School Achievement and Risk of Eating Disorders in a Swedish National Cohort

Treating the individual: moving towards personalised eating disorder care

Eating disorders (EDs) are complex and heterogeneous conditions, which are often not resolved with conventional, manualised treatments. Arguments for the development of holistic, person-centred treatments accounting for individual variability have been mounting amongst researchers, clinicians and people with lived experience alike. This review explores the transformative potential of personalised medicine in ED care, emphasising the integration of precision diagnostics and tailored interventions based on individual genetic, biological, psychological and environmental profiles. Building on advancements in genomics, neurobiology, and computational technologies, it advocates for a shift from categorical diagnostic frameworks to symptom-based and dimensional approaches. The paper summarises emerging evidence supporting precision psychiatry, including the development of biomarkers, patient-reported outcomes, predictive modelling, and staging models, and discusses their application in ED research and clinical care. It highlights the utility of machine learning and idiographic statistical methods in optimising therapeutic outcomes and identifies key challenges, such as ethical considerations, scalability and implementation.

Cognitive Functions in Adolescent Girls with Anorexia Nervosa during Nutritional Rehabilitation

BACKGROUND

The present study aimed to evaluate cognitive function and laboratory parameters in adolescent girls with anorexia nervosa (AN) before and after nutritional rehabilitation (NR) compared to healthy female peers (CG).

METHODS

We evaluated 36 girls with AN at two-time points, during acute malnutrition (AN1) and after NR, in a partially normalized weight status (AN2). We compared their cognitive functions and laboratory parameters to 48 healthy CG subjects. Cognitive function was assessed using a Cognitive Assessment Battery (CAB) assessment, depressive symptom levels were assessed using a Beck Depression Inventory (BDI) assessment, and eating disorders were assessed using an Eating Attitude Test (EAT-26).

RESULTS

The AN1 group scored better in total cognition, attention, estimation, and spatial perception than the CG group (p < 0.05), with scores increasing in the AN2 group. Shifting and visual perception values did not differ between the study groups (p = 0.677, p = 0.506, respectively). Laboratory tests showed no significant abnormalities and did not differ significantly between groups (p > 0.05). There was a negative correlation for EAT-26 and CAB in the AN1 group (rho = -0.43, p = 0.01), but not for BDI.

CONCLUSIONS

Cognitive function in adolescent girls with AN was better than CG and correlated with EAT-26 score. These results highlight the high compensatory capacity of the adolescent body to maintain cognitive function despite severe malnutrition. Our results suggest that although normalization of body weight is crucial, other factors can significantly influence improvements in cognitive function. Cognitive deficits and laboratory tests may not be biomarkers of early forms of AN.

Interplay of polygenic liability with birth-related, somatic, and psychosocial factors in anorexia nervosa risk: a nationwide study

BACKGROUND

Although several types of risk factors for anorexia nervosa (AN) have been identified, including birth-related factors, somatic, and psychosocial risk factors, their interplay with genetic susceptibility remains unclear. Genetic and epidemiological interplay in AN risk were examined using data from Danish nationwide registers. AN polygenic risk score (PRS) and risk factor associations, confounding from AN PRS and/or parental psychiatric history on the association between the risk factors and AN risk, and interactions between AN PRS and each level of target risk factor on AN risk were estimated.

METHODS

Participants were individuals born in Denmark between 1981 and 2008 including nationwide-representative data from the iPSYCH2015, and Danish AN cases from the Anorexia Nervosa Genetics Initiative and Eating Disorder Genetics Initiative cohorts. A total of 7003 individuals with AN and 45 229 individuals without a registered AN diagnosis were included. We included 22 AN risk factors from Danish registers.

RESULTS

Risk factors showing association with PRS for AN included urbanicity, parental ages, genitourinary tract infection, and parental socioeconomic factors. Risk factors showed the expected association to AN risk, and this association was only slightly attenuated when adjusted for parental history of psychiatric disorders or/and for the AN PRS. The interaction analyses revealed a differential effect of AN PRS according to the level of the following risk factors: sex, maternal age, genitourinary tract infection, C-section, parental socioeconomic factors and psychiatric history.

CONCLUSIONS

Our findings provide evidence for interactions between AN PRS and certain risk-factors, illustrating potential diverse risk pathways to AN diagnosis.

Adolescent leisure-time physical activity and eating disorders: a longitudinal population-based twin study

PURPOSE

High levels of physical activity have been documented in eating disorder patients. Our aim was to examine whether adolescent leisure-time physical activity is prospectively associated with eating disorders in adolescence and young adulthood.

METHODS

Finnish twins born in 1983-1987 reported their physical activity frequency at ages 12, 14, and 17. A subsample of participants underwent structured, retrospective interviews for eating disorders at the mean age of 22.4 years. Associations between female twins' physical activity and future eating disorders (571-683 twins/wave) were investigated with the Cox proportional hazards model. To illustrate the physical activity similarity of the co-twins in a twin pair, we used cross-tabulation of eating disorder-discordant twin pairs (13-24 pairs/wave).

RESULTS

After adjusting for several covariates, we found no statistically significant longitudinal association between physical activity and eating disorders. This applied when all eating disorders were combined but also when assessed separately as restrictive and non-restrictive eating disorders. Co-twins' physical activity in adolescence tended to be similar irrespective of their future eating disorder, supporting the results of the regression analysis.

