Prevalence and comorbidity of eating disorders among a community sample of adolescents: 2-year follow-up

A systematic review and meta-analysis on the prevalence of mental disorders among children and adolescents in Europe

Most mental disorders appear by age 14, but in most cases, they remain undiagnosed and untreated well into adulthood. A scoping review showed an absence of systematic reviews that address prevalence rates of mental disorders among children and adolescents in Europe that are based on community studies conducted between 2015 and 2020. To estimate the updated pooled prevalence of Anxiety Disorder, Depressive Disorder, Attention Deficit Hyperactivity Disorder (ADHD), Conduct Disorder (CD), Oppositional Defiant Disorder (ODD), Autism Spectrum Disorder, Eating Disorders, Substance Use Disorders (SUD), among children and adolescents living in Europe, a search strategy was conducted using MEDLINE, Embase and Psych Info and studies were also identified from reference lists and gray literature. Eligible studies were evaluated for reliability, validity, and bias. Trends of prevalence rates for each mental disorder were calculated. Almost one in five young people in Europe were found to suffer from a mental disorder, with a pooled prevalence rate of 15.5%. Anxiety disorders had the highest pooled prevalence rate (7.9% (95% CI 5.1-11.8%, I2: 98.0%)), followed by ADHD (2.9% (95% CI 1.2-6.9%, I2 = 94.3%)), ODD (1.9% (95% CI 1.0-3.7%, I2 = 98.4%)), depressive disorder (1.7% (95% CI 1.0-2.9%, I2 = 97.7%)), CD (1.5% (95% CI 0.6-3.8%, I2 = 98.8%)) and ASD (1.4% (95% CI 0.4-5.4%, I2 = 99.7%). No studies on SUD were identified. The mental health of children and adolescents may be improved by introducing routine screening, refining diagnostic sensitivity, raising awareness of mental disorders, minimizing stigma and socioeconomic inequality, as well as developing early intervention services. These facilitators of good mental health need to be prioritized, especially at a time of unprecedented risk factors for poor mental health.

Influence of the COVID-19 pandemic on the incidence of eating disorders

INTRODUCTION

Eating disorders (EDs) develop more frequently in young females. Following the COVID-19 pandemic, there has been evidence of an increase in children and adolescents, with an earlier onset and a worse body weight and nutritional status. The aim of this study was to determine whether this trend has also been observed in our region over the past 6 years.

MATERIAL AND METHODS

We conducted a retrospective and descriptive cohort study in paediatric patients with a diagnosis of ED, referred during the 3 years preceding and following the declaration of the state of alarm due to the pandemic. We analysed and compared clinical, anthropometric and laboratory variables and bioelectrical impedance and bone density data.

RESULTS

Of the 129 patients in the sample, 28 were referred before the lockdown period and 101 after. When we compared these groups, we found a longer time elapsed from onset to the initial assessment (mean delay, 11.87 [SD, 6.75] vs. 6.64 [SD, 4.36] months), a greater hospitalization rate (14.1% vs. 10.1%), and lower vitamin D values (mean level, 28.19 [SD, 9.95] vs. 34.39 [SD, 11.87] ng/mL) in the post-lockdown group. We also found a greater frequency of self-harm suicide attempts in these patients.

CONCLUSIONS

This study confirms the increasing trend in EDs in children and adolescents in our area. Moreover, we found differences in the clinical characteristics and time elapsed to diagnosis compared to the patients referred to the hospital before the pandemic.

A Scoping Review of the Prevalence of Eating Disorders in Spain

INTRODUCTION

Eating disorders (EDs) are mental health illnesses with a multifactorial origin. At present, no review of indexed publications studying their prevalence in Spain is available.

MATERIAL AND METHODS

A scoping review (PROSPERO -CRD42019140884-) was carried out through systematic searches (MEDLINE, EMBASE and PsycINFO) until January 2022. Papers published in Spanish/English analysing the prevalence of EDs in Spain (population < 65 years) were selected.

RESULTS

A total of 766 articles were identified (186 eliminated as duplicates). A total of 580 articles were analysed on the basis of title and abstract, and 67 articles were selected for full-text analysis. A total of 37 studies analysed the prevalence of EDs in Spain.

CONCLUSIONS

This is the first scoping review to analyse the prevalence of EDs in Spain. Puberty and adolescence are the most extensively studied stages. There is a high heterogeneity in the use of ED screening tools and a paucity of information on diagnostic tools.

Undetected eating disorders among adolescent psychiatric inpatients

AIM

The aim of this study was to identify the prevalence of undetected eating disorders (EDs) among adolescent psychiatric inpatients and to investigate the association between clinical, psychiatric, and sociocultural factors and EDs.

METHODS

Between January and December 2018, patients aged 12-18 years, hospitalized for inpatient-level treatment were given the self-assessment questionnaires of the Eating Attitudes Test-26 (EAT-26), the Contour Drawing Figure Rating Scale (CDFRS), the Child Behaviour Check List, and Sociocultural Attitudes Toward Appearance Questionnaire-4 after their routine unstructured clinical diagnostic assessment on admission by a psychiatrist. Patients were reassessed after reviewing the psychometric assessment results.

RESULTS

The prevalence of EDs among 117 psychiatric inpatients was 9.4%, all were female and all diagnosed with unspecified feeding and eating disorder. We showed that 63.6% of patients with EDs was diagnosed after the screening and not with the routine clinical interview. EAT-26 scores were weakly correlated with affective (r = 0.314, p = .001), anxious (r = 0.231, p = .012), somatic (r = 0.258, p = .005), and impulsive maladaptive behaviours (r = 0.272, p = .003). A formal ED diagnosis was positively associated with media pressure, (OR:1.660, 95% CI: 1.105-2.495) and oppositional defiance (OR: 1.391, 95% CI: 1.005-1.926), and negatively with conduct problems (OR: 0.695, 95% CI: 0.500-0.964). The CDFRS results were not different between the ED and non-ED groups.

CONCLUSIONS

Our study suggests EDs remain a prevalent yet often overlooked diagnosis in adolescent psychiatric inpatients. Health care providers should screen for EDs in inpatient psychiatric settings as a part of routine assessment to improve the identification of disordered eating behaviours that often begin during adolescence.

