A randomized controlled comparison of integrative cognitive-affective therapy (ICAT) and enhanced cognitive-behavioral therapy (CBT-E) for bulimia nervosa

Bulimia Nervosa and Binge-Eating Disorder Across the Lifespan

This article aims to review the current evidence-based psychotherapy and psychopharmacological treatments for adults and youths with bulimia nervosa (BN) and binge-eating disorder (BED). Treatments for adults and for children and adolescents are discussed separately, including developmental considerations in the management of these disorders among youths. Although several evidence-based psychotherapy and psychopharmacological treatment options have been established for adults with BN or BED, there is much less empirical support for the management of these eating disorders among children and adolescents. This review concludes by discussing promising modalities and innovations, highlighting the potential utility of integrating technology into treatment approaches. Despite decades of treatment development and testing, a sizable proportion of individuals with BN or BED do not respond to the current evidence-based treatments, highlighting the need for continued research in these domains. Future research should focus on testing psychotherapy treatments among diverse samples in large, randomized controlled trials, as well as on treatments that can be easily scaled and implemented in community settings.

Outcomes and associated clinical features of people with eating disorders participating in residential treatment facilities: a scoping review

Residential treatment programs for eating disorders (EDs) have gained popularity in recent years, expanding beyond the United States to countries such as Canada, Italy, and the United Kingdom. These programs offer a "home-like" environment where individuals reside for several weeks or months, emphasising both physical restoration and psychological recovery. This scoping review aimed to provide an update since the most recent reviews on the literature regarding outcomes of residential treatment programs for EDs and to explore clinical features that were associated with these outcomes. Methods used followed the Joanna Briggs Institute guidelines for scoping reviews. A systematic search of electronic databases was conducted, and 12 studies met the inclusion criteria. All studies reported improvements in various outcomes from admission to discharge, including changes in eating psychopathology, weight restoration, depression, anxiety, and quality of life. Additionally, three studies reported positive outcomes at intervals after discharge and three predictive factors (self-compassion, personality organisation, and resistance to emotional vulnerability) were reported in a small number of studies. While residential treatment facilities consistently showed positive outcomes, the review highlights the need for randomised controlled studies to establish the efficacy of these programs for EDs. Future research should include controlled studies comparing residential facilities to other treatment settings and incorporate long-term follow-up outcomes and further studies of emergent predictive factors identified in this review.

There is nothing as inconsistent as the OSFED diagnostic criteria

Atypical anorexia nervosa (AAN), purging disorder (PD), night eating syndrome (NES), and subthreshold bulimia nervosa and binge-eating disorder (Sub-BN/BED) are the five categories that comprise the 'Other Specified Feeding or Eating Disorder' (OSFED) category in the Diagnostic and Statistical Manual for Mental Disorders (DSM-5). In this review, we examine problems with the diagnostic criteria that are currently proposed for the five OSFED types. We conclude that the existing diagnostic criteria for OSFED are deficient and fall short of accurately describing the complexity and individuality of those with these eating disorders (EDs). Therefore, to enhance the quality of life of people with OSFED, diagnostic criteria for the condition should be applied uniformly in clinical and research settings.

Cognitive behavioral therapy versus compassion focused therapy for adult patients with eating disorders with and without childhood trauma: A randomized controlled trial in an intensive treatment setting

OBJECTIVE

Treatments for eating disorders are moderately effective, with cognitive behavior therapy (CBT) providing the strongest evidence. However, it remains important to investigate other interventions, particularly for eating disorders with greater complexity (e.g., substantial comorbidity; trauma history) or for patients who have not responded adequately to previous treatments.

METHOD

This randomized controlled trial compared CBT against compassion-focused therapy for eating disorders (CFT-E), where half of the sample had a childhood trauma history. The study was pre-registered and adequately powered. A total of 130 patients were randomly assigned to CBT or CFT-E and were assessed at pre-treatment, post-treatment and one-year follow-up. The primary outcome measure was the total score on the Eating Disorder Examination-Interview (EDE), and secondary outcome measures were the Symptom Checklist-90, Inventory of Interpersonal Problems-64 and Post-Traumatic Symptom Scale. Attrition during treatment was low (13%), suggesting good acceptability.

RESULTS

Eating pathology (EDE scores) reduced substantially overall, with large effect sizes, and there were no differences between therapies. However, at follow-up, for patients with a childhood trauma history, CFT-E maintained benefits better than CBT.

CONCLUSION

While both CBT and CFT-E resulted in significant reductions in eating pathology, CFT-E showed superior maintenance of benefits for patients with a history of childhood trauma at one-year follow-up, underlining the necessity of tailored interventions for specific patient subgroups.

Latent profiles of emotion dysregulation among individuals with binge-spectrum eating disorders: Associations with eating disorder pathology

OBJECTIVE

Emotion dysregulation (i.e., a multi-component term comprising nonacceptance of emotional responses, difficulty engaging in goal-directed behaviour, impulse control difficulties, lack of emotional awareness, limited access to emotion regulation strategies, and lack of emotional clarity) is a well-established transdiagnostic risk and maintenance factor for eating disorders. To date, there is limited information on how varying scores on subdomains of emotion dysregulation may yield distinct profiles in individuals with binge-spectrum eating disorders (B-EDs), and how these emotion dysregulation profiles may inform resultant symptomatology.

METHOD

In the current study, treatment-seeking individuals with B-EDs (n = 315) completed the Difficulties in Emotion Regulation Scale (DERS) and Eating Disorder Examination. Latent profile analysis was conducted on the six subscales of the DERS. Identified latent profiles were examined as predictors of eating disorder pathology using linear regression, and a two-class model of emotion dysregulation fit the data.

RESULTS

Class 1 (n = 113) was low in all of the DERS subscales, while Class 2 (n = 202) was high in all of the DERS subscales. Individuals in Class 2 had a significantly higher frequency of compensatory behaviours in the past month (F(1,313) = 12.97, p < 0.001), and significantly higher restraint scores (F(1,313) = 17.86, p < 0.001). The classes also significantly differed in terms of eating concern (F(1,313) = 20.89, p < 0.001) and shape concern (F(1,313) = 4.59, p = 0.03), with both being higher for Class 2.

DISCUSSION

We found only two distinct classes of emotion dysregulation in B-ED's such that individuals were simply high or low in emotion dysregulation. These results suggest that it may be more valuable for future research to evaluate emotion dysregulation as a cohesive whole rather than conceptualising the construct as having truly distinct subdomains.

Psychotherapies for eating disorders: findings from a rapid review

BACKGROUND

Psychotherapy is considered central to the effective treatment of eating disorders-focusing on behavioural, psychological, and social factors that contribute to the illness. Research indicates psychotherapeutic interventions out-perform placebo, waitlist, and/or other treatments; but, outcomes vary with room for major improvement. Thus, this review aims to (1) establish and consolidate knowledge on efficacious eating disorder psychotherapies; (2) highlight select emerging psychotherapeutic interventions; and (3) identify knowledge gaps to better inform future treatment research and development.

METHODS

The current review forms part of a series of Rapid Reviews published in a special issue in the Journal of Eating Disorders to inform the development of the Australian-government-funded National Eating Disorder Research and Translation Strategy 2021-2031. Three databases were searched for studies published between 2009 and 2023, published in English, and comprising high-level evidence studies (meta-analyses, systematic reviews, moderately sized randomised controlled studies, moderately sized controlled-cohort studies, and population studies). Data pertaining to psychotherapies for eating disorders were synthesised and outlined in the current paper.

RESULTS

281 studies met inclusion criteria. Behavioural therapies were most commonly studied, with cognitive-behavioural and family-based therapies being the most researched; and thus, having the largest evidence-base for treating anorexia nervosa, bulimia nervosa, and binge eating disorder. Other therapies, such as interpersonal and dialectical behaviour therapies also demonstrated positive treatment outcomes. Emerging evidence supports specific use of Acceptance and Commitment; Integrative Cognitive Affective; Exposure; Mindfulness; and Emotionally-Focused therapies; however further research is needed to determine their efficacy. Similarly, growing support for self-help, group, and computer/internet-based therapeutic modalities was noted. Psychotherapies for avoidant/restrictive food intake disorder; other, and unspecified feeding and eating disorders were lacking evidence.

CONCLUSIONS

Currently, clinical practice is largely supported by research indicating that behavioural and cognitive-behavioural psychotherapies are most effective for the treatment of eating disorders. However, the efficacy of psychotherapeutic interventions varies across studies, highlighting the need for investment and expansion of research into enhanced variants and novel psychotherapies to improve illness outcomes. There is also a pressing need for investigation into the whole range of eating disorder presentations and populations, to determine the most effective interventions.