CONCLUSION

We observed no evidence of adolescent physical activity frequency being prospectively associated with eating disorders in female twins. Further longitudinal studies with larger sample sizes and more detailed physical activity data are needed.

LEVEL OF EVIDENCE

III, evidence obtained from cohort or case-control analytic studies.

Role of parental educational level as psychosocial factor in a sample of inpatients with anorexia nervosa and bulimia nervosa

Introduction

Evidence on parental educational level (PEL) as a risk factor for Eating Disorders (EDs) is mixed, and no study has assessed its role in relation to the compliance and outcomes of treatments in EDs. Further, no study differentiated from the educational level of mothers and fathers, nor considered the possible mediation of perfectionism in fostering EDs.

Methods

A clinical sample of 242 first-ever admitted inpatients with EDs provided information on PEL and completed the following questionnaires: the Eating Disorder Examination Questionnaire (EDE-Q) and the Frost Multidimensional Perfectionism Scale (F-MPS). Clinicians also provided information on the Hamilton Rating Scale for Anxiety (HAM-A) and the Hamilton Rating Scale for Depression (HAM-D) for each participant.

Results

Individuals with high PEL (whether mothers, fathers, or both parents) showed significantly higher scores on depressive symptoms and lower on parental criticism, were younger, had an earlier age of onset, had fewer years of illness, more were students and employed, and fewer had offspring. Individuals with fathers or both parents with high educational levels suffered more from Anorexia Nervosa rather than Bulimia Nervosa, had a longer length of stay during the current hospitalization, had less dietary restraint, and had higher personal standards. Individuals with mothers with high educational levels showed a lower rate of previous substance or alcohol addiction. Personal standards partially mediated the relationship between higher PEL and lower dietary restraint.

Discussion

PEL emerged to be a twofold psychosocial risk factor, being associated with higher depressive symptoms and a longer length of stay, but also with a shorter duration of illness and better scholar and working involvement. Higher PEL was related to higher personal standards but not to global perfectionism. Patterns of eating psychopathology emerged based on the high PEL of mothers or fathers.

Exploring the influences of education, intelligence and income on mental disorders

Background

Previous studies have shown that educational attainment (EA), intelligence and income are key factors associated with mental disorders. However, the direct effects of each factor on major mental disorders are unclear.

Aims

We aimed to evaluate the overall and independent causal effects of the three psychosocial factors on common mental disorders.

Methods

Using genome-wide association study summary datasets, we performed Mendelian randomisation (MR) and multivariable MR (MVMR) analyses to assess potential associations between the 3 factors (EA, N=766 345; household income, N=392 422; intelligence, N=146 808) and 13 common mental disorders, with sample sizes ranging from 9907 to 807 553. Inverse-variance weighting was employed as the main method in the MR analysis.

Results

Our MR analysis showed that (1) higher EA was a protective factor for eight mental disorders but contributed to anorexia nervosa, obsessive-compulsive disorder (OCD), bipolar disorder (BD) and autism spectrum disorder (ASD); (2) higher intelligence was a protective factor for five mental disorders but a risk factor for OCD and ASD; (3) higher household income protected against 10 mental disorders but confers risk for anorexia nervosa. Our MVMR analysis showed that (1) higher EA was a direct protective factor for attention-deficit/hyperactivity disorder (ADHD) and insomnia but a direct risk factor for schizophrenia, BD and ASD; (2) higher intelligence was a direct protective factor for schizophrenia but a direct risk factor for major depressive disorder (MDD) and ASD; (3) higher income was a direct protective factor for seven mental disorders, including schizophrenia, BD, MDD, ASD, post-traumatic stress disorder, ADHD and anxiety disorder.

Conclusions

Our study reveals that education, intelligence and income intertwine with each other. For each factor, its independent effects on mental disorders present a more complex picture than its overall effects.

Prevalence and related factors of eating disorders in pregnancy: a systematic review and meta-analysis

PURPOSE

To reveal the prevalence of eating disorders (EDs) and related factors in pregnancy.

METHODS

The search was performed in PubMed, EBSCOhost, Web of Science, Scopus, Google Scholar, and Ovid databases search up to April 3, 2022, using the keywords combination of "(eating disorders OR anorexia nervosa OR bulimia nervosa OR binge eating disorder) AND (pregnancy OR pregnant)". Two researchers independently extracted data from the articles using a standard form. We evaluated the quality of the studies according to the Joanna Briggs Institute assessment tools.

RESULTS

The prevalence of EDs in pregnant women in the 11 studies involving 2,369,520 pregnant women was ranging between 0.5 and 10.6%. The prevalence of EDs in pregnant women was 4.3% (95% confidence interval 2%-9%; I2 = 99.5%). The prevalence of anorexia nervosa and binge eating disorder during pregnancy shows a statistically significant increase compared to pre-pregnancy, and the prevalence of bulimia nervosa during pregnancy decreases. The prevalence of EDs is higher in pregnant women under 30 years of age, secondary school graduates, married, and with normal BMI. Half of the pregnant women with EDs had anxiety and about one-third of pregnant women had depression. Excessive exercise is observed in 0.7% of pregnant women, fasting in 0.3%, laxative or diuretic use in 0.1%, and self-induced vomiting in 0.6%.

CONCLUSIONS

This study is important as it is the first systematic review and meta-analysis to reveal the global prevalence of EDs in pregnant women and related factors. Continuing routine screening tests to detect EDs during pregnancy may contribute to taking special preventive measures for risk groups and protecting mother-child health.