Family-based treatment takes longer for adolescents with mental health comorbidities: findings from a community mental health service

Children and adolescents diagnosed with an eating disorder often meet the diagnosis of another mental health disorder. In addition to eating disorders, individuals with comorbid disorders have higher suicide rates and more severe and chronic eating disorder symptoms. The present research aimed to investigate the influence of comorbid conditions on the treatment outcomes of children and adolescents that attended a public community mental health service. It was hypothesised that the patients with comorbidities would have a more extended treatment duration, slower rates of weight restoration, more hospital admissions for medical compromise, and poorer functioning than those without comorbidities. Data from 78 past patients at the Eating Disorder Program in Queensland, Australia, were analysed. Patients with comorbidities demonstrated similar recovery rates to those without comorbidities. However, those with comorbid conditions had longer episodes of treatment. The study's results support using Family Based Treatment for patients with and without comorbidities. The implications of the findings for public mental health services and directions for future research are discussed.

Beyond generalized anxiety: the association of anxiety sensitivity with disordered eating

BACKGROUND

Anxiety and eating disorders (EDs) are rising at alarming rates. These mental health disorders are often comorbid, yet the factors associated with their comorbidity are not well understood. The present study examined a theoretical model of the pathways and relative associations of anxiety sensitivity (AS) with different dimensions of ED risk, controlling for generalized anxiety.

METHODS

Participants (N = 795) were undergraduate students with an average age of 21 (SD = 4.02), predominantly female (71%), and Hispanic (71.8%). Participants completed an online survey with established measures of AS (i.e., Anxiety Sensitivity Index-3; ASI-3), general anxiety (i.e., Beck Anxiety Inventory; BAI), and eating behaviors (i.e., Eating Attitudes Test-26; EAT-26).

RESULTS

The results of our structural equation models indicated that AS subscales were significantly associated with dimensions of the EAT-26, even when controlling for generalized anxiety. Specifically, the ASI-3 factors reflecting cognitive and social concerns provided the most consistent significant associations with EDs. Whereas reporting higher cognitive concerns was associated with higher ED symptoms (e.g., reporting the urge to vomit after a meal), reporting higher social concerns was associated with fewer ED symptoms. These differential results may suggest risk and resilience pathways and potential protective or buffering effects of social concerns on ED risk.

DISCUSSION

Findings advance understanding of the role of AS in the comorbidity of anxiety and EDs, demonstrating the strong association of AS with ED pathology. These findings provide cognitive indicators for transdiagnostic therapeutic intervention in order to reduce the risk of EDs.

Predictors for and duration of hospitalization among children and adolescents with eating disorders

OBJECTIVE

The objective of this study was to investigate the predictive value of sex, age, body mass index (BMI), Eating Disorder Examination (EDE) score, social risk factors, and psychiatric comorbidities for hospitalization and hospitalization duration among children and adolescents suffering from eating disorders.

METHOD

This prospective cohort study involved 522 consecutive patients who had been referred to a specialized eating disorder unit between January 1, 2009 and December 31, 2015; participants were followed up until August 1, 2016 by medical records. We used regression analyses to evaluate the prognostic value of sex, age, BMI, EDE, eating disorder diagnoses, social risk factors, and psychiatric comorbidities concerning inpatient hospitalization and hospitalization duration.

RESULTS

We found that younger age, higher EDE global score, lower BMI percentile, anorexia nervosa, a higher number of social risk factors, and the presence of diagnosed self-harm increased the odds of being hospitalized, while being female and having a comorbid autism spectrum condition increased the duration of hospitalization. No other psychiatric comorbidity was found to significantly predict hospitalization or duration of hospitalization.

DISCUSSION

The odds of being hospitalized were predicted by the severity of anorexia nervosa and indicators of social risk factors in the family, whereas the duration of hospitalization was predicted by having a comorbid autism spectrum condition, indicating a difference between the factors affecting the risk of hospitalization and the factors affecting the duration of hospitalization. This calls for further exploration of tailored treatments for eating disorders.

PUBLIC SIGNIFICANCE STATEMENT

This study finds that hospitalization for an eating disorder is predicted by the severity of the illness, self-harm, and social risk factors. Duration of hospitalization is predicted by having a comorbid autism spectrum condition. These findings indicate that the treatment of eating disorders may require different treatment approaches depending on the presentation of the individual patient to reduce both the need for hospitalization and the length of inpatient stay.

The impact of floatation therapy on body image and anxiety in anorexia nervosa: a randomised clinical efficacy trial

Background

Body image disturbance and anxiety are core features of anorexia nervosa (AN), a psychiatric disorder with one of the highest mortality rates. This study examined the efficacy of a novel non-pharmacological treatment, floatation-REST (Reduced Environmental Stimulation Therapy) on body image disturbance and anxiety in inpatients with AN.

Methods

This parallel group randomised controlled trial compared floatation-REST vs. care as usual in women and girls hospitalised for treatment of AN in Tulsa, Oklahoma, USA. Participants were randomised on a 2:1 ratio to receive eight, twice-weekly, 60-min floatation-REST sessions for 4 weeks, in addition to care as usual, or to receive care as usual. The primary outcome was the average change in body dissatisfaction from pre- to post-float as measured by the Photographic Figure Rating Scale. The secondary outcome was the average change in anxiety from pre- to post-float as measured by the state version of the State Trait Anxiety Inventory. Longitudinal effects of floatation-REST on body dissatisfaction were also examined. All analyses were conducted using the intention-to-treat principle. Planned linear mixed models tested the effect of floatation-REST vs. care as usual. The trial was preregistered (clinicaltrials.govNCT03610451).

Findings

Between March 16, 2018 and February 25, 2021, 133 participants were screened for eligibility, and 86 were consented. Eighteen were excluded after consent, for a final randomisation sample of 68 participants (45 floatation-REST; 23 care as usual). There were two session by condition interactions on body dissatisfaction (p = 0.00026) and state anxiety (p < 0.0001), such that the floatation-REST group exhibited acute (i.e., pre- to post-session) reductions in body dissatisfaction (floatation-REST group mean change (Δm) = -0.43; 95% CI -0.56 to -0.30, p < 0.0001, Cohen's d = 0.23), and acute reductions in anxiety (floatation-REST group Δm = -15.75; 95% CI -17.95 to -13.56, p < 0.0001, Cohen's d = 1.52); however, the care as usual group exhibited no significant changes. With regard to longitudinal results, there was a significant time by treatment interaction between baseline and immediately post intervention (p = 0.012) and baseline and six-month follow up (p = 0.0019). At immediately post intervention, there was a trending reduction in body dissatisfaction for the floatation-REST group (Δm = -0.41, 95% CI -0.86 to 0.03, p = 0.068) and care as usual group (Δm = 0.61; 95% CI -0.04 to 1.27, p = 0.070). At six-months post-intervention, the floatation-REST group exhibited lower body dissatisfaction (Δm = -0.91; 95% CI -1.37 to -0.45, p = 0.0020, Cohen's d = 0.53) whereas the care as usual group reported no change in body dissatisfaction (Δm = 0.35; 95% CI -0.28 to 0.98, p = 0.96) relative to baseline. There were no adverse events related to the trial during the study.