Metacognitive interpersonal therapy-eating disorders versus cognitive behavioral therapy for eating disorders for non-underweight adults with eating disorders: study protocol for a pilot pre-registered randomized controlled trial

Eating disorders (ED) are serious disorders characterized by an alteration of eating habits and excessive concern about weight and body shapes (Fairburn, 2002), accompanied by significant impairment inequality of life, high mortality rates and serious organic consequences (Jenkins et al., 2011; Treasure et al., 2015; 2020). Although evidence-based psychological therapies for nonunderweight ED presentations such as cognitive behavioral therapy for eating disorders (CBT-ED) are widely available, there is substantial scope for improvements, particularly in terms of efficacy and adherence. One option is to develop interventions to address elements of pathology not fully addressed by existing empirical supported treatments, such as incorporating techniques aimed at addressing interpersonal problems and personality disorder features into existing treatment delivery. We adapted Metacognitive Interpersonal Therapy, a psychological intervention supported by evidence for treating personality disorders and integrated it with existing CBT techniques for eating disorders (MIT-ED). MIT-ED targets aspects of ED that are not included in the transdiagnostic CBT-E model such as poor metacognition, or maladaptive interpersonal schemas. This is a pre-registered (Protocol number: 0000781) pilot randomized clinical trial aimed at assessing acceptability and feasibility of MIT-ED and establishing preliminary evidence of effectiveness for future larger studies. Twenty patients (10 in each arm) will be randomized to 20 sessions of individual psychotherapy, either MIT-ED or CBTE. Repeated follow-ups will be collected up to 24 months. Participants are recruited at a private outpatient clinic for ED treatment. Acceptability will be assessed via session attendance, completion rates and preliminary outcomes. The primary outcome is ED pathology assessed with the Eating Disorder Examination Questionnaire-6. Other ED outcomes assessed will be eating disorder attitudes, clinical impairment and binge eating pathology. Secondary treatment outcomes are anxiety, depression, and global symptomatology. We will also assess emotional awareness, emotion regulation and therapeutic alliance. Based on previous studies of MIT for personality disorders we hypothesize that MIT-ED will be acceptable to patients, evidenced by high treatment adherence and retention. We hypothesize that MIT-ED will be associated with reductions in eating disorder pathology, at least equivalent to CBT-E. Results will be used to inform the study design, sampling, likely effect sizes and choice of outcome measures for future larger trials of MIT-ED in ED samples.

Examining the role of craving in affect regulation models of binge eating: Evidence from an ecological momentary assessment study

Affect regulation models hypothesize that aversive affective states drive binge-eating behavior, which serves to regulate unpleasant emotions. Research using ecological momentary assessment (EMA) demonstrates that increases in guilt most strongly predict subsequent binge-eating episodes, raising the question: why would individuals with binge-eating pathology engage in a binge-eating episode when they feel guilty? Food craving is a robust predictor of binge eating and is commonly associated with subsequent feelings of guilt. The current study used EMA to test the hypothesis that food craving may promote increased feelings of guilt, which then predict an increased risk of binge eating within a sample of 109 individuals with binge-eating disorder. Multilevel mediation models indicated that increased momentary craving at Time 1 directly predicted a greater likelihood of binge eating at Time 2, and craving also indirectly predicted binge eating at Time 2 through momentary increases in guilt at Time 2. In other words, experiencing food craving at one time point was related to an increased likelihood of binge eating at the next time point, and a portion of this influence was attributable to increasing feelings of guilt. These results challenge simple affect regulation models of binge eating, suggesting that food-related anticipatory reward processes (i.e., craving) may be the primary driver of binge-eating risk and account for the increases in guilt commonly observed prior to binge-eating episodes. Although experimental studies are needed to confirm this possibility, these results suggest the importance of addressing food cravings within interventions for binge-eating disorder. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Project Body Neutrality: Piloting a digital single-session intervention for adolescent body image and depression

OBJECTIVE

Eating disorders and depression impact youth at alarming rates, yet most adolescents do not access support. Single-session interventions (SSIs) can reach youth in need. This pilot examines the acceptability and utility of a SSI designed to help adolescents improve functionality appreciation (a component of body neutrality) by focusing on valuing one's body based on the functions it performs, regardless of appearance satisfaction.

METHOD

Pre- to post-intervention data were collected, and within-group effect sizes and 95% confidence intervals were computed, to evaluate the immediate effects of the SSI on hopelessness, functionality appreciation, and body dissatisfaction. Patterns of use, demographics, program feedback, and responses from within the SSI were collected.

RESULTS

The SSI and all questionnaires were completed by 75 adolescents (ages: 13-17 years, 74.70% White/Caucasian, 48.00% woman/girl) who reported elevated body image and mood problems. Analyses detected significant pre-post improvements in hopelessness (dav  = 0.60, 95% CI: 0.35-0.84; dz  = 0.77, 95% CI: 0.51-1.02), functionality appreciation (dav  = 0.72, 95% CI: 0.46-0.97; dz  = 0.94, 95% CI: 0.67-1.21), and body dissatisfaction (dav  = 0.61, 95% CI: 0.36-0.86; dz  = 0.76, 95% CI: 0.50-1.02). The SSI was rated as highly acceptable, with a mean overall score of 4.34/5 (SD = 0.54). Qualitative feedback suggested adolescents' endorsement of body neutrality concepts, including functionality appreciation, as personally-relevant, helpful targets for intervention.

DISCUSSION

This evaluation supports the acceptability and preliminary effectiveness of the Project Body Neutrality SSI for adolescents with body image and mood concerns.

PUBLIC SIGNIFICANCE

Results suggest the acceptability and utility of a digital, self-guided, single-session intervention-Project Body Neutrality-for adolescents experiencing co-occurring depressive symptoms and body image disturbances. Given the intervention's low cost and inherent scalability, it may be positioned to provide support to youth with limited access to traditional care.

Examining the role of urgency in predicting binge size in bulimia nervosa

Greater binge size within bulimia nervosa is associated with elevated distress and impairment. Theoretical models posit that emotion dysregulation predicts binge eating, but little research has investigated the potential for dispositional traits that reflect difficulty in emotion regulation to predict binge size among women with bulimia nervosa. Research supports that negative urgency, the tendency to act rashly when feeling distressed, is associated with binge eating behavior among individuals with bulimia nervosa. Relatively fewer studies have explored associations between binge eating and positive urgency, the tendency to act rashly when feeling extreme positive affect. The urgency traits may predict greater binge size within bulimia nervosa. The current study sought to examine negative urgency and positive urgency as predictors of test meal intake in a sample of 50 women, n = 21 with bulimia nervosa and n = 29 healthy controls. Dispositional levels of positive urgency, negative urgency, positive affect, and negative affect were measured prior to a laboratory binge eating paradigm. Participants in the bulimia nervosa group scored higher on negative urgency, positive urgency, and negative affect than participants in the control group. Across participants, lower levels of negative affect were associated with greater test meal intake. Elevated levels of positive urgency predicted significantly greater test meal intake, but only for participants with bulimia nervosa. No other dispositional traits predicted test meal intake when the interaction of positive urgency and group was included in the model. Findings suggest positive urgency is an underappreciated, but potentially important, risk factor for greater binge size in bulimia nervosa.

Realizing the untapped promise of single-session interventions for eating disorders

OBJECTIVE

Multilevel treatment barriers prevent up to 80% of individuals experiencing eating disorders (EDs) from accessing care. This treatment gap creates a critical need to identify interventions that are accessible, easily completable, and optimized for effectiveness by targeting core mechanisms linked to ED onset and maintenance. We propose single-session interventions (SSIs) as a promising path toward catalyzing innovation in the development of accessible, effective ED interventions. SSIs are structured programs that intentionally involve one encounter with a program or provider; they may serve as stand-alone or adjunctive clinical supports. All SSIs are built to acknowledge that any session might be someone's last-and that any single session can nonetheless yield meaningful clinical benefit.

METHOD

We define SSIs, summarize research supporting their utility for ED symptoms and other mental health problems, and recommend future directions for work in this domain.

RESULTS

Single-session interventions may hold promise to reduce some ED symptoms and risk factors, including restrictive eating and negative body image. Steps toward realizing this promise include (1) testing whether existing evidence-based SSIs (e.g., for depression) can also reduce EDs, risk factors, and symptoms; (2) developing novel SSIs that target modifiable ED risk factors and symptoms largely unaddressed by SSIs, such as purging and binge eating; (3) studying diverse implementation pathways; (4) capitalizing on SSIs' transdiagnostic utility to broaden funding opportunities; and (5) educating ED researchers and clinicians about SSIs.

DISCUSSION

Understanding the strengths and limits of mechanism-targeted SSIs for ED-related problems could be a low-risk, high-reward avenue toward reducing EDs at scale.

PUBLIC SIGNIFICANCE

Most individuals experiencing EDs never access any form of treatment, creating an urgent need to identify ED interventions built to overcome barriers to engaging with care. This Forum article introduces SSIs as a promising path to rapidly developing and testing accessible, evidence-based ED supports; supplementing existing ED treatment models; and reducing the individual, familial, and societal burdens of EDs at scale.

Reciprocal association between session-by-session change in overvaluation of shape and weight and session-by-session change in bulimia nervosa symptoms during cognitive behavior therapies

Overvaluation of shape and weight (OSW) is supported as an important mechanism underlying improvement in bulimia nervosa (BN) during behavioral therapies (CBTs). It is not yet clear, however, whether changes in OSW temporally precede and prospectively predict changes in BN symptoms during CBTs, limiting the ability to establish causality. The present study is the first to examine whether session-by-session changes in OSW prospectively predict session-by-session changes in BN symptoms during CBTs and clinical outcomes at the end-of-treatment. Participants with BN (n = 44) who received 20 sessions of CBTs completed a brief survey at each session assessing OSW and BN symptom frequency during the past week. Results showed small but significant session-by-session reductions in OSW and BN symptoms during CBTs. Session-by-session improvements in OSW in any given week prospectively predicted reductions in restrictive eating, binge eating, and compulsive exercise in the following week but did not prospectively predict improvements in purging, while improvements in restrictive eating and compulsive exercise in any given week prospectively predicted reductions in OSW in the following week. Average session-by-session change in OSW during treatment was positively associated with remission status and improvements in eating pathology at the end-of-treatment. Changes in OSW temporally precede and prospectively predict changes in BN symptoms during CBTs, and vice versa. These findings may have critical implications for treatment planning and implementation.