TRIAL REGISTRATION

PROSPERO registration number (CRD42022324721), date of registration: 10/05/2022.

Unraveling shared susceptibility loci and Mendelian genetic associations linking educational attainment with multiple neuropsychiatric disorders

Background

Empirical studies have demonstrated that educational attainment (EA) is associated with neuropsychiatric disorders (NPDs), suggesting a shared etiological basis between them. However, little is known about the shared genetic mechanisms and causality behind such associations.

Methods

This study explored the shared genetic basis and causal relationships between EA and NPDs using the high-definition likelihood (HDL) method, cross phenotype association study (CPASSOC), transcriptome-wide association study (TWAS), and bidirectional Mendelian randomization (MR) with summary-level data for EA (N = 293,723) and NPDs (N range = 9,725 to 455,258).

Results

Significant genetic correlations between EA and 12 NPDs (rg range - 0.49 to 0.35; all p < 3.85 × 10-3) were observed. CPASSOC identified 37 independent loci shared between EA and NPDs, one of which was novel (rs71351952, mapped gene: ARFGEF2). Functional analyses and TWAS found shared genes were enriched in brain tissue, especially in the cerebellum and highlighted the regulatory role of neuronal signaling, purine nucleotide metabolic process, and cAMP-mediated signaling pathways. CPASSOC and TWAS supported the role of three regions of 6q16.1, 3p21.31, and 17q21.31 might account for the shared causes between EA and NPDs. MR confirmed higher genetically predicted EA lower the risk of ADHD (ORIVW: 0.50; 95% CI: 0.39 to 0.63) and genetically predicted ADHD decreased the risk of EA (Causal effect: -2.8 months; 95% CI: -3.9 to -1.8).

Conclusion

These findings provided evidence of shared genetics and causation between EA and NPDs, advanced our understanding of EA, and implicated potential biological pathways that might underlie both EA and NPDs.

Educational attainment in eating disorders: What can we learn from visualising data

BACKGROUND

Educational attainment is an understudied outcome in eating disorders (ED). We compared the educational attainment of individuals with and without ED.

METHODS

This study is a nationwide, register-based, observational epidemiological study using record linkage. The studied cohorts were (1) all persons treated psychiatrically for ED from 1970 to 2014, and (2) a control population matched for sex, age, and place of residence. The International Standard Classification of Education 2011 was used to classify educational attainment. We employed ineqord, a series of graphical and analytical tools that are appropriate for comparing the distributions of ordinal data (Jenkins, 2020).

RESULTS

Females with ED attained higher educational levels than males with ED. Males with ED had lower average educational levels than controls. On average, female controls attained higher educational levels than patients with ED in the eating disorders not otherwise specified or overeating groups. Females with anorexia nervosa, differed from matched controls: While their median was the same, too many participants were in the lower and higher levels of educational attainment. Females with bulimia nervosa had higher educational levels than matched controls on average.

CONCLUSIONS

Educational attainment differs between individuals with and without out ED for all ED diagnoses and in both sexes.

The Effect of Sociocultural Attitudes on Developing Eating Disorders Among Young Females in Almadinah Almunawarah, Saudi Arabia

BACKGROUND

Eating disorders (ED) are believed to be more susceptible in women due to varied factors involving dissatisfaction with their body and appearance. The exact cause of ED isn't known. But it may be triggered by biological, psychological, environmental, and social factors.

OBJECTIVES

The current literature aims to explore the body dissatisfaction of women from Almadinah Almunawarah and factors that may contribute to developing risk of ED and assess the discrepancies between desired and healthy BMI.

METHODS

The Sociocultural Attitudes Toward Appearance Questionnaire-4 (SATAQ-4) questionnaire surveyed 384 females to explore family, peer, and media pressure, followed by the Eating Attitudes Test-26 (EAT-26) questionnaire to recognize those at risk of developing ED. The body dissatisfaction of the sample was measured by the difference between the healthy BMI and the desired BMI.

RESULTS

A total of 127 of the participants, who were reported to have a high probability of developing an ED, had the highest factor scored in the SATAQ-4 questionnaire being media exposure with a p-value less than 0.001. The study showed a difference in the ideal body and what is considered a healthy BMI. Results showed no correlation between BMI and developing ED.

DISCUSSION

Women of younger age groups are more vulnerable to being under the influence of sociocultural attitudes, thus they are more susceptible to developing risky eating behaviors. This can be affected by family, peers, and media factors.

CONCLUSION

The findings of this study show a high prevalence of risky eating behaviors, particularly among those who experience family and media pressure toward body shape and weight. Peer pressure was also identified as a significant risk factor. These findings emphasize the need for interventions that target sociocultural attitudes and provide support for vulnerable individuals.

Gender Expression, Weight Status, and Risk of Experiencing Eating Disorders among Gender-Diverse Adults Assigned Male at Birth in Bangkok, Thailand

This study examines the association between gender expression, weight status, and the risk of experiencing eating disorders among gender-diverse adults assigned male at birth living in Bangkok, Thailand. Participants completed self-administered questionnaires to provide demographic data and anthropometric measures, and an Eating Attitude Test-26 (EAT-26) to determine the risk of experiencing eating disorders. The associations between gender expression, weight status, and the risk of experiencing eating disorders were analyzed using multivariable logistic regression models. No significant differences were observed in weight-related variables based on gender expression. Participants self-described as feminine/androgynous had lower odds of experiencing a high risk of eating disorders compared to those self-described as masculine (odds ratio (OR) = 0.49; 95% confidence interval (95% CI) = 0.27, 0.88). A higher body mass index (BMI) (OR = 1.07; 95% CI = 1.01, 1.14) and BMI discrepancy (OR = 1.13; 95% CI = 1.03, 1.24) were associated with higher odds of engaging in extreme weight-control behaviors. The risk of experiencing eating disorders among Thai gender-diverse adults assigned male at birth could differ across gender expression and weight status. Further research is needed to expand the understanding of these relationships and develop tailored intervention programs to mitigate the risk.

