI (naMCI) in relation to depression history. Here, we used both longitudinal and transverse hippocampal segmentation methods using the automated FreeSurfer software to examine whether a lifetime depression history is associated with differences in hippocampal head/body/tail (H/B/T) and key subfield volumes (CA1, subiculum, dentate gyrus) in older adults with naMCI. Further, we explored whether differences in hippocampal H/B/T and subfield volumes were associated with structured and unstructured verbal encoding and retention, comparing those with and without a depression history. The naMCI with a depression history group demonstrated larger or relatively preserved right CA1 volumes, which were associated with better unstructured verbal encoding and as well as structured verbal memory retention. This association between memory encoding and hippocampal CA1 and total head volume was significantly different to those with no depression history. The relationship between right CA1 volume and memory retention was also moderated by depression history status F (5,143)=7.84, p<0.001, R2 =0.22. Those participants taking antidepressants had significantly larger hippocampal subiculum (p=0.008), and right hippocampal body (p=0.004) and better performance on structured encoding (p=0.011) and unstructured memory retention (p=0.009). These findings highlight the importance of lifetime depression history and antidepressant use on the hippocampus and encoding and memory retention in naMCI.

The impact of a single session of aerobic exercise on positive emotional reactivity in depression: Insight into individual differences from the late positive potential

Depression has been characterized by a broad disengagement from the environment, as reflected by dampened positive and negative emotional reactivity. Research has shown that acute exercise may enhance positive emotional reactivity in healthy adults. It is unknown whether it can alter positive emotional reactivity in depression. In the present study, positive emotional reactivity was assessed using the late positive potential (LPP) event-related potential before and after 30 min of moderate-intensity aerobic exercise in 43 adults with current or a lifetime history of depression (Mage = 32.74 years; Min/Max = 18/59) and 18 never-depressed healthy adults (Mage = 37.94 years; Min/Max = 21/61). Acute exercise increased the LPP for healthy adults; the LPP did not change among those with current or a lifetime history of depression. A secondary aim was to identify moderators of change in positive emotional reactivity among subgroups of adults with current depression. Compared to adults with impaired mood reactivity, those with intact mood reactivity had a pre-to-post increase in the LPP. The current study provides preliminary support for the LPP as a neural indicator of exercise efficacy and highlights individual differences in response to acute exercise in depression.

Factors associated with multiple suicide attempts in a nationally representative study of U.S. military veterans

ObjectiveVeterans with a history of multiple suicide attempts are at increased risk for suicide mortality relative to those with a single attempt. However, little is known about factors that differentiate veterans who attempt suicide once compared to more than once. This study examined factors that distinguish single suicide attempters (SSA) from multiple suicide attempters (MSA) in a nationally representative sample of U.S. military veterans. MethodsData were analyzed from the 2019–2020 National Health and Resilience in Veterans Study, which surveyed a representative sample of 4069 U.S. veterans. Analyses: (a) estimated the lifetime prevalence of SSA and MSA; and (b) examined factors that differentiated veterans with a SSA from MSA. ResultsThe lifetime prevalences of SSA and MSA were 1.9% and 2.0%. The strongest correlates of MSA were history of lifetime depression (odds ratio [OR], 2.45; 95% confidence interval [CI], 1.43–8.35), non-suicidal self-injury (OR, 3.28; 95% CI, 1.27–8.45), drug use disorder (OR, 4.0; 95% CI, 1.67–9.54), and marital status (OR, 0.40, 95% CI, 0.18-0.87), which accounted for 15.5%–41.4% of the total explained variance in MSA. DiscussionHalf of military veterans who have attempted suicide in the United States report more than one attempt, suggesting that suicide attempts are not a one-time occurrence for a substantial proportion of veterans. Veterans who attempt suicide more than once show more deliberate self-harm behavior and have greater psychiatric comorbidities relative to single attempters. Implications for future research examining risk factors for suicide attempts among veterans are discussed.

Association between household overcrowding and depressive mood among Chinese residents

Background: Recent household overcrowding has strongly affected households’ mental health in China. The possible association of household overcrowding and depressive mood is not fully demonstrated in unique Chinese economic context. Objectives: The aim of this study was to examine the association of household overcrowding and depressive mood among Chinese adults and to evaluate whether the association varies across socio-demographic characteristics. Methods: The relationship between household overcrowding and individual's depressive mood was examined using ordered logistic regression models. Stratified analysis was used to evaluate whether the association varies across socio-demographic characteristics. Results: Ordered logistic regression models showed that the odds ratio for depressive mood among residents enduring housing overcrowding, as compared with residents without household overcrowding were 1.12 (95% confidence interval [CI]: 1.02–1.22), after controlling for important confounders. We secondarily examined the association across subgroups. Stratified analysis revealed that household overcrowding significantly affected depressive mood for the low household income subgroups, whereas has no significant effect on depressive mood for the high household income. Limitations: CFPS does not investigate the depression of people under 16, making it impossible for us to study the impacts of housing crowding on Chinese children's depression. Secondly, we did not adjust for other potential confounders, such as lifetime history of depression or depressive mood, medication use and anxiety disorders/symptoms. Conclusions: This finding indicates that household overcrowding is harmful to residents’ mental health, and appropriate protective measures should be taken to reduce the adverse effects of household overcrowding on residents’ mental health.