Interpretation

Our findings suggest that Floatation-REST decreased body dissatisfaction compared to care as usual acutely after each float session and at six-month follow-up. Floatation-REST has potential utility for the treatment of body image disturbance and anxiety in AN. These results may be limited by some generalisability concerns given the recruitment of a modest sample receiving inpatient treatment at a single site.

Funding

The William K. Warren Foundation.

Prevalence of probable eating disorders and associated risk factors: An analysis of the Northern Ireland Youth Wellbeing Survey using the SCOFF

OBJECTIVES

Eating disorders (ED) are associated with significant morbidity and mortality rates and are most common in young people aged between 15 and 19 years. Large representative surveys on disordered eating in youth are lacking. The main aims were to estimate the prevalence of disordered eating in a representative sample of 11-19 year olds in Northern Ireland and investigate the associations between probable eating disorder and a range of risk factors.

DESIGNS AND METHODS

A large nationally representative household survey was conducted, and the bivariate and multivariate associations between demographic, familial, economic and psychological risk factors and probable eating disorder were assessed.

RESULTS

A total of 16.2% (n = 211) of the sample met the SCOFF screening criteria for disordered eating. Probable eating disorder was associated with being female (OR = 2.44), having a parent with mental health problems (OR = 1.68), suffering from certain psychological problems, such as mood or anxiety disorder (OR = 2.55), social media disorder (OR = 2.95), being the victim of physical bullying (OR = 1.71) and having smoked (OR = 2.46).

CONCLUSIONS

This study provides the first prevalence estimates of probable eating disorder among youth in Northern Ireland. Furthermore, the study identifies unique risk factors for probable eating disorder among this representative sample.

Risk factors for eating disorders: findings from a rapid review

BACKGROUND

Risk factors represent a range of complex variables associated with the onset, development, and course of eating disorders. Understanding these risk factors is vital for the refinement of aetiological models, which may inform the development of targeted, evidence-based prevention, early intervention, and treatment programs. This Rapid Review aimed to identify and summarise research studies conducted within the last 12 years, focusing on risk factors associated with eating disorders.

METHODS

The current review forms part of a series of Rapid Reviews to be published in a special issue in the Journal of Eating Disorders, funded by the Australian Government to inform the development of the National Eating Disorder Research and Translation Strategy 2021-2031. Three databases were searched for studies published between 2009 and 2021, published in English, and comprising high-level evidence studies (meta-analyses, systematic reviews, moderately sized randomised controlled studies, moderately sized controlled-cohort studies, or population studies). Data pertaining to risk factors for eating disorders were synthesised and outlined in the current paper.

RESULTS

A total of 284 studies were included. The findings were divided into nine main categories: (1) genetics, (2) gastrointestinal microbiota and autoimmune reactions, (3) childhood and early adolescent exposures, (4) personality traits and comorbid mental health conditions, (5) gender, (6) socio-economic status, (7) ethnic minority, (8) body image and social influence, and (9) elite sports. A substantial amount of research exists supporting the role of inherited genetic risk in the development of eating disorders, with biological risk factors, such as the role of gut microbiota in dysregulation of appetite, an area of emerging evidence. Abuse, trauma and childhood obesity are strongly linked to eating disorders, however less conclusive evidence exists regarding developmental factors such as role of in-utero exposure to hormones. Comorbidities between eating disorders and mental health disorders, including personality and mood disorders, have been found to increase the severity of eating disorder symptomatology. Higher education attainment, body image-related factors, and use of appearance-focused social media are also associated with increased risk of eating disorder symptoms.

CONCLUSION

Eating disorders are associated with multiple risk factors. An extensive amount of research has been conducted in the field; however, further studies are required to assess the causal nature of the risk factors identified in the current review. This will assist in understanding the sequelae of eating disorder development and in turn allow for enhancement of existing interventions and ultimately improved outcomes for individuals.

Associations between inattention and impulsivity ADHD symptoms and disordered eating risk in a community sample of young adults

BACKGROUND

Symptoms of attention deficit hyperactivity disorder (ADHD) and trait impulsivity have been associated with disordered eating but are seldom assessed in community studies, or longitudinally and little is known about the mediating mechanisms.

METHODS

We tested associations between ADHD symptoms and disordered eating cross-sectionally and between trait impulsivity and disordered eating longitudinally. We utilised data from a normative cohort of young adults (642 participants: 65% female, M_age = 23 years). Participants were classified as high risk or low risk for disordered eating using the SCOFF instrument. In the first two steps of both cross-sectional and longitudinal hierarchical logistic regression models, demographics and covariates were entered. For the cross-sectional regression, Adult ADHD self-report scale (ASRS) scores, separated into inattentive and hyperactive/impulsive symptoms, were entered in the third step. In a separate longitudinal model, Barratt impulsivity scale subscales (attentional, motor and non-planning impulsivity) were entered in the third step. Depression, as assessed by the moods and feelings questionnaire (MFQ), was examined as a mediator.

RESULTS

Cross-sectionally, sex, MFQ score and inattentive symptoms predicted disordered eating risk (model R² = 20%). Longitudinally, sex, MFQ score and attentional impulsivity predicted disordered eating risk (model R² = 16%). The relationship between inattentive symptoms and the disordered eating risk was partially mediated by MFQ score, whereas the relationship between attentional impulsivity and the disordered eating risk was fully mediated by MFQ scores.

CONCLUSIONS

These data highlight (1) a specific role for inattentive symptoms of ADHD and (2) the importance of both depression and impulsivity in predicting eating disorder risk.

Emotion Dysregulation and Eating Disorder Symptoms: Examining Distinct Associations and Interactions in Adolescents

Emotion dysregulation has been posited as a key transdiagnostic factor of mental health difficulties, including eating disorders. However, how this transdiagnostic factor interacts with the disorder-specific factor of weight and shape concerns remains unclear. The current study examined whether emotion dysregulation is associated with eating disorder behaviors over and above the association between weight and shape concerns and whether these two factors interacted. The current study used data from two samples, a community sample of high school students (n = 2699), and a clinical sample of adolescents receiving outpatient treatment for an eating disorder (n = 149). Participants completed self-report measures on their eating behaviors, weight/shape concerns, and emotion dysregulation. Findings showed that emotion dysregulation had a unique association with engaging in binge eating and purging (community sample only). Weight and shape concerns were found to have a unique association with engaging in binge eating, fasting, purging, and driven exercise (community sample only). Additionally, weight and shape concerns moderated the association between emotion dysregulation and the probability of engaging in binge eating and driven exercise, whereby the strongest association between emotion dysregulation and these behaviors were observed among adolescents with the lowest levels of weight and shape concerns. Regarding the frequency of eating disorder behaviors, emotion dysregulation had a unique association with severity of binge eating and fasting. Weight and shape concerns were uniquely associated with severity of fasting and driven exercise (community sample only). Findings suggest that emotion dysregulation is a distinct factor of eating disorder behaviors among adolescents.