School achievement in adolescence and the risk of mental disorders in early adulthood: a Finnish nationwide register study

School grades in adolescence have been linked to later psychiatric outcomes, but large-scale nationwide studies across the spectrum of mental disorders are scarce. In the present study, we examined the risk of a wide array of mental disorders in adulthood, as well as the risk of comorbidity, associated with school achievement in adolescence. We used population-based cohort data comprising all individuals born in Finland over the period 1980-2000 (N = 1,070,880) who were followed from age 15 or 16 until a diagnosis of mental disorder, emigration, death, or December 2017, whichever came first. Final grade average from comprehensive school was the exposure, and the first diagnosed mental disorder in a secondary healthcare setting was the outcome. The risks were assessed with Cox proportional hazards models, stratified Cox proportional hazard models within strata of full-siblings, and multinomial regression models. The cumulative incidence of mental disorders was estimated using competing risks regression. Better school achievement was associated with a smaller risk of all subsequent mental disorders and comorbidity, except for eating disorders, where better school achievement was associated with a higher risk. The largest associations were observed between school achievement and substance use disorders. Overall, individuals with school achievement more than two standard deviations below average had an absolute risk of 39.6% of a later mental disorder diagnosis. By contrast, for individuals with school achievement more than two standard deviations above average, the absolute risk of a later mental disorder diagnosis was 15.7%. The results show that the largest mental health burden accumulates among those with the poorest school achievement in adolescence.

Learned industriousness as a translational mechanism in anorexia nervosa

It remains unexplained why some behaviours persist despite being non-hedonic and ostensibly aversive. This phenomenon is especially baffling when such behaviours are taken to excess in the form of psychopathology. Anorexia nervosa is one psychiatric disorder in which effortful behaviours that most people find unpleasant (suchas restrictive eating) are persistently performed. We propose thatthe social psychology theory of learned industriousness providesa novel mechanistic account for such phenomena. This theoryposits that high-effort behaviour can be conditioned to acquire secondary reinforcing properties through repeated pairing with reward. Accordingly, effort sensations become less aversive andmore appetitive, increasing willingness to engage in effortful behaviour. In this Perspective, we review pre-clinical behaviouraland biological data that support learned industriousness, contrast learned industriousness with other models of non-hedonic persistence (such as habit learning), highlight evidence that supports learned industriousness in individuals with anorexia nervosa and consider implications of the model, including translation to other psychiatric presentations.

Eating Disorders among Adolescent Female Students in Jeddah, Saudi Arabia

Background

Eating disorders (EDs) are characterised by an abnormal attitude towards food that causes someone to change their eating habits and behaviour. This study aimed to investigate the prevalence of EDs and their associated factors among female going-school adolescents in Jeddah, Saudi Arabia.

Methods

A cross-sectional study was conducted in five schools in Jeddah, Saudi Arabia, among a representative random sample of female adolescent students aged 13 years old-18 years old. A simple random sampling method was used to select the participants. An online self-administered questionnaire, the Arabic version of eating attitude test (EAT-26) and socio-cultural attitudes toward appearance questionnaire (SATAQ-4), was used.

Results

More than half (53.6%) of adolescent girls scored at or above the cut-off point of EAT-26. Around 45% of the participants had experienced family influence on their appearance and body shape, 36.7% had experienced peer influence on these factors, and 49.4% had experienced media influence. Family influence was significantly associated with EDs (P = 0.013).

Conclusion

The high prevalence of EDs among female going-school adolescents in Jeddah, Saudi Arabia, is of great concern. To mitigate this problem, effective programmes must be designed to change their dietary habits while considering the effects of family, peer and media influence, as well as focusing on the importance of eating breakfast and practising physical activity.

Genome-wide association study of school grades identifies genetic overlap between language ability, psychopathology and creativity

Cognitive functions of individuals with psychiatric disorders differ from that of the general population. Such cognitive differences often manifest early in life as differential school performance and have a strong genetic basis. Here we measured genetic predictors of school performance in 30,982 individuals in English, Danish and mathematics via a genome-wide association study (GWAS) and studied their relationship with risk for six major psychiatric disorders. When decomposing the school performance into math and language-specific performances, we observed phenotypically and genetically a strong negative correlation between math performance and risk for most psychiatric disorders. But language performance correlated positively with risk for certain disorders, especially schizophrenia, which we replicate in an independent sample (n = 4547). We also found that the genetic variants relating to increased risk for schizophrenia and better language performance are overrepresented in individuals involved in creative professions (n = 2953) compared to the general population (n = 164,622). The findings together suggest that language ability, creativity and psychopathology might stem from overlapping genetic roots.

Disordered Eating and Body Image Concerns in Young Adult Women With Scoliosis

Background

Researchers have called for more investigation into disordered eating behaviors in females with scoliosis.