Evidence that a novel transdiagnostic eating disorder treatment reduces reward region response to the thin beauty ideal and high-calorie binge foods

BACKGROUND

Findings from brain imaging studies with small samples can show limited reproducibility. Thus, we tested whether the evidence that a transdiagnostic eating disorder treatment reduces responsivity of brain valuation regions to thin models and high-calorie binge foods, the intervention targets, from a smaller earlier trial emerged when we recruited additional participants.

METHODS

Women with DSM-5 eating disorders (N = 138) were randomized to the dissonance-based body project treatment (BPT) or a waitlist control condition and completed functional magnetic resonance imaging (fMRI) scans assessing neural response to thin models and high-calorie foods at pretest and posttest.

RESULTS

BPT v. control participants showed significantly greater reductions in responsivity of regions implicated in reward valuation (caudate) and attentional motivation (precuneus) to thin v. average-weight models, echoing findings from the smaller sample. Data from this larger sample also provided novel evidence that BPT v. control participants showed greater reductions in responsivity of regions implicated in reward valuation (ventrolateral prefrontal cortex) and food craving (hippocampus) to high-calorie binge foods v. low-calorie foods, as well as significantly greater reductions in eating disorder symptoms, abstinence from binge eating and purging behaviors, palatability ratings for high calorie foods, monetary value for high-calorie binge foods, and significantly greater increases in attractiveness ratings of average weight models.

CONCLUSIONS

Results from this larger sample provide evidence that BPT reduces valuation of the thin ideal and high-calorie binge foods, the intervention targets, per objective brain imaging data, and produces clinically meaningful reductions in eating pathology.

Enhancing emotion regulation

BACKGROUND

Emotion regulation (ER) refers to the process of modulating an affective experience or response. Objectives: This is a systematic review of the research on therapist methods to facilitate patient ER, including affect-focused, experiential methods that aim to enhance immediate patient emotion regulation, and structured psychoeducation, skills training in ER.

METHOD

A total of 10 studies of immediate and intermediate outcomes of emotion regulation methods were examined. A total of 38 studies were included in the meta-analysis of distal treatment effects on emotion regulation.

RESULTS

In eight studies with 84 clients and 33 therapists, we found evidence of positive intermediate outcomes for affect-focused therapist methods and interpretations. A meta-analysis of 26 studies showed that the average effect size of ER methods from pre- to post-treatment was large (g = 0.82).

CONCLUSIONS

Both affect-focused and structured skill training are associated with distal improvements in emotion regulation. When working with ER in psychotherapy, therapists must consider how patients' cultural backgrounds inform display rules, as well as what might be considered adaptive or maladaptive. The article concludes with training implications and therapeutic practices based on the research evidence.

Adapting integrative cognitive-affective therapy for adolescents with full and subthreshold bulimia nervosa: A feasibility study

BACKGROUND

Integrative Cognitive Affective Therapy (ICAT) is an empirically supported treatment for bulimia nervosa (BN) in adults. However, it is unclear whether a modified version, Integrative Cognitive Affective Therapy-Adolescent (ICAT-A) is feasible and beneficial for adolescents. This study evaluated the feasibility of ICAT-A for adolescents with BN or subthreshold BN.

METHODS

Eight adolescents with BN or subthreshold BN (mean age = 16.1) were enroled in the study. At baseline and end of treatment, adolescents who participated in ICAT-A completed the Eating Disorder Examination (EDE) and self-report measures of eating disorder symptoms, depression, anxiety, self-esteem and functional impairment.

RESULTS

Retention for the intervention (75%) suggests that the majority of participants found the intervention acceptable. Although all treatment completers participated in the clinician-administered assessment (EDE), compliance with end of treatment self-report questionnaires was compromised by the COVID-19 pandemic, which occurred during the treatment course of the majority of the sample. At the end of treatment, all 6 adolescents who completed the ICAT-A intervention were in full eating disorder remission based on EDE scores, with large effect sizes identified for reductions in EDE global scores (d = 2.71), objective binge episodes (d = 0.91), subjective binge episodes (d = 1.06) and compensatory behaviours (d = 1.72).

CONCLUSION

Results suggest that ICAT-A is a feasible treatment that has promise for the treatment of adolescents with BN. Future studies are necessary to establish the efficacy of ICAT-A for adolescent BN.

Emotional dysregulation and linguistic patterns as a defining feature of patients in the acute phase of anorexia nervosa

PURPOSE

This research aims to analyze the relationship between emotional regulation and the symbolic process in autobiographical narratives of a group of individuals diagnosed with restrictive anorexia nervosa (AN), compared to a non-clinical group. The study is framed within multiple code theory (MCT) (Bucci, 1997; 2021), which considers mind-body integration. The purposes of this study are to investigate whether participants of the AN group will show greater alexithymia and emotional dysregulation than the non-clinical group; and whether the specific linguistic and symbolic features, such as somato-sensory words, affect words, and difficulty in the symbolizing process will predict the AN group.

METHODS

Twenty-nine female participants hospitalized with AN during an acute phase (mean age 19.8 ± 4.1) and 36 non-clinical female participants (mean age 21 ± 2.4) were selected through snow-ball sampling. The participants completed the Toronto Alexithymia Scale (TAS-20), the Profile of Mood of State (POMS), the Emotion Regulation Questionnaire (ERQ), and the Relationship Anecdotes Paradigm Interview (RAP). The RAP interview was audio-recorded and transcribed to apply the Referential Process (RP) Linguistic Measures. A T test for paired samples and a logistic binary regression was performed.

RESULTS

AN presented a significantly higher emotional dysregulation through the ERQ, TAS20 and POMS measures. Specifically, AN showed higher ER expression/suppression strategies, fewer functional cognitive strategies, higher alexithymia, and higher mood dysregulation. Specific linguistic features such as sensory-somatic, word affect, and difficulty in RP symbolizing predict the AN group (R2 = 0.349; χ2 = 27,929; df = 3; p = .001).

CONCLUSIONS

Emotional dysregulation is connected to AN symptoms and autobiographical narratives. The results can help a clinical assessment phase showing specific linguistic features in AN patients.

LEVEL OF EVIDENCE

Level II, controlled trial without randomization.

Traumatic stress, body shame, and internalized weight stigma as mediators of change in disordered eating: a single-arm pilot study of the Body Trust® framework

To enhance access to evidence-based treatment it is increasingly important to evaluate scalable virtual programs that support the needs of those struggling with disordered eating. This study described a scientifically grounded, trauma-informed framework known as Body Trust,® and aimed to pilot test the preliminary effectiveness and mechanisms of change in a Body Trust® program to improve disordered eating. Using quality outcomes data, we examined 70 mostly white (87%) female-identifying (97%) individuals enrolled in a 6-module online program based in the Body Trust® framework (M_age = 45.5 ±10.9; M_BMI = 33.7 ±8.0). Putative mediators included traumatic stress, internalized weight stigma, and body shame. Outcomes were objective and subjective binge episodes, overvaluation of weight and shape, and eating concerns. Generalized estimating equations were applied to determine pre-to-post changes. We applied Montoya's MEMORE macro, the joint-significance test, and calculated 95% Monte Carlo confidence intervals to assess mediation. Significant pre-to-post improvements with medium to large effect sizes were detected for all outcomes and mediators (ps<.008). All hypothesized mechanisms supported mediation. Using the Body Trust® framework shows early promise for alleviating disordered eating symptoms through targeting traumatic stress, body shame, and internalized weight stigma. Given the program's use of mindfulness techniques, future research should test target mechanisms like interoception.

Generalized network psychometrics of eating-disorder psychopathology

OBJECTIVE

As network models of eating disorder (ED) psychopathology become increasingly popular in modeling symptom interconnectedness and identifying potential treatment targets, it is necessary to contextualize their performance against other methods of modeling ED psychopathology and to evaluate potential ways to optimize and capitalize on their use. To accomplish these goals, we used generalized network psychometrics to estimate and compare latent variable models and network models, as well as hybrid models.

METHOD

We tested the structure of the Eating Pathology Symptoms Inventory (EPSI) and Eating Disorder Examination-Questionnaire (EDE-Q) in Recovery Record, Inc. mobile phone application users (N = 6856).

RESULTS

Although all models fit well, results favored a hybrid latent variable and network framework, which showed that ED symptoms fit best when modeled as higher-order constructs, rather than direct symptom-to-symptom connections, and when the relationships between those constructs are described as a network. Hybrid models in which latent factors were modeled as nodes within a network showed that EPSI Purging, Binge Eating, Cognitive Restraint, Body Dissatisfaction, and Excessive Exercise had high importance in the network. EDE-Q Eating Concern and Shape Concern were also important nodes. Results showed that the EPSI network was highly stable and replicable, whereas the EDE-Q network was not.