Prevalence and early risk factors for bulimia nervosa symptoms in inner-city youth: gender and ethnicity perspectives

BACKGROUND

Research on risk factors associated with bulimia nervosa symptoms (BN) in ethnic minorities has been limited. This study adds to the existing literature by providing the ethnicity- and gender-specific prevalence of BN in US inner-city youth and by exploring the longitudinal associations between a clinical level of BN and early risk factors assessed one year previously.

METHODS

The study was conducted on a representative sample of predominantly ethnic minority youth (N = 2794; 54.1% female; age 11-16 years old (M(SD) = 12.77(1.29)); 60.0% African-American, 26.1% Hispanic American, 13.9% White). Self-reported information was obtained on BN and early risk factors (e.g., depressive and anxiety symptoms, posttraumatic stress, somatic complaints). Multivariate analysis of covariance was used to examine the longitudinal associations.

RESULTS

The 3-month BN prevalence was higher in girls (5.1%) than in boys (2.3%) (ratio 2.22:1). Significant differences in BN rates were found between White and African American students (higher in Whites), whereas Hispanic-Americans did not differ significantly from either group. Individuals with BN had significantly higher levels of early risk factors one year prior.

CONCLUSIONS

Timely recognition of BN and associated early risk factors is important for early prevention and intervention strategies.

Comorbid obsessive-compulsive disorder in individuals with eating disorders: An epidemiological meta-analysis

The present study aimed to provide a precise, meta-analytic estimate of the prevalence of obsessive-compulsive disorder (OCD) amongst those with a current primary eating disorder (ED) diagnosis, and to isolate its predictors. An online search of PubMed and PsycINFO was conducted with a Boolean search phrase incorporating keywords related to OCD, EDs, comorbidity, prevalence, and epidemiology, complemented by references coded from related review articles and contact with experts in the field. Articles were included if they (a) reported an observational study examining current ED diagnoses, (b) used a semi-structured or structured diagnostic interview for OCD and ED diagnosis, (c) applied DSM or ICD criteria, (d) included adolescent or adult samples (age > 12), (e) included patient or community samples, and (f) reported lifetime or current OCD comorbidity. From the 846 articles identified, 35 lifetime and 42 current estimates were calculated. OCD prevalence was extracted from each study for each ED diagnostic category, along with eleven additional potential moderators. Analyses revealed an aggregate lifetime OCD prevalence of 13.9% CI_95% [10.4 to 18.1] and current OCD prevalence of 8.7% CI_95% [5.8 to 11.8] across EDs. Moderator analyses revealed the prevalence of and risk for OCD in EDs to be greatest in anorexia nervosa binge-eating purging type (ANBP). Further, OCD is most prevalent amongst patient samples than samples recruited from the community.

How precisely can psychotherapists predict the long-term outcome of anorexia nervosa and bulimia nervosa at the end of inpatient treatment?

OBJECTIVE

To assess the ability of psychotherapists to predict the future outcome for inpatients with anorexia nervosa (AN) and bulimia nervosa (BN).

METHOD

Psychotherapists rated the prognosis of the patient's eating disorder on a five point Likert scale on several dimensions at the end of inpatient treatment. Actual outcome was assessed about 10 years after treatment. The sample comprised 1,065 patients treated for AN, and 1,192 patients treated for BN.

RESULTS

Psychotherapists' rating of their patient's prognosis was not better than chance for good outcome in AN and BN and for poor outcome in BN. Prediction of poor outcome in AN was somewhat better with approximately two thirds of correct predictions. In logistic regression analysis, psychotherapists' rating of the patients' prognosis for AN contributed to the explained variance of long-term outcome, increasing the variance explained from 7% (by conventional predictors) to 8% after including psychotherapists' prognosis. In BN, there was no significant contribution of psychotherapists' prognosis to overall prediction.

DISCUSSION

Our current knowledge of risk and protective factors for the course of eating disorders is unsatisfying. More specialized research is urgently needed.

Increased rates of eating disorders and their symptoms in women with major depressive disorder and anxiety disorders

BACKGROUND

Individuals with eating disorders (EDs) have increased rates of major depressive disorder (MDD) and anxiety disorders. Yet, few studies have investigated rates of EDs and their symptoms in individuals presenting with MDD/anxiety disorders. Identifying potential disordered eating in people with MDD/anxiety disorders is important because even subclinical disordered eating is associated with reduced quality of life, and undiagnosed eating pathology may hinder treatment progress for both MDD/anxiety disorders and comorbid EDs.

METHOD

We compared rates of EDs (anorexia nervosa, bulimia nervosa, binge-eating disorder, and other specified feeding and eating disorders) and their symptoms in 130 women with, and 405 women without, lifetime MDD or an anxiety disorder (generalized anxiety disorder, obsessive-compulsive disorder, social phobia, specific phobia, panic disorder, agoraphobia, or post-traumatic stress disorder) recruited from the population-based Michigan State University Twin Registry. Lifetime ED and MDD/anxiety diagnoses, and lifetime clinically significant disordered eating behaviors (e.g., binge eating, excessive exercise) were assessed using the Structured Clinical Interview for DSM-IV (SCID).

RESULTS

Among participants with lifetime MDD or any anxiety disorder, 13% met criteria for a lifetime ED and 39% reported engaging in at least one lifetime clinically significant disordered eating behavior (e.g., binge eating) on the SCID. In contrast, only 3% of participants without a history of MDD/an anxiety disorder met criteria for a lifetime ED, and only 11% reported lifetime clinically significant disordered eating behavior.

DISCUSSION

Our findings suggest that women with MDD and anxiety disorders have elevated rates of EDs, and it is therefore imperative to screen for disordered eating in these populations.

