Clarifying the causal relationship in women between childhood sexual abuse and lifetime major depression

Impact of adverse childhood experiences on life expectancy with depression in the U.K. population: The mitigating role of educational attainment

BACKGROUND

Adverse childhood experiences (ACEs) are associated with depression in later life.

OBJECTIVE

This study aimed to measure the impact of ACEs on life expectancy with depression (DLE) and to assess how educational attainment affected expectations.

PARTICIPANTS AND SETTING

The study used data on 5597 participants from the English Longitudinal Study of Aging (2006-2013).

METHODS

Depression was assessed through the eight-item short version of the Centre for Epidemiologic Studies Depression. We used discrete-multistate life table models to estimate total life expectancy and life expectancy with depression.

RESULTS

Older adults with ACEs had longer DLE and a higher proportion of remaining life with depression compared with those without ACEs. For example, men aged 60 years with ACEs could expect to live 5.2 (95 % confidence interval (CI): 4.2, 6.2) years with depression compared with 2.8 (95 % CI: 2.3, 3.3) years for men without ACEs. Women aged 60 years who reported ACEs could expect to live 9.4 (95 % CI: 7.6, 11.1) years with depression compared with 6.0 (95 % CI: 5.1, 7.0) years for women without ACEs. With a high level of educational attainment, older adults from younger cohorts with ACEs lived fewer depression years and spent a higher proportion of their life being free of depression than adults with ACEs and had a low level of educational attainment.

CONCLUSION

Our results indicated that ACEs may increase years of life with depression among U.K. adults. Meanwhile, high educational attainment could mitigate the mental health burden associated with ACEs.

Stressful life events increase the risk of major depressive episodes: A population-based twin study

BACKGROUND

Previous studies have found that stressful life events (SLEs) are associated with an increased risk of adult depression. However, many studies are observational in nature and limited by methodological issues, such as potential confounding by genetic factors. Genetically informative research, such as the co-twin control design, can strengthen causal inference in observational studies. Discrete-time survival analysis has several benefits and multilevel survival analysis can incorporate frailty terms (random effects) to estimate the components of the biometric model. In the current study, we investigated associations between SLEs and depression risk in a population-based twin sample (N = 2299).

METHODS

A co-twin control design was used to investigate the influence of the occurrence of SLEs on depression risk. The co-twin control design involves comparing patterns of associations in the full sample and within dizygotic (DZ) and monozygotic twins (MZ). Associations were modelled using discrete-time survival analysis with biometric frailty terms. Data from two time points were used in the analyses. Mean age at Wave 1 was 28 years and mean age at Wave 2 was 38 years.

RESULTS

SLE occurrence was associated with increased depression risk. Co-twin control analyses indicated that this association was at least in part due to the causal influence of SLE exposure on depression risk for event occurrence across all SLEs and for violent SLEs. A minor proportion of the total genetic risk of depression reflected genetic effects related to SLEs.

CONCLUSIONS

The results support previous research in implicating SLEs as important risk factors with probable causal influence on depression risk.

History of childhood mistreatment and the psychological health consequences of COVID-19 for older adults

OBJECTIVES

We examine the associations between childhood mistreatment (emotional abuse, physical abuse, sexual abuse, and emotional neglect) and older adults' changes in depressive symptoms from before to during the COVID-19 pandemic (September 2018-June 2020).

METHODS

Using a community-based sample of older adults in North Florida (N = 581), we used ordinary least-squares regression to estimate associations between childhood mistreatments and depressive symptoms in June 2020, controlling for baseline symptoms and demographic characteristics. Additional models tested whether emotion regulation and social support attenuated associations between childhood mistreatments and depressive symptoms.

RESULTS

Older adults exposed to emotional neglect in childhood saw a greater increase in depressive symptoms than those who did not experience childhood mistreatment. Those reporting childhood physical abuse had higher baseline depressive symptoms, but they did not increase during the pandemic. These associations remained stable after controlling for emotion regulation and social support, coping resources thought to contribute to linkages between childhood mistreatment and psychological health in adulthood.

CONCLUSION

Childhood mistreatment might inform the psychological consequences of major stressors in later life. Thus, early life interventions for children experiencing mistreatment could be especially important for long-term psychological health outcomes and responses to major stressful events. Identifying older people with histories of childhood mistreatment could also help clinicians gauge patients' risk of psychological decline during times such as the COVID-19 pandemic and tailor psychological health interventions.