DISCUSSION

Integrating latent variable and network model frameworks enables tests of centrality to identify important latent variables, such as purging, that may promote the spread of ED psychopathology throughout a network, allowing for the identification of future treatment targets.

Bridging cognitive, phenomenological and psychodynamic approaches to eating disorders

Cognitive, psychodynamic, and phenomenological scholars converged their attention on abnormal bodily phenomena as the core psychopathological feature of eating disorders (EDs). While cognitive approaches focus their attention on a need for "objective" (i.e., observable, measurable) variables (including behaviours and distorted cognitions), the phenomenological exploration typically targets descriptions of persons' lived experience. According to a new emerging phenomenological perspective, the classic behavioural and cognitive symptoms of EDs should be considered as epiphenomena of a deeper core represented by a disorder of the embodiment. The cognitive-behavioural model is the most studied and, up till now, clinically efficacious treatment for EDs. However, as any coherent and scientifically grounded model, it presents some limitations in its application. Numerous patients report a chronic course, do not respond to treatment and develop a personality structure based on pathological eating behaviours, since "being anorexic" becomes a new identity for the person. Furthermore, the etiopathogenetic trajectory of EDs influences the treatment response: for example, patients reporting childhood abuse or maltreatment respond differently to cognitive-behavioural therapy. To obtain a deeper comprehension of these disorders, it seems important to shift attention from abnormal eating behaviours to more complex and subtle psycho(patho)logical features, especially experiential ones. This characterisation represents the unavoidable premise for the identification of new therapeutic targets and consequently for an improvement of the outcome of these severe disorders. Thus, the present review aims to provide an integrated view of cognitive, psychodynamic, and phenomenological perspectives on EDs, suggesting new therapeutic targets and intervention strategies based on this integrated model. Level of Evidence: Level V.Level of evidence Level V: Opinions of authorities, based on descriptive studies, narrative reviews, clinical experience, or reports of expert committees.

Associations between Schizotypal Facets and Symptoms of Disordered Eating in Women

Research has suggested that schizotypy-a personality organisation representing latent vulnerability for schizophrenia-spectrum disorders-may be elevated in women with symptoms of disordered eating. However, studies have not fully considered associations between symptoms of disordered eating and multidimensional schizotypy. To overcome this limitation, we asked an online sample of 235 women from the United States to complete measures of symptoms of disordered eating (drive for thinness, body dissatisfaction, and bulimic symptoms) and multidimensional schizotypy. Correlational analyses indicated significant associations between drive for thinness and bulimic symptoms, respectively, and most schizotypal facets. Body dissatisfaction was significantly associated with only two schizotypal facets. Overall, the strength of correlations was weak-to-moderate. Regression results indicated that only the schizotypal feature of excessive social anxiety was significantly associated with all risk for disordered eating factors. These results are consistent with aetiological models of disordered eating that highlight socio-affective difficulties as risk factors for symptoms of disordered eating.

Management of eating disorders for people with higher weight: clinical practice guideline

INTRODUCTION

The prevalence of eating disorders is high in people with higher weight. However, despite this, eating disorders experienced by people with higher weight have been consistently under-recognised and under-treated, and there is little to guide clinicians in the management of eating disorders in this population.

AIM

The aim of this guideline is to synthesise the current best practice approaches to the management of eating disorders in people with higher weight and make evidence-based clinical practice recommendations.

METHODS

The National Eating Disorders Collaboration Steering Committee auspiced a Development Group for a Clinical Practice Guideline for the treatment of eating disorders for people with higher weight. The Development Group followed the 'Guidelines for Guidelines' process outlined by the National Health and Medical Research Council and aim to meet their Standards to be: 1. relevant and useful for decision making; 2. transparent; 3. overseen by a guideline development group; 4. identifying and managing conflicts of interest; 5. focused on health and related outcomes; 6. evidence informed; 7. making actionable recommendations; 8. up-to-date; and, 9. accessible. The development group included people with clinical and/or academic expertise and/or lived experience. The guideline has undergone extensive peer review and consultation over an 18-month period involving reviews by key stakeholders, including experts and organisations with clinical academic and/or lived experience.

RECOMMENDATIONS

Twenty-one clinical recommendations are made and graded according to the National Health and Medical Research Council evidence levels. Strong recommendations were supported for psychological treatment as a first-line treatment approach adults (with bulimia nervosa or binge-eating disorder), adolescents and children. Clinical considerations such as weight stigma, interprofessional collaborative practice and cultural considerations are also discussed.

CONCLUSIONS

This guideline will fill an important gap in the need to better understand and care for people experiencing eating disorders who also have higher weight. This guideline acknowledges deficits in knowledge and consequently the reliance on consensus and lower levels of evidence for many recommendations, and the need for research particularly evaluating weight-neutral and other more recent approaches in this field.

Eating disorders and the nine symptoms of borderline personality disorder: A systematic review and series of meta-analyses

OBJECTIVE

Eating disorders and borderline personality disorder have high rates of comorbidity. However, the extent to which individual BPD symptoms are elevated in patients with EDs is largely unknown. Meta-analyses examined: (1) which of the nine BPD symptoms are especially elevated in individuals with versus without EDs, (2) whether particular ED subtypes have elevated levels of certain BPD symptoms, and (3) which BPD symptoms remain unstudied/understudied in relation to EDs.

METHODS

We performed nine separate meta-analyses (one for each BPD symptom) to compare levels of symptoms in patients with EDs versus healthy controls. A total of 122 studies (range = 4-34 studies across symptoms) were included.

RESULTS

Affective instability was the BPD symptom most elevated, while anger was the BPD symptom least elevated, in patients with EDs compared to controls. When comparing effect sizes across ED subtypes, anorexia nervosa binge-eating/purging subtype had the largest effect sizes for the greatest number of BPD symptoms, while effect sizes for AN restrictive subtype were not significantly larger than those of other EDs for any BPD symptom. The least studied BPD symptoms were identity disturbance and interpersonal difficulties.

DISCUSSION

These meta-analyses suggest that certain symptoms of BPD play a more prominent role in the comorbidity between BPD and EDs than others. Targeting affective instability when treating cases of comorbid ED and BPD may be especially likely to ameliorate the negative outcomes related to this comorbidity. Future research should further investigate identity disturbance and interpersonal difficulties in the context of EDs.

PUBLIC SIGNIFICANCE

Having an eating disorder and borderline personality disorder is a common comorbidity associated with a severe clinical presentation. BPD is characterized by nine distinct symptoms. This research examined levels of individual BPD symptoms in patients with versus without EDs. Findings can guide researchers and clinicians towards studying and treating symptoms that may be most relevant for BPD-ED comorbidity and in turn, improve outcomes for these patients.

Dialectical behavior therapy compared to cognitive behavior therapy in binge-eating disorder: An effectiveness study with 6-month follow-up

OBJECTIVE

To evaluate whether the results of a quasi-randomized study, comparing dialectical behavior therapy for binge-eating disorder (DBT-BED) and an intensive, outpatient cognitive behavior therapy (CBT+) in individuals with BED, would be replicated in a nonrandomized study with patients who more closely resemble everyday clinical practice.

METHOD

Patients with (subthreshold) BED (N = 175) started one of two group treatments: DBT-BED (n = 42) or CBT+ (n = 133), at a community eating disorder service. Measures of eating disorder pathology, emotion regulation, and general psychopathology were examined at end of treatment (EOT) and at 6-month follow-up using generalized linear models with multiple imputation.

RESULTS

Both treatments lead to substantial decreases on primary and secondary measures. Statistically significant, medium-size differences between groups were limited to global eating disorder psychopathology (d = -.62; 95% CI = .231, .949) at EOT and depressive symptoms at follow-up (d = -.45; 95% CI = .149, 6.965), favoring CBT+. Dropout of treatment included 15.0% from CBT+ and 19.0% from DBT-BED (difference nonsignificant).

DISCUSSION

Decreases in global eating disorder psychopathology were achieved faster with CBT+. Overall, improvements in DBT-BED were comparable to those observed in CBT+. Findings of the original trial, favoring CBT+ on the number of OBE episodes, emotional dysregulation and self-esteem at EOT, and on eating disorder psychopathology and self-esteem at follow-up, were not replicated. With similar rates of treatment dropout and about half of the therapy time used in CBT+, DBT-BED can be considered a relevant treatment for BED in everyday clinical practice.

PUBLIC SIGNIFICANCE

In this effectiveness study, dialectical behavior therapy (DBT) resulted in clinically relevant improvements in individuals with binge eating disorder. Changes were broadly comparable to those of cognitive behavior therapy (CBT), the current treatment of choice. Although CBT resulted in decreases in eating disorder psychopathology faster, there was a trend toward relapse in CBT at 6-month follow-up. Therefore, the less costly DBT-program can be considered a relevant treatment in clinical practice.

The mediating role of self-criticism, experiential avoidance and negative urgency on the relationship between ED-related symptoms and difficulties in emotion regulation

OBJECTIVE

Difficulties in emotion regulation are thought to play a transdiagnostic role across eating disorders (ED). In the current study, we explored with a path analysis the mediating role of self-criticism, experiential avoidance and negative urgency on the relationship between ED-related symptoms and dimensions of difficulties in emotion regulation.

METHOD

Participants were 103 female outpatients recruited at a Portuguese ED hospital unit, diagnosed with an ED, aged 14-60 years old (M = 28.0, SD = 10.5), body mass index (BMI) ranging from 11.72 to 39.44 (M = 20.1, SD = 5.4).