Objective

The objective of the current study was to assess the associations between body image concerns, disease-specific indicators of scoliosis (ie, age of diagnosis, having undergone bracing treatment, being told by a physician your scoliosis required surgery, having a spinal fusion), quality of life, and disordered eating in a sample of young adult women diagnosed with idiopathic scoliosis during adolescence.

Design

This study was cross-sectional in design.

Methods

Participants were 177 young adult women ages 18 to 30 years diagnosed with idiopathic scoliosis by a physician who completed questionnaires online.

Results

Undergoing bracing treatment (r = -.440; P < .001), greater age at scoliosis diagnosis (r = .563; P < .001), being told scoliosis required surgery (r = -.196; P < .050), annual income (r = .306; P < .001), level of education (r = .228; P < .010), and race/ethnicity (r = -.213; P < .050) were associated with the EDE-Q Global Score. The Body Shape Questionnaire Total Score and EDE-Q Global Score (r = .848; P < .001) and EDE-Q Weight Concern Score (r = .813; P < .001) were associated. The strongest correlations between the EDE-Q and the SRS-22-Revised Subscales were generally evidenced on the SRS-22-Revised Mental Health Subscale (rs ranged from -.200 to -.371; P < .001). After controlling for annual income, highest level of education, undergoing bracing treatment, and age of scoliosis diagnosis, the Body Shape Questionnaire Total Score was significantly correlated with the EDE-Q Eating Concern Score (standardized beta coefficient = .618; P < .001).

Conclusions

These findings underscore the importance of assessing body image concerns in young adult women with scoliosis experiencing disordered eating as this information may provide valuable information relevant to treatment planning.

Roles of alcohol use disorder and resilience in risk of suicide attempt in men: A Swedish population-based cohort

INTRODUCTION

Alcohol use disorder (AUD) has been identified as a strong risk factor for suicide attempt. However, few studies have considered protective factors that may moderate this association, such as resilience.

METHODS

We used longitudinal nationwide Swedish data of 903,333 males born 1960-1980 and 48,285 males born 1949-1951. We performed Cox proportional hazards models to test the role of AUD, resilience, and their interaction on risk for suicide attempt. We used co-relative models to account for familial factors.

RESULTS

Alcohol use disorder was strongly associated with increased risk of suicide attempt [hazard ratio (HR) = 12.22], while resilience was associated with reduced risk (HR = 0.73). Multiplicative interaction (HR = 1.21) showed that, in the context of AUD, the protective role of resilience on risk of suicide attempt was somewhat attenuated. Co-relative analyses supported both familial liability and a possible causal pathway between AUD, resilience, and suicide attempt. In the cohort born 1949-1951, resilience subcomponents-social maturity, interests, psychological energy, home conditions, and emotional control-were all associated with reduced suicide attempt risk (HRs between 0.63 and 0.74).

CONCLUSION

While resilience is associated with reduced risk of suicide attempt, this effect is less pronounced in the context of AUD. These associations are potentially causal.

Beyond Description and Deficits: How Computational Psychiatry Can Enhance an Understanding of Decision-Making in Anorexia Nervosa

PURPOSE OF REVIEW

Despite decades of research, knowledge of the mechanisms maintaining anorexia nervosa (AN) remains incomplete and clearly effective treatments elusive. Novel theoretical frameworks are needed to advance mechanistic and treatment research for this disorder. Here, we argue the utility of engaging a novel lens that differs from existing perspectives in psychiatry. Specifically, we argue the necessity of expanding beyond two historically common perspectives: (1) the descriptive perspective: the tendency to define mechanisms on the basis of surface characteristics and (2) the deficit perspective: the tendency to search for mechanisms associated with under-functioning of decision-making abilities and related circuity, rather than problems of over-functioning, in psychiatric disorders.

RECENT FINDINGS

Computational psychiatry can provide a novel framework for understanding AN because this approach emphasizes the role of computational misalignments (rather than absolute deficits or excesses) between decision-making strategies and environmental demands as the key factors promoting psychiatric illnesses. Informed by this approach, we argue that AN can be understood as a disorder of excess goal pursuit, maintained by over-engagement, rather than disengagement, of executive functioning strategies and circuits. Emerging evidence suggests that this same computational imbalance may constitute an under-investigated phenotype presenting transdiagnostically across psychiatric disorders. A variety of computational models can be used to further elucidate excess goal pursuit in AN. Most traditional psychiatric treatments do not target excess goal pursuit or associated neurocognitive mechanisms. Thus, targeting at the level of computational dysfunction may provide a new avenue for enhancing treatment for AN and related disorders.

Eater profile and associated factors in pediatric patients of the PEDIANUT cohort

Appetite traits have multifactorial origins. In association with environmental and genetic factors, they could become problematic and lead to Feeding or Eating Disorders (FED). As the DSM-5 classification is not suitable for pediatric FED, another way to describe eating behavior is to distinguish the clinical profiles of "small eater" and "big eater". The aim of this study was to identify socio-demographic and medical factors associated with these profiles, and to compare problematic and non-problematic profiles. From the Pedianut study, we analyzed socio-demographic, medical and family history data among 401 children according to 4 age groups (<1 year n = 101, 1-6 years n = 99, 6-12 years n = 100, 12-18 years n = 101). The information collected on eating behavior made it possible to define small eater profile (SEP) and big eater profile (BEP) using predefined grids. BEP was more frequent in adolescents (35.6%), and SEP was more frequent in children aged 1-6 years (34.3%). BEP was associated with having separated parents, being male and the oldest sibling (p < 0.05). Problematic BEP was associated with eating while watching television, being a girl, and having sensory disorders (p < 0.05). SEP was associated, whatever age, with non-breastfeeding, chronic illness, psychological history, sensory disorders, language delays (in the 1-6 year age group), and family history of FED (in the adolescent group) (p < 0.05). This analysis of factors associated with eater profile opens new perspectives for research on risk factors associated with eating traits, which warrants further study in larger populations to delineate transition from healthy to problematic eating.

