The Great Smoky Mountains Study: developmental epidemiology in the southeastern United States

The biological embedding of social adversity: How adolescent housing insecurity impacts inflammation over time

BACKGROUND & PURPOSE

Adolescent housing insecurity is a dynamic form of social adversity that impacts child health outcomes worldwide. However, the means by which adolescent housing insecurity may become biologically embedded to influence health outcomes over the life course remain unclear. Therefore, we aimed to utilize life course perspectives and advanced causal inference methods to evaluate the potential for inflammation to contribute to the biological embedding of adolescent housing insecurity.

MATERIALS AND METHODS

Using prospective data from the Great Smoky Mountains Study, we investigated the relationship between adolescent housing insecurity and whole-blood spot samples assayed for C-reactive protein (CRP). Adolescent housing insecurity was created based on annual measures of frequent residential moves, reduced standard of living, forced separation from the home, and foster care. Annual measures of CRP ranged from 0.001 mg/L to 13.6 mg/L (median = 0.427 mg/L) and were log10 transformed to account for positively skewed values. We used g-estimation of structural nested mean models to estimate a series of conditional average causal effects of adolescent housing insecurity on CRP levels from ages 11 to 16 years and interpreted the results within life course frameworks of accumulation, recency, and sensitive periods.

PRINCIPAL RESULTS

Of the 1,334 participants, 427 [44.3 %] were female. Based on the conditional average causal effect, one exposure to adolescent housing insecurity from ages 11 to 16 years led to a 6.4 % (95 % CI = 0.69 - 12.4) increase in later CRP levels. Exposure at 14 years of age led to a 27.9 % increase in CRP levels at age 15 (95 % CI = 6.5 - 53.5). Recent exposures to adolescent housing insecurity (<3 years) suggested stronger associations with CRP levels than distant exposures (>3 years), but limited statistical power prevented causal conclusions regarding recency effects at the risk of a Type II Error.

MAJOR CONCLUSIONS

These findings highlight inflammation-as indicated by increased CRP levels-as one potential mechanism for the biological embedding of adolescent housing insecurity. The results also suggest that adolescent housing insecurity-particularly recent, repeated, and mid-adolescent exposures-may increase the risk of poor health outcomes and should be considered a key intervention target.

Family cash transfers in childhood and birthing persons and birth outcomes later in life

Much literature in the US documents an intergenerational transmission of birthing person and perinatal morbidity in socioeconomically disadvantaged groups. A separate line of work indicates that family cash transfers may improve life chances of low-income families well into adulthood. By exploiting a quasi-random natural experiment of a large family cash transfer among a southeastern American Indian (AI) tribe in rural North Carolina, we examine whether a "perturbation" in socioeconomic status during childhood improves birthing person/perinatal outcomes when they become parents themselves. We acquired birth records on 6805 AI and non-AI infants born from 1995 to 2018. Regression methods to examine effect modification tested whether the birthing person's American Indian (AI) status and exposure to the family cash transfer during their childhood years corresponds with improvements in birthing person and perinatal outcomes. Findings show an increase in age at childbearing (coef: 0.15 years, 95% confidence interval [CI]: 0.05, 0.25) and a decrease in pre-pregnancy body mass index (BMI; coef: -0.42, 95% CI: -0.76, -0.09) with increased duration of cash transfer exposure during childhood. The odds of large-for-gestational age at delivery, as well as mean infant birthweight, is also reduced among AI births whose birthing person had relatively longer duration of exposure to the cash transfer. We, however, observe no relation with other birthing person/perinatal outcomes (e.g., tobacco use during pregnancy, preterm birth). In this rural AI population, cash transfers in one generation correspond with improved birthing person and infant health in the next generation.

Editorial: Cash Transfers to Families Living in Poverty: Can Benefits for Children Extend to the Next Generation?