RESULTS

The path analysis resulted in a model with an adequate fit to the data (SRMR = 0.05; RMSEA = 0.07 [0.00, 0.12], PCLOSE = 0.269; TLI = 0.97; IFI = 0.99; GFI = 0.95). A final model in which the relationship between ED-related symptoms and dimensions of difficulties in emotion regulation was mediated by self-criticism, experiential avoidance and negative urgency, accounted for a variance of 71% for strategies, 57% for non-acceptance, 62% for impulses, 56% for goals and 20% for clarity.

CONCLUSION

Results suggest that self-criticism, experiential avoidance and negative urgency, combined, are relevant in the relationship between ED-related symptoms and difficulties in emotion regulation. ED treatment and emotion regulation skills may be enhanced through the inclusion of specific components that target self-criticism, experiential avoidance and negative urgency, as they become prominent during the therapeutic process.

An exploratory investigation of predictors of outcome in face-to-face and online cognitive-behavioural therapy for bulimia nervosa

OBJECTIVE

Cognitive-behavioural therapy (CBT) delivered face-to-face and via the internet reduces bulimia nervosa (BN) symptoms. However, our empirical understanding of factors affecting patient outcomes is limited.

METHOD

Using data from a randomised, controlled trial comparing internet-based (CBT4BN, n = 78) with face-to-face (CBTF2F, n = 71) group CBT (97% female, M = 28 years), we examined general treatment (across conditions) and modality-specific predictors of end-treatment and 1-year outcomes (abstinence, binge-eating frequency, purging frequency).

RESULTS

Improved eating disorder-related quality of life (EDQOL) during treatment and follow-up predicted abstinence at end-treatment and 1-year assessments. Improved EDQOL, disordered eating cognitions, and anxiety symptoms predicted less frequent binge eating and purging. Previous CBT and being employed predicted more frequent binge eating and purging at both assessments. Higher self-transcendence and self-directedness predicted less frequent binge eating. More severe binge eating and purging at baseline and end-treatment predicted more frequent binge eating and purging at subsequent assessments. Improved EDQOL was more strongly associated with positive outcome in CBT4BN; improved depressive symptoms and health-related QOL predicted positive outcome in CBT4BN but not CBTF2F.

DISCUSSION

Symptom improvement and certain character traits predicted positive outcome, whereas more severe presentation and prior CBT experience predicted poorer outcome. Consideration of intreatment symptom improvement may facilitate care recommendations, particularly for internet-based modalities.

Comparing the effectiveness and predictors of cognitive behavioural therapy-enhanced between patients with various eating disorder diagnoses: a naturalistic study

Cognitive behaviour therapy-enhanced (CBT-E) is an effective treatment for non-underweight patients with eating disorders. Its efficacy and effectiveness is investigated mostly among transdiagnostic samples and remains unknown for binge eating disorder. The aim of the present study was to assess several treatment outcome predictors and to compare effectiveness of CBT-E among adult out-patients with bulimia nervosa (n=370), binge eating disorder (n=113), and those with a restrictive food pattern diagnosed with other specified feeding and eating disorders (n=139). Effectiveness of CBT-E was assessed in routine clinical practice in a specialised eating disorders centre. Eating disorder pathology was measured with the EDEQ pre- and post-treatment, and at 20 weeks follow-up. Linear mixed model analyses with fixed effect were performed to compare treatment outcome among the eating disorder groups. Several predictors of treatment completion and outcome were examined with a regression analysis. No predictors for drop-out were found, except the diagnosis of bulimia nervosa. Eating disorder pathology decreased among all groups with effect sizes between 1.43 and 1.70 on the EDE-Q total score. There were no differences in remission rates between the three groups at end of treatment or at follow-up. Eating disorder severity at baseline affected treatment response. The results can be generalised to other specialised treatment centres. No subgroup of patients differentially benefited from CBT-E supporting the transdiagnostic perspective for the treatment of eating disorders. Longer-term follow-up data are necessary to measure persistence of treatment benefits.

Key learning aims

(1)

A systematic review of sociodemographic reporting and representation in eating disorder psychotherapy treatment trials in the United States

OBJECTIVE

Eating disorders (EDs) were once conceptualized as primarily affecting affluent, White women, a misconception that informed research and practice for many years. Abundant evidence now discredits this stereotype, but it is unclear if prevailing "evidence-based" treatments have been evaluated in samples representative of the diversity of individuals affected by EDs. Our goal was to evaluate the reporting, inclusion, and analysis of sociodemographic variables in ED psychotherapeutic treatment randomized controlled trials (RCTs) in the US through 2020.

METHODS

We conducted a systematic review of ED psychotherapeutic treatment RCTs in the US and examined the reporting and inclusion of gender identity, age, race/ethnicity, sexual orientation, and socioeconomic status (SES) of enrolled participants, as well as recruitment methods, power analyses, and discussion of limitations and generalizability.

RESULTS

Our search yielded 58 studies meeting inclusion criteria dating back to 1985. Reporting was at times incomplete, absent, or centered on the racial/gender majority group. No studies reported gender diverse participants, and men and people of color were underrepresented generally, with differences noted across diagnoses. A minority of papers considered sociodemographic variables in analyses or acknowledged limitations related to sample characteristics. Some progress was made across the decades, with studies increasingly providing full racial and ethnic data, and more men included over time. Although racial and ethnic diversity improved somewhat, progress appeared to stall in the last decade.

DISCUSSION

We summarize findings, consider context and challenges for RCT researchers, and offer suggestions for researchers, journal editors, and reviewers on improving representation, reporting, and analytic practices.

PUBLIC SIGNIFICANCE

Randomized controlled trials of eating disorder psychotherapeutic treatment in the US are increasingly reporting full race/ethnicity data, but information on SES is inconsistent and sexual orientation absent. White women still comprise the overwhelming majority of participants, with few men and people of color, and no gender-diverse individuals. Findings underscore the need to improve reporting and increase representation to ensure evidence-based treatments are effective across and within diverse groups.

Exploring changes in alexithymia throughout intensive dialectical behavior therapy for eating disorders

OBJECTIVE

Alexithymia is proposed as a prominent clinical feature of eating disorders (EDs). However, despite theoretical reason to believe that alexithymia could interfere with the success of treatments, few studies have tested whether alexithymia changes over the course of treatment. The goals of the current study were to evaluate (a) changes in alexithymia over the course of intensive Dialectical Behaviour Therapy (DBT) for EDs, and (b) associations between alexithymia and ED symptoms over time.

METHOD

A mixed-diagnostic group of patients with EDs (N = 894) completed the Eating Disorders Examination-Questionnaire (EDE-Q) and the Toronto Alexithymia Scale (TAS-20) throughout intensive treatment and at various lengths of follow-up (6, 12, 24 months).

RESULTS

Results suggested that even after controlling for relevant covariates, there were significant decreases in alexithymia from intake to discharge and discharge to follow-up. Models exploring changes in self-reported ED symptoms indicated that TAS-20 scores significantly related to ED symptoms across timepoints, such that greater alexithymia was associated with greater severity of symptoms.

CONCLUSIONS

Altogether, findings support an association between alexithymia and ED symptoms over treatment and suggest that emotion-focussed therapies like DBT may result in decreases in alexithymia. Future research should explore whether this effect is consistent across therapies without an emotional focus.

Micro-level de-coupling of negative affect and binge eating in relationship to macro-level outcomes in binge eating disorder treatment

BACKGROUND

While negative affect reliably predicts binge eating, it is unknown how this association may decrease or 'de-couple' during treatment for binge eating disorder (BED), whether such change is greater in treatments targeting emotion regulation, or how such change predicts outcome. This study utilized multi-wave ecological momentary assessment (EMA) to assess changes in the momentary association between negative affect and subsequent binge-eating symptoms during Integrative Cognitive Affective Therapy (ICAT-BED) and Cognitive Behavior Therapy Guided Self-Help (CBTgsh). It was predicted that there would be stronger de-coupling effects in ICAT-BED compared to CBTgsh given the focus on emotion regulation skills in ICAT-BED and that greater de-coupling would predict outcomes.

METHODS

Adults with BED were randomized to ICAT-BED or CBTgsh and completed 1-week EMA protocols and the Eating Disorder Examination (EDE) at pre-treatment, end-of-treatment, and 6-month follow-up (final N = 78). De-coupling was operationalized as a change in momentary associations between negative affect and binge-eating symptoms from pre-treatment to end-of-treatment.

RESULTS

There was a significant de-coupling effect at follow-up but not end-of-treatment, and de-coupling did not differ between ICAT-BED and CBTgsh. Less de-coupling was associated with higher end-of-treatment EDE global scores at end-of-treatment and higher binge frequency at follow-up.

CONCLUSIONS

Both ICAT-BED and CBTgsh were associated with de-coupling of momentary negative affect and binge-eating symptoms, which in turn relate to cognitive and behavioral treatment outcomes. Future research is warranted to identify differential mechanisms of change across ICAT-BED and CBTgsh. Results also highlight the importance of developing momentary interventions to more effectively de-couple negative affect and binge eating.