Relationships between educational achievement, intelligence, and perfectionism in adolescents with eating disorders

OBJECTIVE

High performance at school is associated with the risk of eating disorders (EDs), and perfectionism is proposed as an explanatory factor for this association. This study aims to evaluate (a) potential discrepancies between the measured IQ of adolescents with EDs and the IQ that is expected given their educational track, and (b) to what extent perfectionism was associated with educational achievement independent from IQ.

METHOD

WISC-III Verbal IQ, Performance IQ, and Full Scale IQ of 386 adolescent ED patients were compared with population norms for their educational track, using one-sample t tests. The association between self-oriented perfectionism (Eating Disorder Inventory-2) and educational achievement, adjusted for IQ, was determined with sequential ordinal regression analyses.

RESULTS

Over 50% of the patients received pre-university education, the most complex educational track. For patients receiving education in the second most complex track, IQ-scores were lower than normative data for that track. For patients receiving pre-university education, the verbal IQ was lower than the norm for that track. Self-oriented perfectionism was associated with educational achievement independent from intelligence.

DISCUSSION

This study suggests that high educational achievement is common in adolescents with EDs. Particularly for patients who receive education in the most complex tracks the demands at school may be higher than they can handle, based on their IQ. Self-oriented perfectionism contributed to educational achievement independent from IQ. Our results indicate that treatment for EDs should include awareness for the possibility of a too high target level of patients at school and perfectionism.

Anorexia nervosa and autism: a prospective twin cohort study

BACKGROUND

Anorexia nervosa (AN) and autism spectrum disorder (ASD) may be phenotypically and etiologically linked. However, due to the absence of prospective studies, it remains unclear whether the elevation of autistic traits in AN is evident in early childhood. Here, we prospectively investigated autistic traits before and after the first diagnosis of AN.

METHODS

In a population-based sample of 5,987 individuals (52.4% female) from the Child and Adolescent Twin Study in Sweden, parents reported autistic traits at ages 9 and 18. AN and ASD diagnoses were retrieved from the Swedish National Patient Register. In addition, AN diagnoses were ascertained by parent-reported treatment for AN. We compared whether individuals with and without AN differed in autistic traits before the first diagnosis of AN (age 9) and after the first diagnosis of AN (age 18).

RESULTS

We did not find evidence for elevated autistic traits in 9-year-old children later diagnosed with AN. At age 18, however, there was a marked elevation in restricted/repetitive behavior and interests, but only in the subgroup of individuals with acute AN. A less pronounced elevation was observed for social communication problems.

CONCLUSIONS

Coping strategies in individuals with ASD and the somewhat different female ASD phenotype may explain why we did not find elevated autistic traits in children who later developed AN. Alternatively, it is possible that elevated autistic traits were not present prior to the onset of AN, thus questioning the previously reported elevated prevalence of ASD in AN. Future studies should use tailored measurements in order to investigate whether autistic traits in individuals with AN are best conceptualized as an epiphenomenon of the acute AN phase or whether these symptoms indeed represent ASD as a clinically verifiable neurodevelopmental disorder.

Exploring mentalizing in adolescents with anorexia nervosa and borderline personality disorder: A comparative study of psychiatric inpatients and healthy controls

Background:

Impaired mentalizing, i.e., difficulties in understanding oneself and others in terms of mental states, has been associated with the development of Anorexia Nervosa (AN), mainly among adults. However, few studies have addressed this question in clinical samples of adolescents with AN. Moreover, no study has explored mentalizing abilities among inpatient adolescents presenting with AN and Borderline Personality Disorder (BPD), despite their high comorbidity in a highly relevant age group.

Objective:

This study attempted, for the first time, to further examine differences in mentalizing abilities and to identify specific mentalizing impairments in different psychiatric inpatient groups and healthy adolescents.

Methods:

Using samples of female adolescents aged 12–17, comparison analyses were performed between psychiatric inpatient adolescents with AN (n = 44), BPD (n = 101), AN+BPD (n = 48), other psychopathology (n = 163) and healthy adolescents (n = 129). Structured and semi-structured clinical interviews, and two experimental tasks were administered to assess AN, BPD and mentalizing, respectively.

Results:

Comparison analyses showed that patients with BPD and other psychiatric disorders evidenced higher levels of hypermentalizing compared to healthy adolescents. Hypermentalizing was also reported among inpatients with AN+BPD, although to a lesser extent. BPD and AN scores were positively correlated with hypermentalizing responses.

Conclusions:

Our results suggest that hypermentalizing is a specific mentalization impairment in inpatient adolescents, particularly with BPD and both AN+BPD. Further investigation into the efficacy of mentalization based treatments for adolescents with BPD and AN+BPD is recommended. Prospective studies are needed to assess mentalizing using experimental tasks among adolescents with AN, taking into account the potential influence of temporality and severity of the disorders’ symptoms.