Longitudinal Associations between Coping Strategies and Psychopathology in Pre-adolescence

Much of the literature investigating the association between coping and psychopathology is cross-sectional, or associations have been investigated in a unidirectional manner; hence, bidirectionality between coping and psychopathology remains largely untested. To address this gap, this study investigated bidirectional relations between coping and psychopathology during pre-adolescence. Participants (N = 532, 51% male) and their primary caregiver both completed questionnaires assessing pre-adolescents' coping (i.e., avoidant, problem solving, social support seeking) and symptoms of psychopathology (i.e., generalized anxiety, social anxiety, depression, eating pathology) in Wave 1 (M_age = 11.18 years, SD = 0.56, range = 10-12) and Wave 2 (M_age = 12.18 years, SD = 0.53, range = 11-13, 52% male), one year later. Cross-lagged panel models showed child-reported avoidant coping predicted increases in symptoms of generalized and social anxiety, and eating pathology. In separate child and parent models, symptoms of depression predicted increases in avoidant coping. Greater parent-reported child depressive symptoms also predicted decreases in problem solving coping. Taken together, results suggest unique longitudinal associations between coping and psychopathology in pre-adolescence, with avoidant coping preceding increases in symptoms of anxiety and eating pathology, and depressive symptoms predicting later increases in maladaptive coping.

Negative Affectivity and Emotion Dysregulation as Mediators between ADHD and Disordered Eating: A Systematic Review

Attention-Deficit/Hyperactivity Disorder (ADHD) is associated with disordered eating, especially addictive-like eating behavior (i.e., binge eating, food addiction, loss of control overeating). The exact mechanisms underlying this association are unclear. ADHD and addictive-like eating behavior are both associated with negative affectivity and emotion dysregulation, which we hypothesized are mediators of this relationship. The purpose of this systematic review was to review the evidence related to this hypothesis from studies assessing the relationship between childhood or adulthood ADHD symptomatology, negative affectivity, emotion dysregulation and addictive-like eating behavior. The systematic review followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) recommendations. The literature search was conducted in PubMed and PsycINFO (publication date: January 2015 to August 2020; date of search: 2 September 2020). Out of 403 potentially relevant articles, 41 were retained; 38 publications reported that ADHD and disordered eating or addictive-like eating behavior were significantly associated, including 8 articles that suggested a mediator role of negative affectivity or emotion dysregulation. Sixteen publications reported that the association between ADHD symptomatology and disordered eating or addictive-like eating behavior differed according to gender, eating behavior and ADHD symptoms (hyperactivity, impulsivity and inattention). We discuss the practical implications of these findings and directions future research.

DSM-5 full syndrome, other specified, and unspecified eating disorders in Australian adolescents: prevalence and clinical significance

BACKGROUND

Little information is available on the prevalence of Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 eating disorders in adolescence, and eating disorders remain unique in the DSM for not systematically including a criterion for clinical significance. This study aimed to provide the first prevalence report of the full suite of DSM-5 eating disorders in adolescence, and to examine the impact of applying a criterion for clinical significance.

METHODS

In total, 5191 (participation rate: 70%) Australian adolescents completed a survey measuring 1-month prevalence of eating disorder symptoms for all criterial, 'other specified' and unspecified eating disorders, as well as health-related quality of life and psychological distress.

RESULTS

The point prevalence of any eating disorder was 22.2% (12.8% in boys, 32.9% in girls), and 'other specified' disorders (11.2%) were more common than full criterial disorders (6.2%). Probable bulimia nervosa and binge eating disorder, but not anorexia nervosa (AN), were more likely to be experienced by older adolescents. Most disorders were associated with an increased odds for being at a higher weight. The prevalence of eating disorders was reduced by 40% (to 13.6%) when a criterion for clinical significance was applied.

CONCLUSIONS

Eating disorders, particularly 'other specified' syndromes, are common in adolescence, and are experienced across age, weight, socioeconomic and migrant status. The merit of adding a criterion for clinical significance to the eating disorders, similar to other DSM-5 disorders, warrants consideration. At the least, screening tools should measure distress and impairment associated with eating disorder symptoms in order to capture adolescents in greatest need for intervention.

Prevalence, correlates and comorbidities of feeding and eating disorders in a nationally representative sample of Iranian children and adolescents

OBJECTIVE

This study investigated the prevalence of feeding and eating disorders, and identified their correlates and comorbidities among children and adolescents.

METHOD

We used the nationally representative sample of the Iranian Children and Adolescents' Psychiatric disorders (IRCAP) survey, with 30,532 participants randomly selected by a multistage cluster sampling method. We employed the kiddie schedule for affective disorders and schizophrenia-present and lifetime version (K-SADS-PL) semi-structured face-to-face interview to screen for any psychiatric disorders, including feeding and eating disorders, and associated factors. We used multivariate binary logistic regression to analyze the data.

RESULTS

Valid data from 27,111 participants were analyzed. The total prevalence of feeding and eating disorders among children and adolescents was 0.89 (0.81-1.10). In all types of feeding and eating disorders, the adjusted odds ratio was higher among girls (except binge-eating disorder) and older adolescents but was lower among rural residents. The most common psychiatric comorbidities observed in children and adolescents with feeding and eating disorders were obsessive-compulsive disorder (20.2%), agoraphobia (20.2%), depressive disorder (16.4%), social phobia (10.1%), oppositional defiant disorder (10.1%), generalized anxiety disorder (9.4%), attention deficit hyperactivity disorder (7.5%), and conduct disorder (5.7%), which were significantly more common compared to their peers without feeding and eating disorders.

DISCUSSION

Older age, female gender and living in an urban area are predisposing factors in feeding and eating disorders (in binge-eating disorder, the male gender is a positive correlate). We suggest that future works pay attention to the role of gender, comorbidities and predisposing factors.

Prevalence, features and health impacts of eating disorders amongst First-Australian Yiramarang (adolescents) and in comparison with other Australian adolescents

BACKGROUND

This study aimed to support previous research conducted with First-Australians (FA) by establishing the prevalence of eating disorders, and their demographic distribution and burden in adolescent First-Australians compared to other-Australians (OA).

METHODS

Data were used from the baseline survey of the EveryBODY Study, a longitudinal investigation of eating disorders among Australian adolescents. Of the 5068 participants included, 402 (8%) identified as FA, 4586 (90.5%) identified as OA. Diagnosis of eating disorders was based on the Diagnostic and Statistical Manual version 5. Socioeconomic status and measures of impairment were assessed using validated instruments. Body mass index was calculated based on self-reported weight and height. Statistical analyses used data weighted to the distribution of gender in adolescents in New South Wales in the 2016 Australian Census. Chi-square tests were performed to determine prevalence of eating disorders amongst FA and to compare to OA. ANOVA and logistic regression analyses where conducted to examine the moderation effect of sociodemographic status, measures of impairment and FA status on the distribution of eating disorders.

RESULTS

The prevalence rates for eating disorder diagnoses where similar for FA and OA with the exception of Night eating Syndrome (OSFED-NES), which occurred in 7.14% (95%CI 4.81-10.49) of FA vs. 3.72% (95%CI 3.17-4.36) in OA. The greater prevalence of OSFED-NES in FA was largely explained by poorer psychosocial quality of life amongst FA.