Effect of childhood maltreatment on cognitive function and its relationship with personality development and social coping style in major depression disorder patients: A latent class model and network analysis

Study objectives

The study aimed to (1) analyze the interrelationships among different types of childhood adversity, diverse personality dimensions, and individual coping style integratively among major depressive disorder (MDD) patients and healthy participants using a network approach; (2) explore the latent class of child maltreatment (CM) and its relationship with cognitive function.

Methods

Data were collected from the Objective Diagnostic Markers and Personalized Intervention in MDD Patients (ODMPIM) study, including 1,629 Chinese participants. Using the Childhood Trauma Questionnaire to assess CM, the Simplified Coping Style Questionnaire to measure individual coping style, Eysenck Personality Questionnaire Revised-Short Form for personality characters, and a series of neurocognitive tests, including seven tests with 18 subtests for cognitive assessments. We used the "Network Module" in Jeffreys's Amazing Statistics Program (JASP) and R package for network analysis. A latent class analysis was performed with SAS9.4.

Results

Child maltreatment was more common in MDD patients than in healthy controls, except for emotional abuse. Network analysis showed that emotional abuse, emotional neglect, physical abuse, and physical neglect formed quadrangle connections. Personality dimensions were associated with physical neglect and emotional abuse. All types of CM (excluding sex abuse) showed an association with coping style. Emotional neglect showed the highest centrality measures. Physical neglect had a high level of closeness. To a concerning strength, emotional and physical neglect showed the highest levels. The structure of the networks is variant between groups (M = 0.28, P = 0.04). Latent class analysis (LCA) revealed that three classes provided the best fit statistics. Neglect and abuse classes tended to perform more poorly on the five cognitive domains.

Conclusion

This study provided insights on multi-type of CM. Neglect played an important role in different routes through the relation between CM with personality traits and social coping style. However, neglect has often been ignored in previous studies and should receive more public attention.

Chronic Diseases, Health Conditions, and Other Impacts Associated With Rape Victimization of U.S. Women

Sexual violence (SV) is an urgent public health issue that is common and has lifelong effects on health. Previous scholarship has documented the association of SV victimization with numerous health conditions and impacts, but much of this past work has focused on negative health outcomes associated with child sexual abuse using non-nationally representative samples. This article used a nationally representative female sample to examine health conditions associated with any lifetime experience of rape. We also examined injury and health outcomes (e.g., fear, injury) resulting from any violence by a perpetrator of rape. About two in five rape victims (39.1%) reported injury (e.g., bruises, vaginal tears), and 12.3% reported a sexually transmitted disease as a result of the rape victimization. Approximately 71.3% of rape victims (an estimated 16.4 million women) experienced some form of impact as a result of violence by a rape perpetrator. Among U.S. women, the adjusted odds of experiencing asthma, irritable bowel syndrome, frequent headaches, chronic pain, difficulty sleeping, activity limitations, poor physical or mental health, and use of special equipment (e.g., wheelchair) were significantly higher for lifetime rape victims compared with non-victims. This article fills gaps in our understanding of health impacts associated with rape of women and is the only nationally representative source of this information to our knowledge. Primary prevention efforts in youth that seek to prevent the first occurrence of rape and other forms of SV may be most effective for reducing the long-term health effects of this violence.

Integrative Review of Early Life Adversity and Cortisol Regulation in Pregnancy

OBJECTIVE

To synthesize published findings on the relationship between early life adversity and hypothalamic-pituitary-adrenal axis cortisol parameters in pregnant women.

DATA SOURCES

We searched PubMed, CINAHL, and PsycINFO databases using variants and combinations of the keywords early life adversity, pregnancy, hypothalamic-pituitary-adrenal axis, and cortisol.

STUDY SELECTION

We selected articles that included pregnant participants, included measures of cortisol and early life adversity, were published in English in a peer-reviewed journal, and were of sufficient methodologic quality. Date of publication was unrestricted through May 2020.

DATA EXTRACTION

Twenty-five articles met the inclusion criteria and were evaluated for quality and risk of bias. Sources of cortisol included saliva, hair, plasma, and amniotic fluid.