Childhood poverty is the most widespread and important modifiable risk factor for the development of a range of health outcomes, including childhood-onset mental health problems.1 In the United States, 30 million children are growing up impoverished, which ranks among the highest per capita rates of child poverty among high-income countries.2 As a nation, the United States does less to support its poor children and their families than any other wealthy country, despite scientific evidence that growing up in poverty significantly increases lifetime risk of physical and mental health problems, reduces likelihood of academic and vocational success, and leads to poorer social outcomes for children.1 Meanwhile, 2 decades of research in low- and middle-income countries has demonstrated that directly providing poor families with financial support (commonly referred to as cash transfer programs)-delivered as one-time lump sum or smaller payments over time-produces reliably positive effects on a range of outcomes, including improved parental mental health, food security, housing security, educational and vocational attainment, female empowerment within families, as well as family savings and ownership of durable goods.3-6 Critics of cash transfer programs, who argue that poor families will exhibit temptation spending patterns (ie, alcohol, entertainment, etc), are increasingly being proven wrong by this literature, as studies have shown that recipient families tend to invest in the supports their children need to thrive.7.

Associations Between Configurations of Childhood Adversity and Adult Mental Health Disorder Outcomes

The life course perspective and cumulative inequality theory suggest that childhood adversity, occurring during a sensitive period of the life course, can have long-term consequences for adult mental health and well-being. Yet, the long-term influence of adversity on adult outcomes may depend on both the features of adverse childhood experiences (e.g., the number, type, and co-occurrence of adversities) as well as the outcome assessed. Using latent class analysis applied to several waves of prospective data from the Great Smoky Mountain Study (GSMS; N=1,420) we identify subpopulations that are similar in their adversity experiences before age 18. We then predict adult internalizing and substance use disorder diagnoses by adversity experience. Results reveal five distinct classes of adversity, with unique risks for specific diagnoses in adulthood.

Prospective Associations of Childhood Housing Insecurity With Anxiety and Depression Symptoms During Childhood and Adulthood

Importance

Childhood housing insecurity has dramatically increased in the US in recent decades, but whether an association with adverse mental health outcomes exists after adjusting for repeated measures of childhood poverty is unclear.

Objective

To test whether childhood housing insecurity is associated with later anxiety and depression symptoms after adjusting for time-varying measures of childhood poverty.

Design, Setting, and Participants

This prospective cohort study included individuals aged 9, 11, and 13 years at baseline from the Great Smoky Mountains Study in western North Carolina. Participants were assessed up to 11 times from January 1993 to December 2015. Data were analyzed from October 2021 to October 2022.

Exposure

Participants and their parents reported social factors annually when participants were 9 to 16 years of age. A comprehensive measure of childhood housing insecurity was constructed based on frequent residential moves, reduced standard of living, forced separation from home, and foster care status.

Main Outcomes and Measures

Between ages 9 and 16 years, the Child and Adolescent Psychiatric Assessment was used up to 7 times to evaluate childhood anxiety and depression symptoms. Adult anxiety and depression symptoms were assessed at ages 19, 21, 26, and 30 years using the Young Adult Psychiatric Assessment.

Results

Of the 1339 participants (mean [SD] age, 11.3 [1.63] years), 739 (55.2%; 51.1% weighted) were male; 1203 individuals assessed up to 30 years of age were included in the adulthood outcome analyses. Standardized mean (SD) baseline anxiety and depression symptom scores were higher among children who experienced housing insecurity than among those who never experienced housing insecurity (anxiety: 0.49 [1.15] vs 0.22 [1.02]; depression: 0.20 [1.08] vs -0.06 [0.82]). Individuals who experienced childhood housing insecurity had higher anxiety symptom scores (fixed effects: standardized mean difference [SMD], 0.21; 95% CI, 0.12-0.30; random effects: SMD, 0.25; 95% CI, 0.15-0.35) and higher depression symptom scores (fixed effects: SMD, 0.18; 95% CI, 0.09-0.28; random effects: SMD, 0.26; 95% CI, 0.14-0.37) during childhood. In adulthood, childhood housing insecurity was associated with higher depression symptom scores (SMD, 0.11; 95% CI, 0.00-0.21).

Conclusions and Relevance

In this cohort study, housing insecurity was associated with anxiety and depression during childhood and with depression during adulthood. Because housing insecurity is a modifiable, policy-relevant factor associated with psychopathology, these results suggest that social policies that support secure housing may be an important prevention strategy.

Sex Differences Define the Vulnerability to Atherosclerosis

For several decades, atherosclerosis has attracted the attention of researchers around the world. Even being a major cause of serious cardiovascular disease and events, atherosclerosis is still not fully understood. Despite the fact that the main players in the pathogenesis of atherosclerosis are well known, many mechanisms of their implementation and interactions remain unknown. The same can be said about the risk factors for atherosclerosis. Many of them are known, but exactly how they work remains to be seen. The main objective of this review is to summarize the latest data on sex as a biological variable in atherosclerosis in humans and animals; to determine what we do not still know about how sex affects the process of growth and complications of atherosclerosis. In this review, we summarized data on sex differences at 3 atherosclerotic aspects: inflammation, vascular remodeling, and plaque morphology. With all overviewed data, we came to the conclusion on the atheroprotective role of female sex.