CONCLUSION

Eating disorders are common amongst First-Australian adolescents and are associated with poor psychosocial quality of life. These findings are consistent with previous research conducted with First-Australian adults. There is a need to screen for eating disorders amongst First-Australian adolescent girls and boys.

Feeding and eating disorders

Eating disorders (EDs) are a group of prevalent psychiatric illnesses with an onset in early to late adolescence-a time of significant neural development, physical and psychologic growth, and self-exploration. The etiology and neurobiology of EDs are not well understood, but EDs are recognized as brain-based illnesses with serious acute and long-term consequences if undertreated or ignored. Two EDs, anorexia nervosa (AN) and bulimia nervosa (BN), have historically been the primary EDs of focus. The DSM-5 updated diagnostic criteria for these disorders added two more: binge-eating disorder (BED) and avoidant/restrictive food intake disorder (ARFID). EDs severely impact males as well as females across the weight spectrum. Comorbidity is high; mortality rates for AN and BN are the highest in psychiatric conditions and higher than many medical conditions. Several treatment options are available to treat an ED ranging from inpatient hospitalization to outpatient services and different psychotherapy options. This chapter reviews the diagnostic criteria, clinical presentation, and treatment for these disorders. Where available, sex differences and developmental considerations will be noted. For all EDs, early recognition and swift treatment are necessary to avoid a chronic course.

Prevalence of eating disorders over the 2000-2018 period: a systematic literature review

BACKGROUND

Eating disorders (EDs) lead to multiple psychiatric and somatic complications and thus constitute a major public health concern.

OBJECTIVES

The aim of this study was to give an exhaustive view of the studies reporting the prevalence of the different EDs or total EDs and to study their evolution.

METHODS

A literature search following PRISMA Guidelines and limited to studies in English or French published between 2000 and 2018 was performed and relevant studies were included in this systematic review on the prevalence of EDs. The literature search revealed 94 studies with accurate ED diagnosis and 27 with broad ED diagnosis.

RESULTS

In 94 studies with accurate ED diagnosis, the weighted means (ranges) of lifetime ED were 8.4% (3.3-18.6%) for women and 2.2% (0.8-6.5%) for men. The weighted means (ranges) of 12-month ED prevalence were 2.2% (0.8-13.1%) for women and 0.7% (0.3-0.9%) for men. The weighted means (ranges) of point prevalence were 5.7% (0.9-13.5%) for women and 2.2% (0.2-7.3%) for men. According to continents, the weighted means (ranges) of point prevalence were 4.6% (2.0-13.5%) in America, 2.2% (0.2-13.1%) in Europe, and 3.5% (0.6-7.8%) in Asia.In addition to the former, 27 other studies reported the prevalence of EDs as broad categories resulting in weighted means (ranges) of total point prevalence of any EDs of 19.4% (6.5-36.0%) for women and 13.8% (3.6-27.1%) for men.

CONCLUSIONS

Despite the complexity of integrating all ED prevalence data, the most recent studies confirm that EDs are highly prevalent worldwide, especially in women. Moreover, the weighted means of point ED prevalence increased over the study period from 3.5% for the 2000-2006 period to 7.8% for the 2013-2018 period. This highlights a real challenge for public health and healthcare providers.

Disordered eating behaviors among Christian and Muslim adolescents in Ceuta, a multicultural town

Studies on disordered eating behaviors (DEB) in multicultural populations with multiple religious/cultural affiliations are needed in order to clarify the relationship between cultural background and DEB. Therefore, we compared the presence of DEB among Christian and Muslim adolescents who share their school environment, controlling for the effect of body mass index, demographic variables and lifestyle habits. A sample of 493 girls and boys (339 Christian, 138 Muslim) whose mean (±SD) age was 14.8 (±1.7) years completed self-reporting questionnaires and underwent measurements of anthropometric data. Religious/cultural affiliation was defined by self-identification. The dependent variable, DEB was assessed by means of the Eating Disorders Inventory (EDI-2). Muslim girls and boys score higher than Christians on EDI-2 total scores, especially on the perfectionism subscale. Bivariate and multivariate analyses were used to determine the characteristics associated with DEB, which were detected in 24% of participants (19% of Christians and in 35% of Muslims). Among girls, DEB were directly associated with overweight or obesity, the presence of frequent quarrels with parents, academic failure and spending more than 3 h a day watching screen images. Among boys, DEB were directly associated with overweight or obesity and Muslim background; and inversely associated with age and socioeconomic status.

Attention deficit hyperactivity disorder symptoms and disordered eating in the English general population

OBJECTIVE

Attention deficit hyperactivity disorder (ADHD) symptoms and eating problems often coexist, but many of the previous studies have not taken into account key variables which may be important in this association. Thus, the goal of this study was to assess the association between ADHD symptoms and disordered eating, while taking into account of a variety of factors.

METHOD

This study used cross-sectional, nationally representative data from 7,403 people aged ≥16 years from England who participated in the 2007 Adult Psychiatric Morbidity Survey (APMS). ADHD symptoms were assessed with the Adult ADHD Self-Report Scale (ASRS) Screener. Questions from the five-item SCOFF screening instrument were used to identify possible ED. Multivariable logistic regression analyses were conducted.

RESULTS

The prevalence of possible eating disorder (ED) was much higher among those with ADHD symptoms (ASRS score ≥14) compared to those without ADHD symptoms (19.2 vs. 5.7%). ADHD symptoms were associated with possible ED (odds ratio [OR] = 3.48; 95% confidence interval [CI] = 2.56-4.72) after adjustment for age, sex, and ethnicity. After further adjustment for alcohol dependence, drug use, intelligence quotient, stressful life events, perceived stress, impulsivity, depression, anxiety disorder, and borderline personality disorder (BPD) traits, the OR was attenuated to 1.32 (95% CI = 0.82-2.13). Anxiety and BPD were the factors that led to the largest degree of attenuation.

DISCUSSION

A high prevalence of disordered eating in individuals with ADHD was observed. Factors such as co-existing anxiety and BPD traits may be particularly important in this association. Future research should focus on the factors involved in the association between ADHD symptoms and disordered eating behavior.

An examination of eating disorder education and experience in a 1-month adolescent medicine rotation: what is sufficient to foster adequate self-efficacy?