DATA SYNTHESIS

We categorized findings according to four physiologically distinct cortisol output parameters: diurnal (daily pattern), phasic (in response to an acute stressor), tonic (baseline level), and pregnancy-related change. Preliminary evidence suggests that early adversity may be associated with elevated cortisol awakening response (diurnal) and blunted response to acute stressors (phasic), irrespective of other psychosocial symptoms or current stress. For women with high levels of current stress or psychological symptoms, early adversity was associated with higher baseline (tonic) cortisol levels.

CONCLUSION

Early life adversity in women is linked with alterations in cortisol regulation that are apparent during pregnancy. Researchers should examine how variations in each cortisol parameter differentially predict pregnancy health risk behaviors, maternal mental health, and neonatal health outcomes.

Psychodynamic and systemic group treatment for women with a history of childhood sexual abuse: five-year follow-up of a randomized controlled trial

Background: Childhood sexual abuse (CSA) is a significant trauma that may have lifelong impact. Due to the long-term negative personal and societal consequences of CSA, it is crucial to find treatments with enduring outcomes. Objective: The aim of this study was to determine the relative long-term efficacy of psychodynamic and systemic group therapy for adult women exposed to CSA. Method: A prospective randomized controlled trial was conducted with outcomes assessed at pre- and post-treatment, and 1 and 5 years post-treatment. All analyses were intention-to-treat. One hundred and six women with sequelae from childhood sexual abuse were treated with psychodynamic or systemic group therapy. Primary outcome was Global Severity Index (GSI) of SCL-90-R. Secondary outcomes included symptoms of PTSD and depression and psycho-social functioning. Results: Treatment was completed by 81% of participants; 64% completed the 1-year follow-up and 60% completed the 5-year follow-up. Completion rates did not differ between treatments. Significant reduction in symptoms measured on GSI and improvement of psychosocial functioning was found for both interventions at all measurement points after treatment (ES range = 0.68-1.19). However, different trajectories were observed: while outcome at end of treatment was significantly better in the systemic group, no differences in gains were observed at the 1- and 5-year follow-ups when controlling for baseline differences. Conclusions: The findings add to the evidence base for psychodynamic and systemic group therapy, but the result also underscores the importance of taking post-treatment trajectories into account in evidence-based research, in the continued efforts to improve treatment for this population.

The Impact of Different Types of Abuse on Depression

Despite a large amount of research on depression and abuse, there is still a controversy on how abuse is measured and on childhood trauma's effect on the physiological function of adults. Here, we attempt to clarify the relationship between different types of abuse and depression while focusing on childhood abuse. This article, unlike prior research, provides an overview that addresses physical, psychological, and sexual abuse and their psychological impact on the victims. Results show that abuse is a vulnerability factor for a variety of mental and physical health problems and that psychological abuse is strongly associated with depression. More research is needed to understand (a) the role of abuse in the development and maintenance of depression and, in particular, longitudinal studies that also account for the large number of risk and protective factors that influence this relationship and (b) how different types of abuse can influence response to treatment among survivors with depression, in order to provide effective trauma-focused approaches to manage depressive symptoms.

Childhood Adversity and Psychosocial Health Outcomes in Later Life Among Immigrants in Canada

Childhood adversity is known to have an enduring effect on health outcomes of victims. The objective of the study was to examine the association between childhood adversity and psychosocial health outcomes among immigrants in Canada. Using descriptive and inferential statistics and fitting negative loglog regression models to the 2014 General Social Survey, the paper examined the relationship between experience of childhood adversity (i.e. physical and sexual abuse before age 15) and its association with psychosocial health outcomes (i.e. psychological-mental condition and self-rated mental health) among immigrants in Canada. After accounting for relevant socioeconomic and demographic factors, the results show that physical abuse during childhood resulted in 29% and 31% increased likelihood of having a psychological mental condition and poor self-rated mental health, respectively. Also, sexual abuse during childhood was associated with 28% increased likelihood of poor self-rated mental health. In conclusion, the findings show that experience of physical and sexual abuse during childhood is associated with negative mental health outcomes in later life.