Protection versus risk? The relative roles of compassionate and uncompassionate self-responding for eating disorder behaviors

Research demonstrates the protective role of self-compassion for eating disorder symptoms. However, studies investigating self-compassion most often use the Self-Compassion Scale, which aggregates the distinct but related constructs of compassionate and uncompassionate self-responding. This study examined differential associations of compassionate and uncompassionate self-responding with positive and negative affect and with a range of eating disorder behaviors (i.e., binge eating, purging, dietary restriction, and excessive exercise). Participants were 547 undergraduate students (59% women, M_age = 20.49, SD_age = 1.83) who completed measures of self-compassion, trait affect, and eating disorder behaviors. Compassionate and uncompassionate self-responding were moderately negatively correlated (rs = -0.41 and -0.33, among women and men, respectively). Compassionate self-responding was more strongly related to positive affect, and uncompassionate self-responding was more strongly related to negative affect. Among women, uncompassionate self-responding was related to all eating disorder behaviors controlling for compassionate self-responding, whereas compassionate self-responding was not uniquely related to any eating disorder behavior. Among men, a similar pattern emerged, except that only compassionate self-responding related uniquely to excessive exercise. Results are consistent with studies showing that the presence of uncompassionate self-responding might outweigh the absence of compassionate self-responding in explaining psychopathology. Findings highlight the potential importance of primarily targeting uncompassionate self-responding in eating disorder interventions.

The role of embodiment in the treatment of patients with anorexia and bulimia nervosa: a 2-year follow-up study proposing an integration between enhanced cognitive behavioural therapy and a phenomenological model of eating disorders

PURPOSE

Recent studies demonstrated that the embodiment disorder represents a core feature of eating disorders (EDs). The aim of this study was to evaluate the role of its variation as a possible mediator of the efficacy of enhanced cognitive behavioural therapy (CBT-E) on classic ED symptomatology, including body uneasiness.

METHODS

73 patients with anorexia nervosa and 68 with bulimia nervosa were treated with a multidisciplinary approach including CBT-E. Psychometric questionnaires were administered at baseline (T0) and after one (T1) and 2 years (T2) to evaluate general and ED-specific psychopathology, body uneasiness and the embodiment disorder. Data regarding diagnostic crossover and remission were also collected.

RESULTS

Longitudinal analysis showed an improvement of all psychopathological dimensions at T1, which remained stable at T2 (p < 0.05). Remission rate at T2 was 44.7%, and diagnostic crossover occurred in 17.0% of patients. Higher levels of embodiment disorder predicted increased diagnostic instability (OR: 1.80 [1.01-3.20], p = 0.045). The amelioration of the embodiment disorder mediated the decrease in both ED-specific psychopathology (indirect effect: 0.67 [0.46-0.92]) and body uneasiness (indirect effect: 0.43 [0.28-0.59]).

CONCLUSION

For the first time, these findings highlighted the role of the embodiment disorder as a maintaining factor of ED symptomatology, supporting the importance of integrating CBT-E with a phenomenological model of EDs.

LEVEL OF EVIDENCE

Level IV, longitudinal observational study (case series).

Treatment fidelity in eating disorders and psychological research: Current status and future directions

OBJECTIVE

The evaluation and use of treatment fidelity procedures are rare in the development and implementation of psychological interventions. This article aims to review the construct of treatment fidelity, highlight limitations to currently available measures, and introduce a conceptual framework for studying and adapting fidelity measures in clinical research and practice using eating disorders as an example.

METHOD

As treatment fidelity assesses whether an intervention was delivered as intended, we operationalized this construct as: (a) treatment adherence, (b) therapist competence, and (c) treatment differentiation.

RESULTS

There is a significant gap in the literature assessing and documenting treatment fidelity. Available studies indicate that existing adherence measures can be time consuming, costly, and are not widely used in the field. Furthermore, therapist competence is a complex and context-dependent construct that is challenging to measure. Finally, treatment differentiation is often inferred by ensuring adherence.

DISCUSSION

The development of simplified formal tests of treatment fidelity would help draw conclusions about treatment efficacy and improve the dissemination and implementation of interventions to promote optimal clinical outcomes.

Multi-state modeling of thought-shape fusion using ecological momentary assessment

Body dissatisfaction (BD) and preoccupation with thoughts of food (PTF) are intertwined and are components of thought-shape fusion. Thought-shape fusion describes the process by which PTF lead to beliefs about weight and shape. To study thought-shape fusion in daily life and explore various transitions between BD and PTF, 30 women with binge eating completed ecological momentary assessment for 14 days. BD and PTF were assessed using continuous rating scales at each prompt. Multi-state modeling, which analyzes micro-temporal transitions between discrete states, was used to examine transitions among four states created with BD and PTF ratings. The four states included low BD/low PTF, low BD/high PTF, high BD/low PTF, and high BD/high PTF. Affect and disordered eating were examined as covariates of state transitions. Results showed high BD states were self-perpetrating, such that when in high BD states, transition to low BD states were less likely. Regarding covariates, positive affect buffered against maladaptive transitions whereas negative affect and disordered eating increased risk. Findings highlighted high BD states as influential, and negative affect and disordered eating as risk factors and positive affect as preventive. This study enhances theory of thought-shape fusion and implicates transitions from BD to PTF as possible underlying transitions.

Functional assessment of restrictive eating: A three-study clinically heterogeneous and transdiagnostic investigation

Restrictive eating is common and associated with negative psychological outcomes across the life span and eating disorder (ED) severity levels. Little is known about functional processes that maintain restriction, especially outside of narrow diagnostic categories (e.g., anorexia nervosa). Here, we extend research on operant four-function models (identifying automatic negative, automatic positive, social negative, and social positive reinforcement functions) that have previously been applied to nonsuicidal self-injury (NSSI), binge eating, and purging to restricting. We assessed restrictive eating functions in three samples: clinically heterogeneous adolescents (Study 1: N = 457), transdiagnostic adults (Study 2: N = 145), and adults with acute or recently weight-restored anorexia nervosa (Study 3: N = 45). Study 1 indicated the four-function model was a good fit for restricting (root mean square error of approximation [RMSEA] = .06, Tucker-Lewis index [TLI] = .88). This factor structure replicated in Study 2 (comparative fit index [CFI] = .97, RMSEA = .07, TLI = .97, standardized root mean square residual [SRMR] = .09). Unlike NSSI, binge eating, and purging, which have been found to primarily serve automatic negative reinforcement functions, all three present studies found automatic positive reinforcement was most highly endorsed (by up to 85% of participants). In Studies 1 and 3, automatic functions were associated with poorer emotion regulation (ps < .05). In Study 1, social functions were associated with less social support (ps < .001). Across studies, automatic functions were associated with greater restriction ps < .05). Functions varied slightly by ED diagnosis. Across ED presentation, severity, and developmental stage, restrictive eating may be largely maintained by automatic positive reinforcement, with some variability across presentations. Continued examination of restrictive eating functions will establish processes that maintain restriction, allowing more precise treatment targeting for these problematic behaviors. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

The roles of weight stigma, emotion dysregulation, and eating pathology in suicide risk

Using an interpersonal theory of suicide and affect regulation framework, we investigated the relationships between perceived burdensomeness, thwarted belongingness, weight stigmatization, emotion dysregulation, eating pathology, and suicide risk. Three main hypotheses were investigated. First, we predicted a positive linear relationship between weight stigmatization and risk. Second, an indirect effect of weight stigmatization on risk via perceived burdensomeness and thwarted belongingness was posited. Third, we hypothesized that weight stigmatization would indirectly affect suicide risk via emotion dysregulation and eating pathology. Undergraduates (N = 156) completed online surveys. Linear regressions and indirect effect analyses were performed. Weight stigmatization was directly, positively associated with increased suicide risk. Weight stigmatization indirectly affected suicide risk via perceived burdensomeness but not thwarted belongingness. Higher stigmatization was associated with higher levels of perceived burdensomeness, which was associated with higher risk. An indirect effect of weight stigmatization on suicide risk through emotional dysregulation emerged. Higher weight stigmatization was associated with higher emotional dysregulation, which was associated with higher suicide risk. When all models were combined, only an indirect effect via perceived burdensomeness remained. Our findings may have clinical and public health implications for suicide prevention among people with weight stigma-related risk factors.

Factors that predict persistence versus non-persistence of eating disorder Symptoms: A prospective study of high-risk young women

Investigate baseline factors that prospectively predict persistence versus non-persistence of behavioral and cognitive eating disorder symptoms because knowledge of maintenance factors, which is limited, could inform the design of more effective eating disorder treatments. Data from 4 prevention trials that targeted young women with body image concerns (N = 1952; M age 19.7, SD 5.7) and collected interview-assessed data on behavioral and cognitive symptoms over 1-year follow-up were combined to address this aim. Greater binge eating severity predicted binge eating persistence. Greater dieting, binge eating frequency and severity, weight/shape overvaluation, and feeling fat predicted compensatory behavior persistence. Lower BMI predicted low BMI persistence. Greater thin-ideal internalization, body dissatisfaction, dieting, negative affect, binge eating frequency, binge eating severity, compensatory behaviors, weight/shape overvaluation, fear of fatness or weight gain, and feeling fat predicted weight/shape overvaluation persistence. Greater thin-ideal internalization, dieting, compensatory behaviors, weight/shape overvaluation, fear of fatness or weight gain, and feeling fat predicted persistence of fear of fatness or weight gain. Results provide support for intervention targets of several extant eating disorder treatments and identified novel maintenance factors not commonly targeted in treatments (e.g., negative affect). Results also imply that certain features of eating disorders predict symptom persistence.

