Binge-eating disorder (BED) is characterized by recurrent objective binge eating that occurs in the absence of compensatory behaviors to prevent weight gain. As the most common eating disorder emerging in youth, BED co-occurs with increased eating disorder and general psychopathology, impaired quality of life, and obesity [1]. Despite its clinical significance, there is a dearth of treatment studies in adolescents [1, 2]. Regarding cognitive-behavioral therapy (CBT), the most well-established treatment for adults with BED [2], one pilot randomized-controlled trial (RCT) in 25 adolescent girls with objective binge eating suggested superiority to wait-list (WL) in achieving binge-eating abstinence through 6 months following randomization and in improving eating disorder psychopathology, but not in reducing binge eating or standardized body mass index (BMI; kg/m2) [3]. Other CBT-related RCTs documented efficacy of Internet-based, weight loss-oriented self-help versus WL [4] and no differences in dialectical behavior therapy versus weight management [5]. Based on this preliminary evidence, the aim of the BEDA (Binge Eating Disorder in Adolescents) study was to provide a confirmatory test of the efficacy of CBT in adolescent BED. It was hypothesized that CBT will be superior to WL in improving binge eating, associated psychopathology, and quality of life, but not BMI, with long-term maintenance of effects.

Objective: Loss of control (LOC) eating is a salient indicator of eating disorder psychopathology in adolescents and is associated with marked distress. While research has focused on the relevance of episode size, clinical significance of LOC eating frequency has rarely been explored. Therefore, this study aimed at identifying LOC eating prevalence with respect to its recurrence and associated variables in a community-based sample. Method: Participants were 1643 adolescents, aged 12-20 years (62.4% female). Based on EDE-Q self-report, participants were categorized as those reporting recurrent (N = 156; 9.5%), non-recurrent (N = 226; 13.8%) and no LOC eating (N = 1261; 76.7%). Results: Adolescents with recurrent LOC eating reported clinically relevant and significantly greater eating disorder psychopathology, functional impairment and distress because of LOC eating, and a significantly higher body mass index (BMI, kg/m2) than adolescents with non-recurrent and those without LOC eating. Discussion: These results underline that LOC eating is a common eating behavior among adolescents in the community associated with clinical characteristics of eating disorders, and could therefore be a risk factor for developing full- or partial-syndrome eating disorders. Further research on the classification of eating disorders in adolescents with LOC eating and severity indicators is warranted.

A sizeable body of research has documented Expressed Emotion (EE) to predict clinical outcomes in various psychiatric disorders, including eating disorders. Patients’ perceptions of relative’s EE, however, were found to play an important role in the processing of EE. This study aimed to examine the level of perceived EE in adolescent binge-eating disorder (BED) and its impact on eating disorder psychopathology. Adolescents (12 – 20 years) seeking treatment for BED (n = 40) were compared to adolescents without current or lifetime eating disorder (CG; n = 40). Both groups were stratified according to age, sex, body mass index (BMI, kg/m2), and socio-economic status. The Five Minute Speech Sample (FMSS) and the Brief Dyadic Scale of EE were administered to assess patients’ perceived maternal EE. Additionally, adolescents and mothers completed questionnaires on eating disorder and general psychopathology. On the FMSS, 37.5% of patients with BED perceived their mothers as high EE (vs. 12.5% in the CG). On the Brief Dyadic Scale of EE, patients with BED reported significantly higher levels of perceived maternal criticism, emotional overinvolvement, and lower levels of perceived warmth than controls. After controlling for the diagnosis of BED, perceived criticism and warmth, as assessed by questionnaire, significantly explained adolescents’ global eating disorder psychopathology. Negative perceptions of maternal behavior and emotional atmosphere towards the child are characteristic of adolescent BED. As documented for other eating disorders, family factors are likely to have substantial implications for the maintenance and treatment of adolescent BED.

Background: Binge-eating disorder (BED) as a distinct eating disorder category and night eating syndrome (NES) as a form of Other Specified Feeding or Eating Disorders were recently included in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). Objectives: This study sought to investigate the prevalence of BED and NES and associations with various forms of non-normative eating behavior and psychopathology in prebariatric patients. Setting: Within a consecutive multicenter registry study, patients in six bariatric surgery centers in Germany were recruited. Methods: Overall, 233 prebariatric patients were assessed using the Eating Disorder Examination and self-report questionnaires. Assessment was unrelated to clinical procedures. Results: Diagnostic criteria for full-syndrome BED and NES were currently met by 4.3% and 8.2% of prebariatric patients, respectively. In addition, 8.6% and 6.9% of patients met subsyndromal BED and NES criteria, respectively. Comorbid BED and NES diagnoses were present in 3.9% of patients. In comparison to patients without any eating disorder symptoms, patients with BED and NES reported greater emotional eating, eating in the absence of hunger, and more symptoms of food addiction. Moreover, differences between patients with BED and NES emerged with more objective binge eating episodes and higher levels of eating concern, weight concern, and global eating disorder psychopathology in patients with BED. Conclusions: BED and NES were shown to be prevalent among prebariatric patients, with some degree of overlap between diagnoses. Associations with non-normative eating behavior and psychopathology point to their clinical significance and discriminant validity.