Trauma-Informed Care Education in Baccalaureate Nursing Curricula in the United States: Applying the American Association of Colleges of Nursing Essentials

The practice of trauma-informed care (TIC) allows nurses in any setting to identify and intervene with traumatized individuals and to create a continuum of care when forensic nursing services are needed. The purpose of this article is to suggest ways to incorporate TIC content into baccalaureate nursing programs. We begin with an overview of baccalaureate nursing curricula and common types of traumatic experience important for students to understand. We then propose specific strategies for inclusion of TIC content in baccalaureate nursing education, using the American Association of Colleges of Nursing Essentials of Baccalaureate Education for Professional Nursing Practice. With a solid foundation in TIC, baccalaureate-prepared nursing students can provide effective patient care and better support forensic nursing practice. This will increase the capacity of the nursing profession in general to meet the needs of those affected by trauma, violence, and abuse.

Adolescent Victimization and Early-Adult Psychopathology: Approaching Causal Inference Using a Longitudinal Twin Study to Rule Out Noncausal Explanations

Adolescence is the peak age for both victimization and mental disorder onset. Previous research has reported associations between victimization exposure and many psychiatric conditions. However, causality remains controversial. Within the Environmental Risk Longitudinal Twin Study, we tested whether seven types of adolescent victimization increased risk of multiple psychiatric conditions and approached causal inference by systematically ruling out noncausal explanations. Longitudinal within-individual analyses showed that victimization was followed by increased mental health problems over a childhood baseline of emotional/behavioral problems. Discordant-twin analyses showed that victimization increased risk of mental health problems independent of family background and genetic risk. Both childhood and adolescent victimization made unique contributions to risk. Victimization predicted heightened generalized liability (the “p factor”) to multiple psychiatric spectra, including internalizing, externalizing, and thought disorders. Results recommend violence reduction and identification and treatment of adolescent victims to reduce psychiatric burden.

Childhood trauma and dimensions of depression: a specific association with the cognitive domain

Objective:

To investigate associations between a history of childhood trauma and dimensions of depression in a sample of clinically depressed patients.

Methods:

A sample of 217 patients from a mood-disorder outpatient unit was investigated with the Beck Depression Inventory, the Hamilton Depression Rating Scale, the CORE Assessment of Psychomotor Change, and the Childhood Trauma Questionnaire. A previous latent model identifying six depressive dimensions was used for analysis. Path analysis and Multiple Indicators Multiple Causes (MIMIC) models were used to investigate associations between general childhood trauma and childhood maltreatment modalities (emotional, sexual, and physical abuse; emotional and physical neglect) with dimensions of depression (sexual, cognition, insomnia, appetite, non-interactiveness/retardation, and agitation).

Results:

The overall childhood trauma index was uniquely associated with cognitive aspects of depression, but not with any other depressive dimension. An investigation of childhood maltreatment modalities revealed that emotional abuse was consistently associated with depression severity in the cognitive dimension.

Conclusion:

Childhood trauma, and specifically emotional abuse, could be significant risk factors for the subsequent development of cognitive symptoms of major depression. These influences might be specific to this depressive dimension and not found in any other dimension, which might have conceptual and therapeutic implications for clinicians and researchers alike.

Differential Recall Bias, Intermediate Confounding, and Mediation Analysis in Life Course Epidemiology: An Analytic Framework with Empirical Example

The mechanisms by which childhood socioeconomic status (CSES) affects adult mental health, general health, and well-being are not clear. Moreover, the analytical assumptions employed when assessing mediation in social and psychiatric epidemiology are rarely explained. The aim of this paper was to explain the intermediate confounding assumption, and to quantify differential recall bias in the association between CSES, childhood abuse, and mental health (SCL-10), general health (EQ-5D), and subjective well-being (SWLS). Furthermore, we assessed the mediating role of psychological and physical abuse in the association between CSES and mental health, general health, and well-being; and the influence of differential recall bias in the estimation of total effects, direct effects, and proportion of mediated effects. The assumptions employed when assessing mediation are explained with reference to a causal diagram. Poisson regression models (relative risk, RR and 99% CIs) were used to assess the association between CSES and psychological and physical abuse in childhood. Mediation analysis (difference method) was used to assess the indirect effect of CSES (through psychological and physical abuse in childhood) on mental health, general health, and well-being. Exposure (CSES) was measured at two time points. Mediation was assessed with both cross-sectional and longitudinal data. Psychological abuse and physical abuse mediated the association between CSES and adult mental health, general health, and well-being (6–16% among men and 7–14% among women, p < 0.001). The results suggest that up to 27% of the association between CSES and childhood abuse, 23% of the association between childhood abuse, and adult mental health, general health, and well-being, and 44% of the association between CSES and adult mental health, general health, and well-being is driven by differential recall bias. Assessing mediation with cross-sectional data (exposure, mediator, and outcome measured at the same time) showed that the total effects and direct effects were vastly overestimated (biased upwards). Consequently, the proportion of mediated effects were underestimated (biased downwards). If there is a true (unobserved) direct or indirect effect, and the direction of the differential recall bias is predictable, then the results of cross-sectional analyses should be discussed in light of that.