Implementing evidence-based individual psychotherapies for adults with eating disorders in a real world clinical setting

OBJECTIVE

This study aimed to evaluate the effectiveness of evidenced-based psychological treatments (specifically, Cognitive-Behaviour Therapy for Eating Disorders [CBT-ED] and Maudsley Anorexia Nervosa Treatment for Adults [MANTRA]) for a transdiagnostic eating disorder population in a routine clinical setting. In particular, it aimed to determine the extent to which treatment was provided in line with current clinical guidelines (NICE, 2017) and how effective treatment was in improving eating disorder and general psychopathology.

METHOD

Three hundred and seventy-nine participants meeting criteria for DSM-5 anorexia nervosa, bulimia nervosa, binge-eating disorder or other specified feeding or eating disorder completed pre- and posttreatment measures of eating disorder pathology and general distress. Clinicians recorded weight and episodes of bingeing and purging.

RESULTS

Ninety seven percent of participants received treatment in line with evidence-based psychotherapies. Treatment was completed by 59.9% of the whole sample. Using stringent criteria and ITT analysis 21.4% met criteria for remission at end of treatment. In the underweight sample, there was a significant increase in BMI, averaging 1.38 kg/m² over treatment, with similar outcomes for MANTRA and CBT-ED.

DISCUSSION

These findings, in a large transdiagnostic population, add to emerging literature on the translation of evidence-based psychotherapies to real-world clinical settings. Our results converge well with prior similar studies. Findings highlight the need for routine data collection in services and for the ongoing improvement of treatments for the eating disorders.

Mindfulness and acceptance-based behavioral treatment for bulimia-spectrum disorders: A pilot feasibility randomized trial

OBJECTIVE

Although existing research supports the efficacy of mindfulness- and acceptance-based treatments (MABTs) for eating disorders (EDs), few studies have directly compared outcomes from MABTs to standard CBT.

METHOD

Participants (N = 44), treatment-seeking adults with bulimia-spectrum EDs, were screened for eligibility, consented, and randomized to receive 20 sessions of outpatient, individual CBT or MABT treatment. Treatment outcomes (binge eating and compensatory behavior episodes, global ED severity, depressive symptoms, quality of life, emotional awareness/clarity, distress tolerance, values-based decision-making, and emotion modulation) were measured at pre-treatment, post-treatment, and 6-month follow up. Data on feasibility and acceptability are also presented.

RESULTS

Treatment and assessment retention rates were comparable between MABT and CBT (p range = .51-.73) and between-group differences on acceptability measures were very small (d range = 0.03-0.19). Both conditions produced notable and generally comparable changes in most treatment outcomes at post-treatment (within group d range = 0.06-1.77).

DISCUSSION

The MABT and CBT conditions demonstrated comparable degrees of feasibility, acceptability, and symptom improvement, suggesting that MABTs warrant further evaluation as ED treatments.

Third-wave interventions for eating disorders in adolescence - systematic review with meta-analysis

CONTEXT

Third-wave therapies have demonstrated efficacy as a treatment option for EDs in adulthood. Data on the suitability for EDs in adolescence are lacking.

OBJECTIVE

To estimate the efficacy of third-wave interventions to reduce ED symptoms in adolescents in randomized controlled trials (RCTs) and uncontrolled studies.

DATA SOURCES

We systematically reviewed the databases PubMed (1976-January 2021), PsycINFO (1943-January 2021), and the Cochrane database (1995-January 2021) for English-language articles on third-wave therapies. References were screened for further publications of interest.

STUDY SELECTION

RCTs and pre-post studies without control group, comprising patients aged 11-21 years (mean age = 15.6 years) with an ED diagnosis (anorexia nervosa, bulimia nervosa, binge eating disorder, eating disorder not otherwise specified) investigating the efficacy of third-wave psychological interventions were included. Efficacy had to be evaluated according to the Eating Disorder Examination or Eating Disorder Examination-Questionnaire, the Eating Disorder Inventory-2, the Eating Disorder Inventory-3, or the Structured Interview for Anorexic and Bulimic Disorders for DSM-IV and ICD-10. The outcome assessed in the meta-analysis was the EDE total score.

DATA EXTRACTION

Independent extraction of data by two authors according to a pre-specified data extraction sheet and quality indicators.

DATA SYNTHESIS

We identified 1000 studies after removal of duplicates, assessed the full texts of 48 articles for eligibility, and included 12 studies with a total of 487 participants (female 97.3%/male 2.6%) in the qualitative synthesis and seven studies in the meta-analysis. Articles predominantly reported uncontrolled pre-post trials of low quality, with only two published RCTs. Treatments focused strongly on dialectical behaviour therapy (n = 11). We found moderate effects of third-wave therapies on EDE total score interview/questionnaire for all EDs (d = - 0.67; z = - 5.53; CI95% = - 0.83 to - 0.59). Descriptively, the effects appeared to be stronger in patients with BN and BED.

CONCLUSION

At this stage, it is not feasible to draw conclusions regarding the efficacy of third-wave interventions for the treatment of EDs in adolescence due to the low quality of the empirical evidence. Since almost all of the identified studies used DBT, it is unfortunately not possible to assess other third-wave treatments' efficacy.

Is personality the key in cognitive-behavioural therapy for eating disorders? A review

The efficacy of individual cognitive-behavioural therapy (CBT) for eating disorders can be assessed by investigating the potential predictors, mediators and moderators of treatment. The present review focused on personality since its crucial role has been emphasized both by research and practice. Sixteen studies were collected, and data were extracted through a highly operationalized coding system. Overall, personality disorders were the most investigated construct; however, their influence was somewhat contradictory. A more cogent result occurred for borderline personality disorder (BPD) when considered as a moderator (not a predictor nor a mediator). Patients with a more disturbed borderline personality benefited to a greater extent from treatments including booster modules on affects, interpersonal relationships and mood intolerance, rather than symptoms exclusively. Nine additional personality dimensions, beyond BPD, were investigated sparsely, and results regarding them were barely indicative in this review. However, some of these dimensions (e.g., affective lability and stimulus-seeking behaviours) could be traced back to BPD, thereby strengthening evidence of the role of borderline disorder as a moderator. Although research on the relationship between personality and eating disorders needs to be increased and methodologically improved, personality, taken as a whole, emerged as a promising variable for enhancing the efficacy of CBT.

Relationships between nonappearance self-discrepancy, weight discrepancy, and binge eating disorder symptoms

PURPOSE

Self-discrepancy (i.e., perceived differences between one's actual self and personal standards) has been associated with binge eating disorder (BED) symptoms. However, little is known about how weight discrepancy (i.e., the difference between one's actual and ideal weights) interacts with or is distinguished from nonappearance self-discrepancy (discrepancy unrelated to weight or shape) in predicting BED severity. The current study examined how these two forms of discrepancy independently and interactively relate to BED and associated symptoms to elucidate how facets of self-discrepancy may operate to precipitate and maintain BED.

METHODS

Adults with BED (N = 111) completed questionnaires and interviews prior to treatment that assessed self-discrepancy (computerized selves) and weight discrepancy (assessed during the Eating Disorder Examination [EDE]) as predictors of global eating disorder (ED) symptomatology (EDE Global score), depression (Beck Depression Inventory), anxiety (State-Trait Anxiety Inventory), self-esteem (Rosenberg Self-Esteem Scale), and ED-related impairment (Clinical Impairment Assessment).

RESULTS

Multivariate regression models indicated nonappearance self-discrepancy and weight discrepancy were not significantly related to the severity of global ED symptoms, but both independently predicted impairment (ps < 0.05). Nonappearance self-discrepancy, but not weight discrepancy, was also associated with higher depression (p = 0.001), anxiety (p < 0.001), and lower self-esteem (p < 0.001).

CONCLUSION

These findings suggest distinct associations of weight discrepancy and nonappearance self-discrepancy with ED and related symptoms, as well as each of these constructs' relevance to everyday functioning in BED. The results also highlight potential avenues for future research to examine mechanistic pathways by which self-discrepancy influences BED severity.

LEVEL OF EVIDENCE

V, descriptive cross-sectional study.

The factorial structure and psychometric properties of the Committed Action Questionnaire (CAQ-8) in a Portuguese clinical sample with eating disorders

The Committed Action Questionnaire (CAQ-8) is an instrument developed to measure committed action, an adaptive psychological process. The main goal in the current study was to confirm the factorial structure of the Portuguese version of the CAQ-8 in a transdiagnostic clinical sample of participants diagnosed with an eating disorder (ED). Participants were 102 female outpatients (M_age  = 28.1, SD = 10.6; M_BMI  = 20.0, SD = 5.5) recruited from a clinical setting specialized in the treatment of ED. Confirmatory factor analysis (CFA) was used to confirm the CAQ-8's factorial structure. Both first- and second-order models revealed adequate goodness-of-fit indices (e.g. χ² /df = 1.545, p = .06; SRMR = 0.049; RMSEA = 0.073; CFI/TLI > 0.95). A moderation model revealed that the conditional effect of weight, shape and eating concerns on experiential avoidance was significantly moderated by increased levels of committed action, F(3, 97) = 23.79, p < .001, accounting for 42% of the final variance. The present study supports the usefulness of the CAQ-8 as a measure of levels of committed action with patients diagnosed with an ED.