Endocrine Health and Health Care Disparities in the Pediatric and Sexual and Gender Minority Populations: An Endocrine Society Scientific Statement

Endocrine care of pediatric and adult patients continues to be plagued by health and health care disparities that are perpetuated by the basic structures of our health systems and research modalities, as well as policies that impact access to care and social determinants of health. This scientific statement expands the Society's 2012 statement by focusing on endocrine disease disparities in the pediatric population and sexual and gender minority populations. These include pediatric and adult lesbian, gay, bisexual, transgender, queer, intersex, and asexual (LGBTQIA) persons. The writing group focused on highly prevalent conditions-growth disorders, puberty, metabolic bone disease, type 1 (T1D) and type 2 (T2D) diabetes mellitus, prediabetes, and obesity. Several important findings emerged. Compared with females and non-White children, non-Hispanic White males are more likely to come to medical attention for short stature. Racially and ethnically diverse populations and males are underrepresented in studies of pubertal development and attainment of peak bone mass, with current norms based on European populations. Like adults, racial and ethnic minority youth suffer a higher burden of disease from obesity, T1D and T2D, and have less access to diabetes treatment technologies and bariatric surgery. LGBTQIA youth and adults also face discrimination and multiple barriers to endocrine care due to pathologizing sexual orientation and gender identity, lack of culturally competent care providers, and policies. Multilevel interventions to address these disparities are required. Inclusion of racial, ethnic, and LGBTQIA populations in longitudinal life course studies is needed to assess growth, puberty, and attainment of peak bone mass. Growth and development charts may need to be adapted to non-European populations. In addition, extension of these studies will be required to understand the clinical and physiologic consequences of interventions to address abnormal development in these populations. Health policies should be recrafted to remove barriers in care for children with obesity and/or diabetes and for LGBTQIA children and adults to facilitate comprehensive access to care, therapeutics, and technological advances. Public health interventions encompassing collection of accurate demographic and social needs data, including the intersection of social determinants of health with health outcomes, and enactment of population health level interventions will be essential tools.

Early-childhood temperament moderates the prospective associations of coping with adolescent internalizing and externalizing symptoms

While appraisal and coping are known to impact adolescent psychopathology, more vulnerable or resilient responses to stress may depend on individual temperament. This study examined early life temperament as a moderator of the prospective relations of pre-adolescent appraisal and coping with adolescent psychopathology. The sample included 226 (62% female, 14–15 years) adolescents with assessments starting at 3 years of age. Adolescents were predominately White (12% Black 9% Asian, 11% Latinx, 4% Multiracial, and 65% White). Observed early-childhood temperament (fear, frustration, executive control, and delay ability) were tested as moderators of pre-adolescent coping (active and avoidant) and appraisal (threat, positive) on internalizing and externalizing symptoms during the pandemic. Interaction effects were tested using regression in R. Sex and family context of stress were covariates. Early-childhood temperament was correlated with pre-adolescent symptoms, however, pre-adolescent appraisal and coping but not temperament predicted adolescent psychopathology. Frustration moderated the relations of active and avoidant coping and positive appraisal to symptoms such that coping and appraisal related to lower symptoms only for those low in frustration. Executive control moderated the associations of avoidant coping with symptoms such that avoidance reduced the likelihood of symptoms for youth low in executive control. Findings underscore the role of emotionality and self-regulation in youth adjustment, with the impact of coping differing with temperament. These findings suggest that equipping youth with a flexible assortment of coping skills may serve to reduce negative mental health outcomes.

Editorial: Accelerated epigenetic ageing as a consequence of early environmental adversity

In this editorial, I discuss findings and implications of a hypothesis-generating study by Copeland and colleagues showing that early adverse events related to unpredictability as well as a cumulative score summarising environmental adversity in childhood and adolescence are linked to accelerated epigenetic ageing. The setting of this study is the longitudinal Great Smoky Mountains Study, a richly phenotyped longitudinal cohort with biological information. In my discussion, I focus on potential mechanisms behind the reported findings and opportunities for next steps, for example provided by the richness of data in the cohort used in this study.