Adult mental health outcomes of child sexual abuse survivors born at extremely low birth weight

The high prevalence of child sexual abuse (CSA) is concerning, particularly as survivors are at increased risk for multiple adverse outcomes, including poor mental health across the lifespan. Children born at an extremely low birth weight (ELBW; <1000g) and who experience CSA may be a group that is especially vulnerable to psychopathology later in life. However, no research has considered the mental health risks associated with being born at ELBW and experiencing CSA. In this study, we investigated the mental health of 179 ELBW survivors and 145 matched normal birth weight (NBW; >2500g) participants at ages 22-26 and 29-36. At age 22-26, CSA was associated with increased odds of clinically significant internalizing (OR=7.32, 95% CI: 2.31-23.23) and externalizing (OR=4.65, 95% CI: 1.11-19.51) problems among ELBW participants exposed to CSA compared to those who did not, though confidence intervals were wide. At age 29-36, CSA was linked to increased odds of any current (OR=3.43, 95% CI: 1.08-10.87) and lifetime (OR=7.09, 95% CI: 2.00-25.03) non-substance use psychiatric disorders, however, this did not hold after adjustment for covariates. Statistically significant differences in mental health outcomes were not observed in NBW participants exposed to CSA compared to NBW participants who were not exposed. Survivors of significant perinatal adversity who are also exposed to CSA may be at higher risk for psychopathology through the fourth decade of life.

Child Abuse and Mental Disorders in Iranian Adolescents

Background

Child abuse is a serious social health problem all over the world with important adverse effects.

Objectives

The aim of this study was to extend our understanding of the relation between mental disorders and child abuse.

Materials and Methods

The study was designed as a cross-sectional survey on 700 students in secondary schools using multiple cluster sampling in Yazd, Iran in 2013. We applied 2 self reported questionnaires: DASS (depression anxiety stress scales)-42 for assessing mental disorders (anxiety, stress and depression) and a standard self-reported valid and reliable questionnaire for recording child abuse information in neglect, psychological, physical and sexual domains. The collected data was analyzed using SPSS software. P-values < 0.05 were considered as significant.

Results

There was a statically significant correlation between mental disorder and child abuse score (Spearman rho: 0.2; P-value < 0.001). The highest correlations between mental disorders and child abuse were found in psychological domain, Spearman’s rho coefficients were 0.46, 0.41 and 0.36 for depression, anxiety and stress respectively (P-value < 0.001). Based on the results of logistic regression for mental disorder, females, last born adolescents and subjects with drug or alcohol abuser parents had mental disorder odds of 3, 0.4 and 1.9 times compared to others; and severe psychological abuse, being severely neglected and having sexual abuse had odds 90, 1.6 and 1.5 respectively in another model.

Conclusions

Programming for mandatory reporting of child abuse by physicians and all health care givers e.g. those attending schools or health centers, in order to prevent or reduce its detrimental effects is useful and success in preventing child abuse could lead to reductions in the prevalence of mental disorders.

Mental Health and Behavioral Outcomes of Sexual and Nonsexual Child Maltreatment Among Child Welfare-Involved Youth

Our research team used the nationally representative National Survey of Child and Adolescent Well-Being II to explore the differences in mental health and behavioral outcomes between children who enter the child welfare system with substantiated sexual abuse and those who enter with exclusively nonsexual maltreatment. The sample included 380 children between the ages of 8 to 17.5 who were substantiated for maltreatment (sexual and nonsexual) and had the same caregivers at both wave 1 and 2 (n = 380). Results show that the average age of children in the sample was 11 years old, and the results corroborate literature that has indicated children and youth with histories of childhood sexual abuse experience significantly more post-traumatic stress disorder symptoms than children with histories of nonsexual maltreatment. This finding held after controlling for baseline trauma symptoms and all covariates, including race, age, placement type, and caregiver characteristics. Childhood sexual abuse was not significantly related to an increase in behavioral symptoms after controlling for covariates. Implications for research and practice are offered.