Objective Medical students and professionals report receiving limited education/training related to treating eating disorders. Because medical professionals are the point of initial contact for these patients and are involved necessarily in their treatment, sufficient knowledge on identification and intervention are imperative. This research set out to examine the impact of the eating disorder education and experience offered through a 1-month Adolescent Medicine rotation at a medical university on medical student/resident self-efficacy. Methods The 1-month rotation includes a standardized patient (SP) simulation, 1.5 h of didactic education, and 1 day observing the MD, nutritionist and psychologist within the outpatient Multidisciplinary Child/Adolescent Eating Disorders Clinic. All residents' (n = 132) eating disorder self-efficacy was assessed before (PRE) completing simulation and didactic session and again at the end of the 1-month rotation (END). Self-efficacy was also assessed after simulation and before the didactic session for group 1 (n = 92) and after simulation and didactic session for group 2 (n = 40). Results For group 1, self-efficacy was not significantly impacted PRE to POST. For group 2, self-efficacy significantly improved PRE to POST. POST to END changes were significant for both groups; however, group 2 scored significantly better across all self-efficacy areas at END. Conclusion Resident training in eating disorders requires more than is offered in many residency programs. SP simulation is strengthened as an effective training tool in assessing and promoting resident self-efficacy if it is followed by didactic education. Clinical observation and extended practice that includes ongoing guidance/feedback on performance is recommended in fostering self-efficacy.

Increasing body image flexibility in a residential eating disorder facility: Correlates with symptom improvement

OBJECTIVE

The purpose of this study was to examine the effects of changes in body image psychological flexibility over the course of treatment on various outcome variables.

METHOD

Participants included 103 female, residential patients diagnosed with an eating disorder. Pretreatment and posttreatment data were collected that examined body image psychological flexibility, general psychological flexibility, symptom severity, and other outcome variables.

RESULTS

Changes in body image psychological flexibility significantly predicted changes in all outcome measures except for obsessive-compulsive symptoms after controlling for body mass index, depression, and anxiety. Additionally, these results were maintained after controlling for general psychological flexibility, contributing to the incremental validity of the BI-AAQ.

DISCUSSION

This study suggests that changes in body image psychological flexibility meaningfully predict changes in various treatment outcomes of interest, including eating disorder risk, quality of life, and general mental health. Findings indicate that body image psychological flexibility might be a viable target for eating disorder treatment.

Long-term outcome of anorexia nervosa: Results from a large clinical longitudinal study

OBJECTIVE

Assessment of the long-term outcome of anorexia nervosa (AN) in a very large sample of inpatients (N = 1,693) and identification of predictors for poor outcome.

METHOD

Over 25 years (mean 10 years), consecutively admitted inpatients of a specialized hospital were followed. A subsample of 112 patients with 20-year follow-up was defined. Bivariate comparisons and logistic regression analysis identified risk factors of poor outcome.

RESULTS

Body mass index (BMI) increased during the follow-up period. Eating behavior as well as general psychopathology improved but did not reach the level of healthy controls. Remission was found in 30% (total sample) and in 40% (20-year follow-up subsample). Crossover from AN to binge-eating disorder or obesity was rare. The predictors of a negative course of illness included lower BMI at admission; a higher score on the Eating Disorder Inventory Maturity Fears subscale at admission; fewer follow-up years; and higher age at admission. The main diagnostic crossover occurred from AN to eating disorder not otherwise specified. Motherhood was related to better outcome.

DISCUSSION

Many patients with very severe AN recover from their illness but AN also shows considerable long-term negative consequences. Over long time periods, survivors show improvement but better treatments for severe cases are still needed. Predictors of outcome included symptom severity, chronicity, and length of follow-up but not psychiatric comorbidity.

The risk of eating disorders comorbid with attention-deficit/hyperactivity disorder: A systematic review and meta-analysis

OBJECTIVE

There has been interest in whether people with Attention-Deficit/Hyperactivity Disorder (ADHD) are at higher risk of developing an Eating Disorder (ED). The aim of this study was estimate the size of this association with a meta-analysis of studies.

METHODS

We retrieved studies following PRISMA guidelines from a broad range of databases.

RESULTS

Twelve studies fitted our primary aim in investigating ED in ADHD populations (ADHD = 4,013/Controls = 29,404), and five exploring ADHD in ED populations (ED = 1,044/Controls = 11,292). The pooled odds ratio of diagnosing any ED in ADHD was increased significantly, 3.82 (95% CI:2.34-6.24). A similar level of risk was found across all ED syndromes [Anorexia Nervosa = 4.28 (95% CI:2.24-8.16); Bulimia Nervosa = 5.71 (95% CI: 3.56-9.16) and Binge Eating Disorder = 4.13 (95% CI:3-5.67)]. The risk was significantly higher if ADHD was diagnosed using a clinical interview [5.89 (95% CI:4.32-8.04)] rather than a self-report instrument [2.23 (95% CI:1.23-4.03)]. The pooled odds ratio of diagnosing ADHD in participants with ED was significantly increased, 2.57 (95% CI:1.30-5.11). Subgroup analysis of cohorts with binge eating only yielded a risk of 5.77 (95% CI:2.35-14.18). None of the variables examined in meta-regression procedures explained the variance in effect size between studies.

DISCUSSION

People with ADHD have a higher risk of comorbidity with an ED and people with an ED also have higher levels of comorbidity with ADHD. Future studies should address if patients with this comorbidity have a different prognosis, course and treatment response when compared to patients with either disorder alone.

RESUMEN OBJETIVO

Ha habido interés en saber si la gente con Trastorno por Déficit de Atención e Hiperactividad (TDAH) están en mayor riesgo de desarrollar un Trastorno de la Conducta Alimentaria (TCA). El objetivo de este estudio fue estimar el tamaño de esta asociación con un meta-análisis de los estudios. Métodos: Recuperamos estudios de una amplia gama base de datos,  que siguen los lineamientos PRISMA. Resultados: Doce estudios encajaron con nuestro objetivo primario de investigar los TCA en poblaciones con TDAH (TDAH = 4,013/Controles = 29,404), y 5 exploraron TDAH en poblaciones con TCA (TCA = 1,044/Controles = 11,292). El odds ratio (OR) agrupado de diagnosticar cualquier TCA en el TDAH se incrementó significativamente, 3.82 (95% CI:2.34-6.24). Un nivel de riesgo similar fue encontrado en todos los síndromes de TCA [Anorexia Nervosa = 4.28 (95% CI:2.24-8.16); Bulimia Nervosa = 5.71 (95% CI:3.56-9.16) y Trastorno por Atracón = 4.13 (95% CI: 3-5.67)]. El riesgo fue significativamente mayor si el TDAH fue diagnosticado utilizando una entrevista clínica [5.89 (95% CI:4.32-8.04)] en lugar de un instrumento de auto-reporte [2.23 (95% CI:1.23-4.03)]. El odds ratio (OR) agrupado de diagnosticar TDAH en participantes con TCA fue significativamente incrementado, 2.57 (95% CI:1.30-5.11). El análisis de los subgrupos de cohort con atracones solamente produjo un riesgo de 5.77 (95% CI:2.35-14.18). Ninguna de las variables examinadas en los procedimientos de meta-regresión explicaron la varianza en el tamaño del efecto entre los estudios. Discusión: La gente con TDAH tiene un mayor riesgo de comorbilidad con un TCA y la gente con un TCA también tiene niveles altos de comorbilidad con TDAH. Los estudios futuros deberán abordar si los pacientes con esta comorbilidad tienen diferente pronóstico, curso y respuesta a tratamiento cuando son comparados con pacientes que solamente tienen uno de los trastornos.  © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016) © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:1045-1057).