Mental Health and Physical Activity of Female Higher Education Students during the COVID-19 Pandemic: A Comparative Cross-Sectional Study from Lithuania

During emerging adulthood (EA), higher education medical students undergo a higher risk of anxiety and depression compared to the general population. The aim of this comparative cross-sectional study was to compare the proportions of three mental disorders, namely anxiety, depression and somatisation in terms of their symptoms and self-reported physical activity (PA) levels across the cohorts of biomedical and non-biomedical female students as well as to assess the association between the mental health outcomes and PA use. Between September 2021 and January 2022, a total of 1231 female higher education students aged between 18 and 29 years old were recruited for the study. Severe symptoms of anxiety and depression, as well as unexplained somatic complaints, were suffered by 51.9%, 11% and 23% of female students, respectively. Non-biomedical female students, compared to medicine and health sciences students, were more vulnerable due to the increased prevalence of negative mental health outcomes. The relationship between increased sports activity as a potential trigger for mental well-being and decreased severity of depressive symptoms was identified in the cohorts of both biomedical (adjusted odd ratio (OR_adj) 0.4; 95% confidence interval (CI): 0.1-1.0) and non-biomedical (OR_adj 0.4; 95% CI: 0.2-0.9) female students. The current research highlights the importance of increasing sports activity by involving students in regular physical exercise of specific types for decreasing the severity of depressive symptoms in student-aged female populations.

Psychometric Properties of The Clinician Affective Reactivity Index for Assessment of Irritability in a Clinical Sample of Turkish Children and Adolescents

Background

No clinician-oriented scale exists to assess irritability in Turkey. This pilot study aimed to evaluate the psychometric properties of the Turkish version of The Clinician Affective Reactivity Index (CL-ARI).

Method

A total of 116 children and adolescents aged between 10 to 17 years (14.1 ± 2.1 years) were recruited from the psychiatric outpatient clinics. The participants completed a set of scales (Strengths and Difficulties Questionnaire [SDQ], Affective Reactivity Index [ARI], Revised Child Anxiety and Depression Scale, Swanson, Nolan, and Pelham, Version IV Scale). Diagnostic interviews were administered to confirm psychiatric diagnoses. Cronbach's alpha was calculated to assess internal consistency. Discriminant validity was further tested using independent sample t-test and Receiver Operating Characteristic curves. Interrater reliability was tested using intraclass correlation coefficients (ICC). Convergent validity was also tested using Pearson's correlation.

Results

Cronbach's alpha values of CL-ARI were 0.919 total score, 0.842 for the temper outbursts score, 0.861 for the irritable mood score, and 0.840 for the impairment score. ICC values for interrater reliability were high for the temper outbursts (r = 0.993), the irritable mood (r = 0.993), the impairment (r = 0.917), and the total score (r = 0.991). In the sample, there was a high level of correlation between the self-report ARI-child/parent form and the CL-ARI total and subscale scores. Likewise, moderate-high level of correlations were found between the behavioral SDQ child/parent forms and the CL-ARI total and subscale scores.

Conclusions

This is the Turkish validation of the CL-ARI, a dedicated interview and rating scale to assess irritability in the clinical sample. The results of this study suggest that the Turkish version of CL-ARI has adequate internal consistency and interrater reliability, and sufficient convergent and discriminant validity to be used in research settings.

Maternal Depressive Symptoms Predict General Liability in Child Psychopathology

Objective: The current study examines how maternal depressive symptoms relate to child psychopathology when structured via the latent bifactor model of psychopathology, a new organizational structure of psychopathological symptoms consisting of a general common psychopathology factor (p-factor) and internalizing- and externalizing-specific risk.Method: Maternal report of depressive symptoms (Beck Depression Inventory - II) and child psychopathological symptoms (Child Behavior Checklist and Children's Behavior Questionnaire) were provided by 554 mother-child pairs. Children in the sample were 7.7 years old on average (SD = 1.35, range = 5-11 years), and were 49.8% female, 46% Latinx, and 67% White, 6% Black, 5% Asian/Pacific Islander, and 21% multiracial.Results: Maternal depressive symptoms were positively associated with the child p-factor but not with the internalizing- or externalizing-specific factors. We did not find evidence of sex/gender or race/ethnicity moderation when using latent factors of psychopathology. Consistent with past research, maternal depressive symptoms were positively associated with internalizing and externalizing composite scores on the Child Behavior Checklist.Conclusions: Findings suggest that maternal depressive symptoms are associated with transdiagnostic risk for broad child psychopathology (p-factor). Whereas the traditional Achenbach-style approach of psychopathological assessment suggests that maternal depressive symptoms are associated with both child internalizing and externalizing problems, the latent bifactor model suggests that these associations may be accounted for by risk pathways related to the p-factor rather than internalizing or externalizing specific risk. We discuss clinical and research implications of using a latent bifactor structure of psychopathology to understand how maternal depression may impact children's mental health.