Objective: Emerging prospective evidence from mixed samples, mostly covering short-term follow-up periods, suggests that childhood loss of control (LOC) eating predicts significant impairment in mental and physical health. This study sought to investigate the natural course of childhood LOC eating over the long term and in relation to binge eating disorder (BED) diagnosis, psychopathology, and body weight trajectory in the community. Method: A total of 60 children (8-13 years) with LOC eating within the past three months and 60 demographically-matched children without LOC history were assessed with the Eating Disorder Examination adapted for Children and self-report questionnaires over a 5.5 year follow-up period. Missing data were imputed. Results: Over follow-up, 38.3% of children showed persistent LOC eating, and 28.3% revealed an onset of LOC eating. Persistent LOC eating significantly predicted onset of partial-/full-syndrome BED at follow-up. Negative prognostic effects on eating disorder psychopathology, depressive symptoms, and body mass index were non-significant. Discussion: The results indicate a moderate stability of LOC eating over the long term. LOC eating, especially if stable, was suggested as a variable risk factor of clinically relevant eating disturbances. In contrast, a prognostic value for psychopathology and body mass index was not confirmed.

Die vorliegende Literatursichtung belegt, gerade im Lichte neuen Störungswissens und für neue diagnostische Kategorien, die Notwendigkeit, die Wirksamkeit bestehender Therapieformen zu erhöhen und/oder neue Behandlungen für Essstörungen, speziell für Bulimia Nervosa und Binge Eating-Störung, zu entwickeln. Ein wesentlicher Erkenntnisgewinn wird zudem von einer systematischen Analyse des therapeutischen Prozesses sowie von Moderatoren und Mediatoren erwartet. Darüber hinaus stellen die Dissemination evidenzbasierter Therapiemethoden in die Praxis und eine Überprüfung gestufter Behandlungsmodelle wichtige Aufgaben zukünftiger Forschung dar. / The consideration of existing literature, especially in light of new knowledge of eating disorders and new diagnostic categories, highlights the necessity to increase the efficacy of current forms of therapy, and to develop novel therapies for eating disorders. This pertains, in particular, to bulimia nervosa and binge eating disorder. A considerable gain in knowledge is to be expected from a systematic analysis of the therapeutic process as well as the moderators and mediators. Furthermore, dissemination of evidence-based treatment methods in practical settings and an examination of stepped care models are important avenues of future research.

Essstörungen sind prävalente psychische Störungen mit schwerwiegenden, oftmals langfristigen Auswirkungen auf die psychische und körperliche Gesundheit. Eine zunehmende Anzahl von klinischen Studien dokumentiert die Wirksamkeit verschiedener psychotherapeutischer Ansätze für spezifische Essstörungen. Im vorliegenden Themenheft 5 werden die Wirksamkeit von neuen Ansätzen zur Einzeltherapie und zur internet-basierten Rückfallprophylaxe, die Patientensicht auf die Therapie sowie die Relevanz von Faktoren des therapeutischen Prozesses bei verschiedenen Essstörungen beleuchtet. Weiterer Forschungsbedarf besteht insbesondere hinsichtlich des Prozesses und der Dissemination evidenzbasierter Psychotherapie für Essstörungen. / Eating disorders are prevalent psychiatric disorders with severe and longstanding 15 implications for mental and physical health. An increasing number of clinical studies documents the efficacy of certain psychotherapeutic approaches for specific eating disorders. This special issue addresses the efficacy of novel approaches in face-to-face individual therapy and Internet-based relapse prevention, patient views of treatment, and the relevance of therapeutic process factors for diverse eating disorders. Further research is particularly 20 warranted regarding the process and dissemination of evidence-based psychotherapy for eating disorders.