Transitioning from DSM-IV to DSM-5: A systematic review of eating disorder prevalence assessment

OBJECTIVE

The objective of this study was to systematically review the literature on assessment of eating disorder prevalence during the DSM-IV era (1994-2015).

METHOD

A PubMed search was conducted targeting articles on prevalence, incidence and epidemiology of eating disorders. The review was performed in accordance with PRISMA guidelines, and was limited to DSM-IV based eating disorder diagnoses published between 1994 and 2015.

RESULTS

A total of 74 studies fulfilled inclusion criteria and were included in the study. Results yielded evidence of over 40 different assessment instruments used to assess eating disorder prevalence, with the EAT-40 being the most commonly used screening instrument, and the SCID being the most frequently used interview. The vast majority of studies employed two-stage designs, closely followed by clinical interviews. Observations of higher prevalence rates were found in studies employing self-reports compared to two-stage designs and interviews.

DISCUSSION

Eating disorder prevalence rates have varied significantly during the DSM-IV era, and are dependent on assessment methods used and samples investigated. Following the transition to the DSM-5, eating disorder prevalence will change, warranting novel approaches to assessment and treatment planning. © 2016 Wiley Periodicals, Inc.

Epidemiology of eating disorders in Europe: prevalence, incidence, comorbidity, course, consequences, and risk factors

PURPOSE OF REVIEW

Eating disorders - anorexia nervosa, bulimia nervosa, and binge eating disorder - affect numerous Europeans. This narrative review summarizes European studies on their prevalence, incidence, comorbidity, course, consequences, and risk factors published in 2015 and the first half of 2016.

RECENT FINDINGS

Anorexia nervosa is reported by <1-4%, bulimia nervosa <1-2%, binge eating disorder <1-4%, and subthreshold eating disorders by 2-3% of women in Europe. Of men, 0.3-0.7% report eating disorders. Incidences of anorexia appear stable, whereas bulimia may be declining. Although the numbers of individuals receiving treatment have increased, only about one-third is detected by healthcare. Over 70% of individuals with eating disorders report comorbid disorders: anxiety disorders (>50%), mood disorders (>40%), self-harm (>20%), and substance use (>10%) are common. The long-term course of anorexia nervosa is favorable for most, but a substantial minority of eating disorder patients experience longstanding symptoms and somatic problems. The risk of suicide is elevated. Parental psychiatric disorders, prenatal maternal stress, various family factors, childhood overweight, and body dissatisfaction in adolescence increase the risk of eating disorders.

SUMMARY

Eating disorders are relatively common disorders that are often overlooked, although they are associated with high comorbidity and serious health consequences.

Serotonin transporter gene polymorphism in eating disorders: Data from a new biobank and META-analysis of previous studies

Objectives Growing interest focuses on the association between 5-HTTLPR polymorphism and eating disorders (ED), but published findings have been conflicting. Methods The Italian BIO.VE.D.A. biobank provided 976 samples (735 ED patients and 241 controls) for genotyping. We conducted a literature search of studies published up to 1 April 2015, including studies reporting on 5HTTLPR genotype and allele frequencies in obesity and/or ED. We ran a meta-analysis, including data from BIO.VE.D.A. - comparing low and high-functioning genotype and allele frequencies in ED vs.

CONTROLS

Results Data from 21 studies, plus BIO.VE.D.A., were extracted providing information from 3,736 patients and 2,707 controls. Neither low- nor high-functioning genotype frequencies in ED patients, with both bi- and tri-allelic models, differed from controls. Furthermore, neither low- nor high-functioning allele frequencies in ED or in BN, in both bi- and triallelic models, differed from control groups. After sensitivity analysis, results were the same in AN vs.

CONTROLS

Results remained unaltered when investigating recessive and dominant models. Conclusions 5HTTLPR does not seem to be associated with ED in general, or with AN or BN in particular. Future studies in ED should explore the role of ethnicity and psychiatric comorbidity as a possible source of bias.

Thinking dimensional: prevalence of DSM-5 early adolescent full syndrome, partial and subthreshold eating disorders in a cross-sectional survey in German schools

OBJECTIVES

Investigating for the first time in Germany Diagnostic and Statistical Manual Fifth Edition (DSM-5) prevalences of adolescent full syndrome, Other Specified Feeding or Eating Disorder (OSFED), partial and subthreshold anorexia nervosa (AN), bulimia nervosa (BN) and binge eating disorder (BED).

METHOD

A national school-based cross-sectional survey with nine schools in Germany was undertaken that was aimed at students from grades 7 and 8. Of the 1775 students who were contacted to participate in the study, 1654 participated (participation rate: 93.2%). The sample consisted of 873 female and 781 male adolescents (mean age=13.4 years). Prevalence rates were established using direct symptom criteria with a structured inventory (SIAB-S) and an additional self-report questionnaire (Eating Disorder Inventory 2 (EDI-2)).

RESULTS

Prevalences for full syndrome were 0.3% for AN, 0.4% for BN, 0.5% for BED and 3.6% for OSFED-atypical AN, 0% for BN (low frequency/limited duration), 0% for BED (low frequency/limited duration) and 1.9% for purging disorder (PD). Prevalences of partial syndrome were 10.9% for AN (7.1% established with cognitive symptoms only, excluding weight criteria), 0.2% for BN and 2.1% for BED, and of subthreshold syndrome were 0.8% for AN, 0.3% for BN and 0.2% for BED. Cases on EDI-2 scales were much more pronounced with 12.6-21.1% of the participants with significant sex differences.

CONCLUSIONS

The findings were in accordance with corresponding international studies but were in contrast to other German studies showing much higher prevalence rates. The study provides, for the first time, estimates for DSM-5 prevalences of eating disorders in adolescents for Germany, and evidence in favour of using valid measures for improving prevalence estimates.

TRIAL REGISTRATION NUMBER

DRKS00005050; Results.