Depression and Anxiety and Their Associated Factors Among Jordanian Adolescents and Syrian Adolescent Refugees

The purpose of the current study was to determine the prevalence of depression and anxiety and their associated factors among Jordanian adolescents (n = 1,878) and Syrian adolescent refugees (n = 1,773) aged 12 to 17 years. The Center for Epidemiologic Studies-Depression Scale for Children (CES-DC), Patient Health Questionnaire-9-Modified, and Generalized Anxiety Disorder-7 questionnaire were used in this study. Approximately 27.2% of Jordanian adolescents and 28.3% of Syrian adolescent refugees had depression as assessed by the CES-DC. Among males, 17.6% of Jordanian adolescents and 19% of Syrian adolescent refugees had anxiety. Among females, 28.1% of Jordanian adolescents and 27.3% of Syrian adolescent refugees had anxiety. Overall, Jordanian adolescents and Syrian adolescent refugees had high prevalence of depression and anxiety. Establishing community-based mental health care in Jordan is crucial. [Journal of Psychosocial Nursing and Mental Health Services, 59(6), 23-30.].

Gender, the gender gap, and their interaction; analysis of relationships with children's mental health problems

PURPOSE

The present study seeks to examine gender differences in internalizing and externalizing problems either parent/teacher or self-reported and to investigate the influence of country-level gender gap on children's mental health problems across countries with high and low gender gap across Europe.

METHODS

The School Children's Mental Health in Europe (SCMHE) survey collected data on primary school children living in six European countries, using self-reports (SR) from children (Dominic Interactive), as well as combination of parent- and teacherreports (P/T C) (Strengths and Difficulties Questionnaire) to assess internalizing and externalizing mental health problems. The World Economic Forum's (WEF's) Global Gender Gap report's Gender Gap Index (GGI) was used to categorize countries with high and low gender gap.

RESULTS

Boys had greater odds of externalizing problems (OR = 2.6 P/T C, 1.95 SR), and lower odds of internalizing problems (OR = 0.85 P/T C, 0.63 SR). The gender gap's association with mental health problems was different depending on the informant used to identify these problems. A small gap was a risk factor based on reports from adults for externalizing (OR = 1.53) and internalizing problems (OR = 1.42) while it was a protective factor for SR internalizing problems (OR = 0.72). For these problems the gender gap impacted boys and girls differently: a small gender gap was protective for boys but not for girls, including when controlling for key confounding variables.

CONCLUSIONS

The differential impact of country-level gender gap observed between self-reported and parent- or teacher-reported mental health is complex but nevertheless present trough mechanisms that are worthwhile to study in depth, with a special attention to the informants and the type of problems examined.

Longitudinal associations of trauma exposure with disordered eating: Lessons from the Great Smoky Mountains Study

Disordered eating is prevalent among trauma survivors, yet little is known about mechanisms underlying this relation. We explored cross-sectional and longitudinal associations of trauma exposure and posttraumatic stress disorder symptoms (PTSD) with disordered eating among 1,420 community-based youth participating in the Great Smoky Mountain Study. Participants were interviewed about trauma exposure, PTSD symptoms, and disordered eating at regular intervals throughout childhood, adolescence, and early adulthood. Our findings confirmed associations of all forms of trauma exposure (violent, sexual, and other) with disordered eating symptoms in childhood and adulthood, although the pattern of results varied by disordered eating symptom and trauma exposure type. Only non-sexual, non-violent trauma exposure in childhood had significant associations with any disordered eating symptoms in adulthood. Within childhood, trauma exposures but not PTSD symptoms showed significant longitudinal associations with bulimia nervosa symptoms and sustained appetite changes and preoccupation with eating. In adulthood, PTSD symptoms but not trauma exposures showed significant longitudinal associations only with bulimia nervosa symptoms. The association of specific PTSD clusters on bulimia nervosa symptoms was significant for reexperiencing, whereas hyperarousal symptoms trended toward significance. The impact of trauma exposures on disordered eating may vary by developmental period.