Childhood Sexual Abuse Moderates the Relationship Between Obesity and Mental Health in Low-Income Women

We examined whether a history of self-reported childhood sexual abuse (CSA) moderates the relationship between obesity and mental health symptoms (depression, anxiety, and posttraumatic stress disorder) in an ethnically diverse sample of low-income women. A community sample of 186 women completed self-report measures and had their weight and height measured. Body mass index and CSA had an interactive effect on all mental health measures, such that obese women with a CSA history reported substantially higher levels of all symptoms. These results give greater specificity to the obesity-mental health link reported in previous studies and provide possible directions for targeted intervention.

Impact of childhood adversities on specific symptom dimensions in first-episode psychosis

BACKGROUND

The relationship between childhood adversity (CA) and psychotic disorder is well documented. As the adequacy of the current categorical diagnosis of psychosis is being increasingly questioned, we explored independent associations between different types of CA and specific psychotic symptom dimensions in a well-characterized sample of first-episode psychosis (FEP) patients.

METHOD

This study involved 236 FEP cases aged 18-65 years who presented for the first time to psychiatric services in South London, UK. Psychopathology was assessed with the Positive and Negative Syndrome Scale and confirmatory factor analysis was used to evaluate the statistical fit of the Wallwork/Fortgang five-factor model of psychosis. CA prior to 17 years of age (physical abuse, sexual abuse, parental separation, parental death, and being taken into care) was retrospectively assessed using the Childhood Experience of Care and Abuse Questionnaire.

RESULTS

Childhood sexual abuse [β = 0.96, 95% confidence interval (CI) 0.40-1.52], childhood physical abuse (β = 0.48, 95% CI 0.03-0.93) and parental separation (β = 0.60, 95% CI 0.10-1.11) showed significant associations with the positive dimension; while being taken into care was associated with the excited dimension (β = 0.36, 95% CI 0.08-0.65), independent of the other types of CA. No significant associations were found between parental death and any of the symptom dimensions.

CONCLUSIONS

A degree of specificity was found in the relationships between different types of CA and psychosis symptom dimensions in adulthood, suggesting that distinct pathways may be involved in the CA-psychosis association. These potentially different routes to developing psychosis merit further empirical and theoretical exploration.

Mental health consequences of violence against women and girls

PURPOSE OF REVIEW

Recent studies on mental health consequences of violence against women and girls were reviewed in a range of situations.

RECENT FINDINGS

Although several studies continued to show cross-sectional associations between child sexual abuse (CSA) and mental health outcomes, a few prospective studies showed a robust association between CSA and depression. Studies on the impact of dating violence are still at a nascent stage and focus on antecedents of violence rather than its consequences. Women at higher risk, such as adolescents, migrants, the homeless, and women in the perinatal period have been studied and specific vulnerabilities identified. Women reporting bidirectional violence had higher rates of depression and post-traumatic stress disorder (PTSD). Cumulative violence, severity of violence, and recent violence are associated with higher morbidity. Studies among women in conflict zones have emphasized the role of different forms of sexual and physical violence on mental health.

SUMMARY

Newer emerging areas that need more research include mental health consequences of women in conflict zones and among same sex relationships. There are also few studies on the violence experience of both older women and adolescents. The need to better delineate the psychopathology of complex manifestations of PTSD is underscored.

Molecular signatures of major depression

Adversity, particularly in early life, can cause illness. Clues to the responsible mechanisms may lie with the discovery of molecular signatures of stress, some of which include alterations to an individual’s somatic genome. Here, using genome sequences from 11,670 women, we observed a highly significant association between a stress-related disease, major depression, and the amount of mtDNA (p = 9.00 × 10⁻⁴², odds ratio 1.33 [95% confidence interval [CI] = 1.29–1.37]) and telomere length (p = 2.84 × 10⁻¹⁴, odds ratio 0.85 [95% CI = 0.81–0.89]). While both telomere length and mtDNA amount were associated with adverse life events, conditional regression analyses showed the molecular changes were contingent on the depressed state. We tested this hypothesis with experiments in mice, demonstrating that stress causes both molecular changes, which are partly reversible and can be elicited by the administration of corticosterone. Together, these results demonstrate that changes in the amount of mtDNA and telomere length are consequences of stress and entering a depressed state. These findings identify increased amounts of mtDNA as a molecular marker of MD and have important implications for understanding how stress causes the disease.