Hintergrund. Für die durch wiederkehrende Essanfälle gekennzeichnete Binge Eating-Störung (BES) wurde die Kognitive Verhaltenstherapie (KVT) als Behandlungsmethode der Wahl etabliert. Zum Psychotherapieprozess, welcher das Therapieergebnis beeinflusst, ist jedoch wenig bekannt. Fragestellung. Da Untersuchungen zum Prozessaspekt der therapeutischen Adhärenz Unterschiede zwischen Patienten eines Therapeuten sowie zwischen verschiedenen Therapeuten belegen, soll der Einfluss von Patienten- und Therapeutenmerkmalen auf die therapeutische Adhärenz geprüft werden. Methode. In einer prospektiven, multizentrischen, randomisiert-kontrollierten Behandlungsstudie zum Wirksamkeitsvergleich von KVT und Internet-basierter angeleiteter Selbsthilfe (INTERBED) wurde die therapeutische Adhärenz in der KVT durch unabhängige Rater erfasst. Patienten- und Therapeutenmerkmale wurden mittels Interview und Selbstbericht erhoben. Ergebnisse. Soziodemografische Merkmale wie ein geringeres Bildungsniveau der Patienten und weibliches Geschlecht der Therapeuten wurden als signifikante Prädiktoren einer höheren therapeutischen Adhärenz identifiziert. Störungsspezifische Merkmale der Patienten waren nicht mit der therapeutischen Adhärenz assoziiert. Therapeutenmerkmale wie ein geringerer Ausbildungsgrad, eine geringere erlebte therapeutische Kompetenz und höhere Erwartungen sowie ein höheres emotionales Wohlbefinden der Therapeuten sagten eine höhere therapeutische Adhärenz vorher. Diskussion. Die etablierte hohe therapeutische Adhärenz erschien unabhängig vom Patienten, während einige Therapeutenmerkmale als Prädiktoren identifiziert wurden. Ungünstige Einflüsse auf die therapeutische Adhärenz bedürfen weiterer Erforschung und einer stärkeren Berücksichtigung in der Ausbildung von Therapeuten. / Background. Cognitive-behavioral therapy (CBT) has been established as the treatment of choice for binge-eating disorder (BED) which is characterized by recurrent binge eating episodes. However, only little is known about the impact of the psychotherapeutic process on treatment outcomes. Objectives. While studies concerning the process aspect of therapist adherence found differences between patients from one therapist as well as differences between therapists, the impact of patient and therapist characteristics on therapist adherence will be investigated. Methods. In a prospective multicenter randomized-controlled trial comparing CBT to Internet-based guided self-help (INTERBED), the therapist adherence to CBT was determined by independent raters. Patient and therapist characteristics were obtained via interview and self-report questionnaires. Results. Sociodemographic characteristics including lower education in patients and female sex in therapists were identified as predictors of higher therapist adherence. Disorder-specific characteristics of patients were not associated with the therapist adherence. Therapist characteristics including less postgraduate therapist training, lower self-rated therapeutic competence, and higher expectations as well as higher emotional well-being of therapists predicted higher therapist adherence. Conclusions. The high level of therapist adherence was mostly independent from patients, while some therapist characteristics were identified as predictors. Adverse impacts on therapist adherence should be investigated further and might be considered in therapeutic training.

Während Leitlinien „Gold-Standards“ für die Psychotherapie bei bulimischen Essstörungen (Bulimia Nervosa und Binge-Eating-Störung) empfehlen, ist über psychotherapeutische Prozessfaktoren bei Essstörungen wenig bekannt. Ziel war es, mit Hilfe des etablierten Generic Model of Psychotherapy zur Systematisierung psychotherapeutischer Prozessfaktoren die aktuelle Literatur zum Einfluss dieser Faktoren auf den Therapieerfolg, operationalisiert als Symptomreduktion oder -remission, auf Basis einer systematischen Datenbanksuche zu sichten. Während der Einfluss des therapeutischen Settings nach bisheriger Forschungslage kaum Schlüsse hinsichtlich des Therapieerfolgs zulässt, konnte dieser durch spezifische Interventionen, frühe Symptomreduktionen und eine gute therapeutische Beziehung vorhergesagt werden. Weitere Forschung zu Prozessfaktoren bei bulimischen Essstörungen erscheint notwendig, um die praktische psychotherapeutische Arbeit zu unterstützen und Behandlungen effektiver gestalten zu können. / While guidelines recommend gold standards for psychotherapy in bulimic eating disorders (bulimia nervosa and binge eating disorder), less is known about psychotherapeutic process aspects. We aimed to summarize the current literature on the impact of process aspects on significant symptom reductions and/or abstinence as treatment outcome using the Generic Model of Psychotherapy. A systematic literature search was conducted. While effects of treatment settings can not yet be estimated, specific interventions, rapid response, and the therapeutic bond repeatedly predicted outcome. Process-outcome research in bulimic eating disorders will be necessary to support clinical practice and to enhance treatment efficacy.

Objective: For eating disorders, a vast number of investigations have demonstrated the efficacy of psychological treatments. However, evidence supporting the impact of therapeutic process aspects on outcome (i.e., process-outcome research) has not been disentangled. Method: Using the Generic Model of Psychotherapy (GMP) to organize various process aspects, a systematic literature search was conducted on psychological treatment studies for anorexia nervosa, bulimia nervosa, binge-eating disorder, and eating disorders not otherwise specified. Results: Improved outcomes resulted for family-based treatment compared to individual treatment, for individual compared to group treatment, booster sessions, and positive patient expectations (GMP contract aspect); for nutritional counseling and exercising but not exposure with response prevention as adjunct interventions (therapeutic operations); for highly motivated patients and, to a lesser extent, for therapeutic alliance (therapeutic bond); as well as for rapid response and longer overall treatment duration (temporal patterns). Regarding other GMP aspects, studies on self-relatedness were completely lacking and in-session impacts were rarely investigated. Discussion: As most studies assessed only a limited number of process aspects, the ability to draw conclusions about their overall impact regarding outcome is rather limited. Therefore, future process-outcome research is needed beyond investigations of treatment efficacy for eating disorders.