Cohort profile: The Youth and Mental Health Study (YAMHS) - a longitudinal study of the period from adolescence to adulthood

The aim of this article is to provide a detailed description of the Youth and Mental Health Study (YAMHS),a population-based, representative (cluster sampling), prospective cohort study that was conducted to investigate risk and resilience factors for mental health conditions, specifically depressive symptoms and disorders, from adolescence to adulthood. The baseline data were collected in 1998 (T1) in two counties in central Norway from 2464 adolescents (response rate 88.3%, mean age 13.7 years). The first follow-up was conducted in 1999 (T2) (n = 2432, response rate of 87.1%, mean age 14.9 years). A subgroup of individuals was assessed at T2 (n = 345) with clinical interviews, and this subgroup was reassessed in 2005 (T3) (n = 265, 70.1%, 20 years). The last follow-up (of participants assessed at T1 and T2) was conducted in 2012 (T4) (n = 1266, 51.9%, 27.2 years). Demographics, depressive symptoms, general psychopathology, suicidal ideation and attempts and psychological and somatic factors were recorded. Among adolescents of both sexes, psychosocial variables were correlated with and predicted depressive symptom severity. The strongest predictors were sex (female), the levels of depressive symptoms the preceding year, and the total number of stressful events. The association between stressful life events and depressive symptoms was moderated by physical activity, while the relationship between stressful events and coping style was mediated by depressive symptoms. The rate of use of specialised mental health services among the depressed was low. The lifetime prevalence of depressive disorders was 23% at 15 years, and the most common disorder was minor depression. Adolescents who attempted suicide were more often victims of violence and less resilient than were non-suicide attempters. The existing longitudinal data from the cohort will be further analysed. Follow-up data will be obtained from existing national registries by links created with individual identification numbers.

Using the tools of genetic epidemiology to understand sex differences in neuropsychiatric disorders

Many neuropsychiatric disorders exhibit differences in prevalence, age of onset, symptoms or course of illness between males and females. For the most part, the origins of these differences are not well understood. In this article, we provide an overview of sex differences in psychiatric disorders including autism spectrum disorder (ASD), attention deficit/hyperactivity disorder (ADHD), anxiety, depression, alcohol and substance abuse, schizophrenia, eating disorders and risk of suicide. We discuss both genetic and nongenetic mechanisms that have been hypothesized to underlie these differences, including ascertainment bias, environmental stressors, X‐ or Y‐linked risk loci, and differential liability thresholds in males and females. We then review the use of twin, family and genome‐wide association approaches to study potential genetic mechanisms of sex differences and the extent to which these designs have been employed in studies of psychiatric disorders. We describe the utility of genetic epidemiologic study designs, including classical twin and family studies, large‐scale studies of population registries, derived recurrence risks, and molecular genetic analyses of genome‐wide variation that may enhance our understanding sex differences in neuropsychiatric disorders.

Life Course Approaches to the Causes of Health Disparities

Reducing health disparities requires an understanding of the mechanisms that generate disparities. Life course approaches to health disparities leverage theories that explain how socially patterned physical, environmental, and socioeconomic exposures at different stages of human development shape health within and across generations and can therefore offer substantial insight into the etiology of health disparities. Life course approaches are informed by developmental and structural perspectives. Developmental perspectives emphasize how socially patterned exposures to risk factors during sensitive life stages shift health trajectories, whereas structural perspectives emphasize how social identity and position within socially patterned environments disproportionately allocate risk factors and resources, resulting in altered health trajectories. We conclude that the science of health disparities will be advanced by integrating life course approaches into etiologic and intervention research on health disparities. The following 4 strategies are offered to guide in this process: (1) advance the understanding of multiple exposures and their interactions, (2) integrate life course approaches into the understanding of biological mechanisms, (3) explore transgenerational transmission of health disparities, and (4) integrate life course approaches into health disparities interventions.