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Amount of mtDNA is increased, and telomeric DNA is shortened in major depression

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Both changes can be induced with stress but are contingent on the depressed state

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Changes are tissue specific and in part due to glucocorticoid secretion

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Changes are in part reversible and represent switches in metabolic strategy

Low plasma eicosapentaenoic acid levels are associated with elevated trait aggression and impulsivity in major depressive disorder with a history of comorbid substance use disorder

Major depressive disorder (MDD) is associated with low levels of omega-3 polyunsaturated fatty acids (PUFAs), holding promise for new perspectives on disease etiology and treatment targets. As aggressive and impulsive behaviors are associated with low omega-3 PUFA levels in some clinical contexts, we investigated plasma PUFA relationships with trait aggression and impulsivity in patients with MDD. Medication-free MDD patients (n = 48) and healthy volunteers (HV, n = 35) were assessed with the Brown-Goodwin Aggression Inventory. A subset (MDD, n = 39; HV, n = 33) completed the Barratt Impulsiveness Scale. Plasma PUFAs eicosapentaenoic acid (EPA, 20:5n-3), docosahexaenoic acid (DHA, 22:6n-3), and arachidonic acid (AA, 20:4n-6) were quantified and ln-transformed to mitigate distributional skew. Ln-transformed PUFA (lnPUFA) levels were predictors in regression models, with aggression or impulsivity scores as outcomes, and cofactors of sex and diagnostic status (MDD with or without a history of substance use disorder [SUD], or HV). Interactions were tested between relevant PUFAs and diagnostic status. Additional analyses explored possible confounds of depression severity, self-reported childhood abuse history, and, in MDD patients, suicide attempt history. Among PUFA, lnEPA but not lnDHA predicted aggression (F1,76 = 12.493, p = 0.001), and impulsivity (F1,65 = 5.598, p = 0.021), with interactions between lnEPA and history of SUD for both aggression (F1,76 = 7.941, p = 0.001) and impulsivity (F1,65 = 3.485, p = 0.037). Results remained significant when adjusted for childhood abuse, depression severity, or history of suicide attempt. In conclusion, low EPA levels were associated with aggression and impulsivity only in patients with MDD and comorbid SUD, even though in most cases SUD was in full sustained remission.

Childhood sexual abuse and the development of recurrent major depression in Chinese women

BACKGROUND

Our prior study in Han Chinese women has shown that women with a history of childhood sexual abuse (CSA) are at increased risk for developing major depression (MD). Would this relationship be found in our whole data set?

METHOD

Three levels of CSA (non-genital, genital, and intercourse) were assessed by self-report in two groups of Han Chinese women: 6017 clinically ascertained with recurrent MD and 5983 matched controls. Diagnostic and other risk factor information was assessed at personal interview. Odds ratios (ORs) were calculated by logistic regression.

RESULTS

We confirmed earlier results by replicating prior analyses in 3,950 new recurrent MD cases. There were no significant differences between the two data sets. Any form of CSA was significantly associated with recurrent MD (OR 4.06, 95% confidence interval (CI) [3.19-5.24]). This association strengthened with increasing CSA severity: non-genital (OR 2.21, 95% CI 1.58-3.15), genital (OR 5.24, 95% CI 3.52-8.15) and intercourse (OR 10.65, 95% CI 5.56-23.71). Among the depressed women, those with CSA had an earlier age of onset, longer depressive episodes. Recurrent MD patients those with CSA had an increased risk for dysthymia (OR 1.60, 95%CI 1.11-2.27) and phobia (OR 1.41, 95%CI 1.09-1.80). Any form of CSA was significantly associated with suicidal ideation or attempt (OR 1.50, 95% CI 1.20-1.89) and feelings of worthlessness or guilt (OR 1.41, 95% CI 1.02-2.02). Intercourse (OR 3.47, 95%CI 1.66-8.22), use of force and threats (OR 1.95, 95%CI 1.05-3.82) and how strongly the victims were affected at the time (OR 1.39, 95%CI 1.20-1.64) were significantly associated with recurrent MD.

CONCLUSIONS

In Chinese women CSA is strongly associated with recurrent MD and this association increases with greater severity of CSA. Depressed women with CSA have some specific clinical traits. Some features of CSA were associated with greater likelihood of developing recurrent MD.