Moving towards specificity: A systematic review of cue features associated with reward and punishment in anorexia nervosa

Models of anorexia nervosa (AN) posit that symptoms are maintained through deficient reward and enhanced punishment processing. However, theoretical and empirical inconsistencies highlight the need for a more nuanced conceptualization of this literature. Our goal was to comprehensively review the research on reward and punishment responding in AN from a cue-specific lens to determine which stimuli evoke or discourage reward and punishment responses in this population, and, ultimately, what properties these rewarding and punishing cues might share. A systematic review interrogating reward and punishment responses to specific cues yielded articles (n = 92) that examined responses to disorder relevant (e.g., food) and irrelevant (e.g., money) stimuli across self-report, behavioral, and biological indices. Overall, in most studies individuals with AN exhibited aversive responses to cues signaling higher body weights, social contexts, and monetary losses, and appetitive responses to cues for weight loss behaviors and thinness. Findings were more mixed on responses to palatable food and monetary gains. Results highlight that reward and punishment responding in AN are context specific and may be affected by varied stimulus qualities (e.g., predictability, controllability, delay, effort). Increasing specificity in future research on reward and punishment mechanisms in AN will better inform development of precisely-targeted interventions.

Validation of a childhood eating disorder outcome scale

We developed and validated a childhood eating disorder outcome scale based on outcomes associated with body mass index standard deviation score (BMI-SDS). This prospective observational study included 131 children with eating disorders (aged 5-15 years). Participants' outcomes scales were completed at the first visit and at 1, 3, 6, and 12 months. The scale evaluated 12 outcomes: body weight change (BW), eating attitude (EA), fear of being fat (FF), body image distortion (BD), menstruation (ME), perceived physical condition (PC), attending school (AS), disease recognition by school (RS), family function (FA), disease recognition by parent (RP), social adaptation (SA), and relationships with friends (RF). Responses to all items were on a four-point Likert scale. Exploratory factor analysis was used to determine the number of factors based on the 12 outcomes. The relation between outcome scale scores and BMI-SDS over the 12-month follow-up period was analyzed. Two types of factors were extracted: disease-specific factors (EA, FF, BD) and biopsychosocial factors (BW, PC, AS, FA, SA, RF). Three items (ME, RS, RP) were excluded because they showed no significant loading effect. There was a significant negative correlation between the outcome scale and BMI-SDS, and changes in outcome scale scores from baseline to 12 months were significantly associated with improvement in BMI-SDS. We developed a childhood eating disorder outcome scale characterized by disease-specific and biopsychosocial factors. Biopsychosocial management combined with a therapeutic approach for disease-specific symptoms may support body weight recovery for children with eating disorders.

Disaggregating the predictive effects of impaired psychosocial functioning on future DSM-5 eating disorder onset in high-risk female adolescents

OBJECTIVE

Impaired psychosocial functioning previously emerged as the only risk factor to predict future onset of each of the four Diagnostic and Statistical Manual of Mental Disorder (5th ed.) (DSM-5) eating disorders. The goal of this follow-up report was to refine understanding of this newly identified risk factor.

METHOD

Combining data from women at risk for eating disorders because of body image concerns (N = 1,153, mean age = 18.5 years, SD = 4.2), we investigated which subdomain(s) and individual item(s) of psychosocial functioning (friends, family, school, and work) at baseline predicted onset of any eating disorder, using Cox regression (CRA) and classification tree analysis (CTA).

RESULTS

Psychosocial impairment with friends, family, and at school, but not at work, significantly increased risk for disorder onset over 3-year follow-up in univariate models. A one-unit increase in each domain raw score was associated with a 107, 22, and 43% increased hazard of eating disorder onset, respectively. Multivariate CRA found friends functioning, with a 92% increased hazard of disorder onset, contributed the strongest unique effect. CTA suggested that loneliness was the most potent risk factor with a threefold increased onset risk (eating disorder incidence for high vs. low scorers was 27 and 8%). Three friends functioning items and one school functioning item produced additional CTA branches.

DISCUSSION

Results refine understanding of the relation of psychosocial impairment to future onset of eating disorders, suggesting that peer functioning is the most critical. Data imply it would be useful to target young women with impaired psychosocial functioning in prevention programs.

The joint impact of cognitive performance in adolescence and familial cognitive aptitude on risk for major psychiatric disorders: a delineation of four potential pathways to illness

How do joint measures of premorbid cognitive ability and familial cognitive aptitude (FCA) reflect risk for a diversity of psychiatric and substance use disorders? To address this question, we examined, using Cox models, the predictive effects of school achievement (SA) measured at age 16 and FCA-assessed from SA in siblings and cousins, and educational attainment in parents-on risk for 12 major psychiatric syndromes in 1 140 608 Swedes born 1972-1990. Four developmental patterns emerged. In the first, risk was predicted jointly by low levels of SA and high levels of FCA-that is a level of SA lower than would be predicted from the FCA. This pattern was strongest in autism spectrum disorders and schizophrenia, and weakest in bipolar illness. In these disorders, a pathologic process seems to have caused cognitive functioning to fall substantially short of familial potential. In the second pattern, seen in the internalizing conditions of major depression and anxiety disorders, risk was associated with low SA but was unrelated to FCA. Externalizing disorders-drug abuse and alcohol use disorders-demonstrated the third pattern, in which risk was predicted jointly by low SA and low FCA. The fourth pattern, seen in eating disorders, was directly opposite of that observed in externalizing disorders with risk associated with high SA and high FCA. When measured together, adolescent cognitive ability and FCA identified four developmental patterns leading to diverse psychiatric disorders. The value of cognitive assessments in psychiatric research can be substantially increased by also evaluating familial cognitive potential.