Uppsala Longitudinal Adolescent Depression Study (ULADS)

PURPOSE

To present the Uppsala Longitudinal Adolescent Depression Study, initiated in Uppsala, Sweden, in the early 1990s. The initial aim of this epidemiological investigation was to study the prevalence, characteristics and correlates of adolescent depression, and has subsequently expanded to include a broad range of social, economic and health-related long-term outcomes and cost-of-illness analyses.

PARTICIPANTS

The source population was first-year students (aged 16-17) in upper-secondary schools in Uppsala during 1991-1992, of which 2300 (93%) were screened for depression. Adolescents with positive screening and sex/age-matched peers were invited to a comprehensive assessment. A total of 631 adolescents (78% females) completed this assessment, and 409 subsequently completed a 15-year follow-up assessment. At both occasions, extensive information was collected on mental disorders, personality and psychosocial situation. Detailed social, economic and health-related data from 1993 onwards have recently been obtained from the Swedish national registries for 576 of the original participants and an age-matched reference population (N≥200 000).

FINDINGS TO DATE

The adolescent lifetime prevalence of a major depressive episode was estimated to be 11.4%. Recurrence in young adulthood was reported by the majority, with a particularly poor prognosis for those with a persistent depressive disorder or multiple somatic symptoms. Adolescent depression was also associated with an increased risk of other adversities in adulthood, including additional mental health conditions, low educational attainment and problems related to intimate relationships.

FUTURE PLANS

Longitudinal studies of adolescent depression are rare and must be responsibly managed and utilised. We therefore intend to follow the cohort continuously by means of registries. Currently, the participants are approaching mid-adulthood. At this stage, we are focusing on the overall long-term burden of adolescent depression. For this purpose, the research group has incorporated expertise in health economics. We would also welcome extended collaboration with researchers managing similar datasets.

Prevalence and stability of mental disorders among young adults: findings from a longitudinal study

BACKGROUND

Mental disorders often have onset early in life, contribute substantially to the global disease burden, and may interfere with young people's ability to complete age-relevant tasks in important developmental periods. However, knowledge about prevalence and course of mental disorders in young adulthood is sparse. The aim of the current study was to estimate prevalence and stability of mental disorders from the twenties to the thirties/forties.

METHODS

DSM-IV mental disorders were assessed with the Composite International Diagnostic Interview in two waves (1999-2004 and 2010-2011) in 1623 young adult Norwegian twins (63.2% women, aged 19-29 years in wave 1).

RESULTS

In wave 1, the 12-month prevalence of any mental disorder among people in the twenties was 19.8% (men) and 32.4% (women), anxiety disorders: 9.6% (men) and 26.7% (women), anxiety disorders excluding specific phobias: 2.5% (men) and 6.9% (women), major depressive disorder (MDD): 4.4% (men) and 7.2% (women), and alcohol use disorder (AUD): 8.7% (men) and 4.4% (women). The prevalence of any mental disorder decreased from the twenties to the thirties/forties. This was due to a decrease in AUD and specific phobias. Anxiety disorders in the twenties predicted anxiety disorders and MDD ten years later, even when controlling for the association between these disorders in the twenties. MDD in the twenties predicted MDD ten years later. At both ages, two-week and 12-month prevalence estimates differed markedly for MDD - indicating an episodic course.

CONCLUSIONS

Common mental disorders are highly prevalent among young adults in the twenties, and somewhat less prevalent in the thirties/forties. Those who suffer from one mental disorder in the twenties are at considerably increased risk for suffering from a disorder ten years later as well. This may have significant implications for young people's ability to attain education, establish a family, and participate in occupational life.

Endocrinological and subjective stress responses in children with depressive, anxiety, or externalizing disorders

In this study, we used a stress test to investigate endocrinological and subjective stress responses of 8- to 14-year-old children with internalizing or externalizing disorders and healthy controls. The sample (N = 170) consisted of clinical and community children. Parents were given a diagnostic interview to diagnose their children's psychiatric condition. We measured saliva cortisol and subjectively experienced arousal in children before and after the Trier Social Stress Test for Children. Children also rated their performance immediately after the stress test, and 1 hr later they rated their positive and negative thoughts about this stressful event. Children with internalizing or externalizing disorders exhibited a blunted cortisol response compared to healthy controls. Depressed children rated their test performance lower and reported more negative thoughts after the test in comparison to healthy controls, anxious children reported more arousal before and after the task, and children with externalizing disorders reported more positive thoughts. In regression analyses, cortisol and subjective stress responses were both predictive of psychiatric disorders. The study extends previous work on the relation between psychiatric disorders and children's stress responses to an experimentally induced stress task by including a broad range of psychiatric disorders and by integrating endocrinological and subjective stress responses.