A meta-analytic review of trials that tested whether eating disorder prevention programs prevent eating disorder onset

This report provides a review of randomized controlled trials that tested whether an eating disorder prevention program significantly reduced future onset of eating disorders, which is important because eating disorders are common and result in marked functional impairment. We identified 15 trials involving 5080 participants (mean ages ranging from 14.5 to 22.3) that reported 19 tests of whether selective eating disorder prevention programs significantly reduced future onset of eating disorders relative to some type of minimal control condition or a credible alternative intervention. Healthy lifestyle modification prevention programs, dissonance-based prevention programs, and a self-esteem/self-efficacy prevention program significantly reduced future onset of eating disorders, though the later was only evaluated in one trial. Psychoeducational, cognitive behavioral, behavioral weight gain, interpersonal, and family-therapy-based prevention programs did not significantly reduce future onset of eating disorders. The average prevention effect size was statistically significant (OR = 1.64, 95% CI = [1.09, 2.46], t = 2.54, p = .020) and there was heterogeneity in effect sizes (Q [18] = 35.96, p = .007). Prevention effects were significantly larger for trials that recruited participants with elevations on a single risk factor versus with elevations in multiple risk factors and for healthy lifestyle modification prevention programs versus cognitive behavioral prevention programs, though the remaining examined factors did not moderate intervention effect sizes (e.g., risk of bias). The fact that lifestyle modification and dissonance-based prevention programs significantly reduced future onset of eating disorders in multiple trials, producing a 54% to 77% reduction in future eating disorder onset implies that broadly implementing these prevention programs could reduce the population prevalence of eating disorders.

Self-reported emotion regulation difficulties in psychosis: Psychometric properties of the Difficulties in Emotion Regulation Scale (DERS-16)

OBJECTIVE

Individuals with psychosis self-report difficulties in understanding, relating, and responding to emotions as treatment priorities, yet we lack comprehensive, reliable, and valid assessments for routine clinical use.

METHODS

The psychometric properties of a brief version of the Difficulties in Emotion Regulation Scale-16 (DERS-16) were examined using anonymized data from a sample of 150 outpatients with psychosis.

RESULTS

Confirmatory factor analysis supported the five-factor structure of the DERS-16. The model fit was further improved by omitting two items. Measurement invariance was shown with respect to age and gender. The DERS-16 demonstrated good internal consistency, well comparable to the original DERS. Evidence toward convergent validity is also presented.

CONCLUSION

Findings suggest that the DERS-16 is a reliable and valid measure of self-reported emotion regulation difficulties in individuals with psychosis. Further research on the clinical utility of the DERS-16 is needed, including examination of its test-retest reliability and predictive validity in response to targeted interventions.

Cognitive Behavioral Therapy for the Eating Disorders

Research findings strongly suggest that cognitive behavioral therapy for the eating disorders (CBT-ED) is more effective than other treatments for bulimia nervosa (BN) and for binge eating disorder (BED), although interpersonal psychotherapy appears to be equally effective for BED. Evidence for the effectiveness of CBT-ED for the persistent (adult) form of anorexia nervosa (AN) is insufficient at present and is essentially absent for AN in adolescents except for some evidence from uncontrolled trials. This article begins with an overview of the early studies in the development of CBT-ED that showed a similar effectiveness of other symptom-focused psychotherapies-a finding that was neglected at the time. Later developments are then considered, including comparisons of CBT-ED with other psychotherapies, efforts to develop Internet-based training and treatment, and electronic applications for treatment. Finally, implications of the findings for future short- and long-term research and for clinical practice are considered.

Converging vulnerability factors for compulsive food and drug use

Highly palatable foods and substance of abuse have intersecting neurobiological, metabolic and behavioral effects relevant for understanding vulnerability to conditions related to food (e.g., obesity, binge eating disorder) and drug (e.g., substance use disorder) misuse. Here, we review data from animal models, clinical populations and epidemiological evidence in behavioral, genetic, pathophysiologic and therapeutic domains. Results suggest that consumption of highly palatable food and drugs of abuse both impact and conversely are regulated by metabolic hormones and metabolic status. Palatable foods high in fat and/or sugar can elicit adaptation in brain reward and withdrawal circuitry akin to substances of abuse. Intake of or withdrawal from palatable food can impact behavioral sensitivity to drugs of abuse and vice versa. A robust literature suggests common substrates and roles for negative reinforcement, negative affect, negative urgency, and impulse control deficits, with both highly palatable foods and substances of abuse. Candidate genetic risk loci shared by obesity and alcohol use disorders have been identified in molecules classically associated with both metabolic and motivational functions. Finally, certain drugs may have overlapping therapeutic potential to treat obesity, diabetes, binge-related eating disorders and substance use disorders. Taken together, data are consistent with the hypotheses that compulsive food and substance use share overlapping, interacting substrates at neurobiological and metabolic levels and that motivated behavior associated with feeding or substance use might constitute vulnerability factors for one another. This article is part of the special issue on 'Vulnerabilities to Substance Abuse'.

The Renfrew Unified Treatment for Eating Disorders and Comorbidity: Long-Term Effects of an Evidence-Based Practice Implementation in Residential Treatment

Background: The Renfrew Unified Treatment for Eating Disorders and Comorbidity (UT) is a transdiagnostic, emotion-focused treatment adapted for use in residential group treatment. This study examined the effect of UT implementation across five years of treatment delivery. Methods: Data were collected by questionnaire at admission, discharge (DC), and 6-month follow-up (6MFU). Patient outcomes were measured by the Eating Disorder Examination-Questionnaire, Center for Epidemiologic Studies-Depression Scale, Brief Experiential Avoidance Questionnaire (BEAQ), Anxiety Sensitivity Index, and Southampton Mindfulness Scale. Data were analyzed for N = 345 patients treated with treatment-as-usual (TAU), and N = 2,763 treated with the UT in subsequent years. Results: Results from multilevel models demonstrated a significant interaction between implementation status (TAU vs. UT) and time, both linear and quadratic, for the depression, experiential avoidance, anxiety sensitivity, and mindfulness variables. Patients treated with the UT showed more improvement in these variables on average, as well as more rebound between DC and 6MFU. Results from multilevel models examining eating disorder outcome showed no significant difference between the TAU and UT for the full sample, but a significant three-way interaction indicated that the UT produced more improvement in the EDE-Q relative to the TAU particularly for patients who entered treatment with high levels of experiential avoidance (BEAQ score). Conclusion: This long-term study of a transdiagnostic, evidence-based treatment in residential care for eating disorders and comorbidity suggests implementation was associated with beneficial effects on depression and emotion function outcomes, as well as eating disorder severity for patients with high levels of baseline emotion regulation problems. These effects did not appear to diminish in the 5 years following initial implementation.

Pilot data from the Self-Blame and Perspective-Taking Intervention for eating disorders

Eating disorders (EDs) are characterized by altered eating behaviors and valuation of self-image, as well as difficulty establishing supportive social relationships. This pilot study evaluated feasibility, acceptability, and clinical responses to a novel and brief group-therapy intervention for EDs, the Self-Blame and Perspective-Taking Intervention (SBPI). The SBPI consisted of four sessions of experiential art therapy activities in conjunction with psychoeducation targeting interpersonal attributions and mentalization. Twenty-four outpatient, treatment-seeking women with EDs participated in the SBPI, with 87.5% completing the intervention and 94% rating their participation positively. ED symptoms, depression, anxiety, self-attribution bias, and self-esteem were assessed before (T1) and after participation (N = 20 at T2; N = 18 at T3). Separate repeated measures MANOVAs were performed to assess these clinical and self-concept variables. Relative to baseline, participants demonstrated significant improvements in two all self-concept measures: self-attribution bias, trait self-esteem and state self-esteem at T2. ED, depression, and anxiety symptoms were significantly decreased at both T2 (1-4 weeks post) and T3 (3-5 months post). The SBPI altered self-concept targets acutely and led to sustained clinical improvements. Future work is needed to evaluate how self-concept and social constructs are related to clinical symptom expression in EDs.

The project COMPASS protocol: Optimizing mindfulness and acceptance-based behavioral treatment for binge-eating spectrum disorders

Outcomes from cognitive behavioral therapy for binge-eating spectrum disorders are suboptimal, possibly due in part to deficits in self-regulation (i.e., the ability to control behavior in pursuit of long-term goals despite internal challenges). Mindfulness and acceptance-based treatments (MABTs) integrate behavioral treatment with psychological strategies designed to enhance self-regulation, yet little is known about how and for whom they are effective. The present study will utilize the multiphase optimization strategy to identify which of four MABT components (mindful awareness, distress tolerance, emotion modulation, values-based decision making) to include in a fully powered clinical trial. Participants (n = 256) will be randomized to 16 sessions in one of 16 conditions, each a different combination of MABT components being included or excluded from a base behavioral treatment. Our primary aim is to evaluate each component's independent efficacy on disordered eating symptoms. Our secondary aims are to confirm each component's target engagement (i.e., whether each component improves the targeted variable and outcomes), and test that each component's efficacy is moderated by baseline weaknesses in the same component (e.g., that participants with poor distress tolerance at baseline benefit most from the distress tolerance component). Our exploratory aim is to quantify the component interaction effects.