First Sociodemographic, Pretreatment and Clinical Data from a German Web-Based Registry for Child and Adolescent Anorexia Nervosa

Abstract. Objective: The first web-based registry for childhood and adolescent anorexia nervosa (AN) in Germany was established to systematically collect demographic and clinical data. These data as well as information on how young individuals with AN can find access to healthcare services are presented. Method: Patients´ data from child and adolescent psychiatry departments of 12 university hospitals and two major nonuniversity hospitals in Germany were collected between January 2015 and December 2016. All patients met the ICD-10 diagnostic criteria for (atypical) AN. Sociodemographic data, type and amount of healthcare utilization before admission, and clinical data at admission and discharge were compiled. Results: 258 patients with a mean age of 14.7 years and a mean BMI at admission of 15.3 kg/m2 were included. The parents and patients had a higher educational level than the general German population. More than 80 % of the patients reported having utilized healthcare before hospitalization. The mean duration of outpatient treatment before hospitalization was 7 months. Conclusions: There seem to be major barriers to specialist treatment for young patients with AN in Germany, which should be analyzed in future studies.

NR2A- and NR2B-NMDA receptors and drebrin within postsynaptic spines of the hippocampus correlate with hunger-evoked exercise

Hunger evokes foraging. This innate response can be quantified as voluntary wheel running following food restriction (FR). Paradoxically, imposing severe FR evokes voluntary FR, as some animals choose to run rather than eat, even during limited periods of food availability. This phenomenon, called activity-based anorexia (ABA), has been used to identify brain changes associated with FR and excessive exercise (EX), two core symptoms of anorexia nervosa (AN), and to explore neurobiological bases of AN vulnerability. Previously, we showed a strong positive correlation between suppression of FR-evoked hyperactivity, i.e., ABA resilience, and levels of extra-synaptic GABA receptors in stratum radiatum (SR) of hippocampal CA1. Here, we tested for the converse: whether animals with enhanced expression of NMDA receptors (NMDARs) exhibit greater levels of FR-evoked hyperactivity, i.e., ABA vulnerability. Four groups of animals were assessed for NMDAR levels at CA1 spines: (1) ABA, in which 4 days of FR was combined with wheel access to allow voluntary EX; (2) FR only; (3) EX only; and (4) control (CON) that experienced neither EX nor FR. Electron microscopy revealed that synaptic NR2A-NMDARs and NR2B-NMDARs levels are significantly elevated, relative to CONs'. Individuals' ABA severity, based on weight loss, correlated with synaptic NR2B-NMDAR levels. ABA resilience, quantified as suppression of hyperactivity, correlated strongly with reserve pools of NR2A-NMDARs in spine cytoplasm. NR2A- and NR2B-NMDAR measurements correlated with spinous prevalence of an F-actin binding protein, drebrin, suggesting that drebrin enables insertion of NR2B-NMDAR to and retention of NR2A-NMDARs away from synaptic membranes, together influencing ABA vulnerability.

Common adult psychiatric disorders in Swedish primary care where most mental health patients are treated

BACKGROUND

The overall aim of this study is to present descriptive data regarding the treated prevalence of nine common psychiatric and substance use disorders in the first Primary Care Registry (PCR) in Sweden: Major Depression (MD), Anxiety Disorders (AD), Obsessive-Compulsive Disorder (OCD), Adjustment Disorder (AdjD), Eating Disorders (ED), Personality Disorder (PD), Attention Deficit Hyperactivity Disorder (ADHD), Alcohol Use Disorder (AUD) and Drug Abuse (DA).

METHOD

We selected 5,397,675 individuals aged ≥18. We examined patterns of comorbidity among these disorders and explored the association between diagnoses in the PCR and diagnoses obtained from Hospital and Specialist care. We explored the proportion of patients with these nine disorders that are only treated in primary health care.

RESULTS

For four of our disorders, 80% or more of the cases were present only in the PCR: AdjD, DA, AD and MD. For two disorders (OCD and ED), 65-70% of cases were only found in the PCR. For three disorders (PD, AUD, and ADHD), 45-55% of the patients were only present in the PCR.

CONCLUSION

The PCR will, in the future, likely prove to be an important tool for studies in psychiatric epidemiology.

Genetic epidemiology of eating disorders

PURPOSE OF REVIEW

We capture recent findings in the field of genetic epidemiology of eating disorders. As analytic techniques evolve for twin, population, and molecular genetic studies, new findings emerge at an accelerated pace. We present the current status of knowledge regarding the role of genetic and environmental factors that influence risk for eating disorders.

RECENT FINDINGS

We focus on novel findings from twin studies, population studies using genetically informative designs, and molecular genetic studies. Over the past 2 years, research in this area has yielded insights into: comorbidity with other psychiatric and medical disorders and with metabolic traits; developmental factors associated with the emergence of eating disorders; and the molecular genetics of anorexia nervosa.

SUMMARY

Insights from genetic epidemiology provide an important explanatory model for patients with eating disorders, family members, and clinicians. Understanding core biological determinants that explain the severity and persistence of the illnesses, their frequent co-occurrence with other conditions, and their familial patterns raises awareness and increases compassion for individuals living with these disorders. Large-scale genomic studies are currently underway. Ultimately, this domain of research may pave the way to greater understanding of the underlying neurobiology and inform the development of novel and effective interventions.