The 2015 Middle Childhood Survey (MCS) of mental health and well-being at age 11 years in an Australian population cohort

PURPOSE

The Middle Childhood Survey (MCS) was designed as a computerised self-report assessment of children's mental health and well-being at approximately 11 years of age, conducted with a population cohort of 87 026 children being studied longitudinally within the New South Wales (NSW) Child Development Study.

PARTICIPANTS

School Principals provided written consent for teachers to administer the MCS in class to year 6 students at 829 NSW schools (35.0% of eligible schools). Parent or child opt-outs from participation were received for 4.3% of children, and MCS data obtained from 27 808 children (mean age 11.5 years, SD 0.5; 49.5% female), representing 85.9% of students at participating schools.

FINDINGS TO DATE

Demographic characteristics of participating schools and children are representative of the NSW population. Children completed items measuring Social Integration, Prosocial Behaviour, Peer Relationship Problems, Supportive Relationships (at Home, School and in the Community), Empathy, Emotional Symptoms, Conduct Problems, Aggression, Attention, Inhibitory Control, Hyperactivity-Inattention, Total Difficulties (internalising and externalising psychopathology), Perceptual Sensitivity, Psychotic-Like Experiences, Personality, Self-esteem, Daytime Sleepiness and Connection to Nature. Distributions of responses on each item and construct demarcate competencies and vulnerabilities within the population: most children report mental health and well-being, but the population distribution spanned the full range of possible scores on every construct.

FUTURE PLANS

Multiagency, intergenerational linkage of the MCS data with health, education, child protection, justice and early childhood development records took place late in 2016. Linked data were used to elucidate patterns of risk and protection across early and middle child development, and these data will provide a foundation for future record linkages in the cohort that will track mental and physical health, social and educational/occupational outcomes into adolescence and early adulthood.

Similar familial underpinnings for full and subsyndromal pediatric bipolar disorder: A familial risk analysis

OBJECTIVES

To examine the validity of subthreshold pediatric bipolar I disorder (BP-I), we compared the familial risk for BP-I in the child probands who had either full BP-I, subthreshold BP-I, ADHD, or were controls that neither had ADHD nor bipolar disorder.

METHODS

BP-I probands were youth aged 6-17 years meeting criteria for BP-I, full (N=239) or subthreshold (N=43), and also included were their first-degree relatives (N=687 and N=120, respectively). Comparators were youth with ADHD (N=162), controls without ADHD or bipolar disorder (N=136), and their first-degree relatives (N=511 and N=411, respectively). We randomly selected 162 non-bipolar ADHD probands and 136 non-bipolar, non-ADHD control probands of similar age and sex distribution to the BP-I probands from our case-control ADHD family studies. Psychiatric assessments were made by trained psychometricians using the Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children Epidemiological Version (KSADS-E) and Structured Clinical Interview for DSM-IV (SCID) structured diagnostic interviews. We analyzed rates of bipolar disorder using multinomial logistic regression.

RESULTS

Rates of full BP-I significantly differed between the four groups (χ23 =32.72, P<.001): relatives of full BP-I probands and relatives of subthreshold BP-I probands had significantly higher rates of full BP-I than relatives of ADHD probands and relatives of control probands. Relatives of full BP-I, subthreshold BP-I, and ADHD probands also had significantly higher rates of major depressive disorder compared to relatives of control probands.

CONCLUSIONS

Our results showed that youth with subthreshold BP-I had similarly elevated risk for BP-I and major depressive disorder in first-degree relatives as youth with full BP-I. These findings support the diagnostic continuity between subsyndromal and fully syndromatic states of pediatric BP-I disorder.

Developmental Psychopathology: Risk and Resilience in the Transition to Young Adulthood

The transition from adolescence to young adulthood is a challenging time for many young people, given the multiple simultaneous demands placed by biological, psychological, and social forces that affect an individual's development. There are additional challenges when one is coping with ongoing or evolving mental health disorders. This article focuses on the demographics of transitional age youth, ages 16 to 26 years, in the United States, the unique characteristics of this developmental period, and how risk and resilience factors may affect the course of development and an individual's pathway to adulthood.