The potential value of brief waitlist interventions in enhancing treatment retention and outcomes: a randomised controlled trial.

People with eating disorders are often placed on lengthy waitlists for treatment. This is problematic, as increased time spent on waitlists has been shown to predict dropout. We examined whether providing brief interventions to people on a waitlist improved retention or outcomes in treatment. Participants (N = 85) were referred to a university training clinic for 10-session cognitive behavioural therapy for non-underweight patients with eating disorders (CBT-T). While waitlisted for CBT-T, participants were randomised to one of two waitlist interventions or a control condition. In one waitlist intervention (CRT-Brief), participants received a cognitive remediation therapy session at the start of the waitlist period. In the other waitlist intervention (brief contact), participants were sent a short supportive email and psychoeducation halfway through the waitlist period. The control condition was waitlist as usual. There was no evidence to suggest that the waitlist interventions improved symptoms during the waitlist period or CBT-T. However, participants who received a waitlist intervention were three times more likely to complete treatment. The present study suggests that providing even brief contact while people are waitlisted for eating disorder treatment significantly improves retention. However, replication in a more adequately powered study is required.

A randomised controlled evaluation of an online perfectionism intervention for people with disordered eating - how perfect does it need to be?

Less help-seeking for an eating disorder is predicted by higher levels of denial of, and failure to perceive, illness severity. This research evaluates a "backdoor" approach to early intervention by investigating whether internet cognitive behaviour therapy for perfectionism can significantly improve disordered eating. Additionally, we investigated whether a more interactive intervention impacted outcomes. Participants were recruited worldwide online; 368 were screened, 172 (46.7%) met inclusion criteria (endorsed high shape, weight, or eating concerns) and randomised to an interactive (Focused Minds Program; FMP) or static PDF intervention (Centre for Clinical Intervention; CCI-P) or waitlisted (control condition). Participants completed assessments on disordered eating, perfectionism, and a range of secondary variables at the end of treatment, and 1- and 3-month follow-up. Intent-to-treat analyses indicated that, compared to control, FMP resulted in significantly lower levels of disordered eating at each assessment and CCI-P at the 1- and 3-month follow-up (respective 3-month follow-up between group effect sizes of 0.78 and 0.54). There were no significant differences between the two active interventions on any measure except depression and hated self. Results suggest an alternative approach to directly tackling disordered eating that is low-cost is effective, with a more interactive intervention producing a more rapid effect.Trials Registration: Australian New Zealand Clinical Trials Registry (ANZCTR) Trial Number: ACTRN12621001448831.

A meta-analysis of disordered eating and its association with self-criticism and self-compassion.

OBJECTIVE: Future treatments for eating disorders (ED) need to be enhanced by targeting maintaining mechanisms. Literature suggests self-criticism and self-critical perfectionism act as key mechanisms exacerbating ED, and self-compassion protects against self-criticism. This meta-analysis examines associations between self-criticism and self-critical perfectionism on disordered eating (DE), and reviews how self-compassion and self-criticism relate to each other with respect to DE. METHOD: Searches across three databases yielded 135 studies across 42,952 participants. Heterogeneity, publication bias, and quality assessments were analyzed. Moderation analyses between self-criticism measures, self-compassion measures, between clinical and nonclinical samples, and between cross-sectional and experimental studies were also conducted. RESULTS: Random-effects models showed a medium positive link between self-criticism and DE (r = .37), and 10 subgroups pertaining to various measures of self-criticism utilized in literature showed small to large positive links with DE (r = .20-.52). Preliminary evidence also suggests negative relationships between self-compassion and DE (r = -.40 to -.43) and negative relationships between self-compassion and self-criticism (r = -.04 to -.88). DISCUSSION: Greater levels of self-criticism is linked with greater levels of DE and reduced levels of self-compassion, suggesting a need to tackle self-criticism and nurture self-compassion in standard treatments for ED. Understanding these interactions better in conjunction with dismantling intervention studies can help develop more effective and efficient interventions targeting self-criticism and self-compassion for people with DE. PUBLIC SIGNIFICANCE STATEMENT: Higher levels of self-criticism are linked with higher levels of DE and lower self-compassion. Self-compassion interventions could be more effective and efficient in reducing ED symptoms if self-criticism is tackled early in such treatments.

OBJETIVO: Los futuros tratamientos para los trastornos de la conducta alimentaria (TCA) deben ser mejorados mediante la focalización en los mecanismos de mantenimiento. La literatura sugiere que la autocrítica y el perfeccionismo autocrítico actúan como mecanismos clave que exacerban los TCA, y que la autocompasión protege contra la autocrítica. Este meta-análisis examina las asociaciones entre la autocrítica y el perfeccionismo autocrítico en la alimentación disfuncional (AD), y revisa cómo la autocompasión y la autocrítica se relacionan entre sí con respecto a la AD. MÉTODO: Las búsquedas en tres bases de datos arrojaron 135 estudios con 42,952 participantes. Se analizaron la heterogeneidad, el sesgo de publicación y las evaluaciones de calidad. También se llevaron a cabo análisis de moderación entre las medidas de autocrítica, las medidas de autocompasión, entre muestras clínicas y no clínicas, y entre estudios transversales y experimentales. RESULTADOS: Los modelos de efectos aleatorios mostraron una asociación positiva media entre la autocrítica y la AD (r = .37), y 10 subgrupos relacionados con diversas medidas de autocrítica utilizadas en la literatura mostraron asociaciones positivas pequeñas a grandes con la AD (r = .20-.52). Además, evidencia preliminar sugiere relaciones negativas entre la autocompasión y la AD (r = −0.40-−0.43) y relaciones negativas entre la autocompasión y la autocrítica (r = −.04-−.88). DISCUSIÓN: Los niveles mayores de autocrítica están relacionados con mayores niveles de AD y niveles reducidos de autocompasión, lo que sugiere la necesidad de abordar la autocrítica y fomentar la autocompasión en los tratamientos estándar para los TCA. Comprender mejor estas interacciones en conjunto con estudios de intervención puede ayudar a desarrollar intervenciones más efectivas y eficientes dirigidas a la autocrítica y la autocompasión para personas con AD.

A pilot study of the perceptions and acceptability of guidance using artificial intelligence in internet cognitive behaviour therapy for perfectionism in young people.

Perfectionism is a transdiagnostic process associated with a range of psychological disorders. Cognitive Behaviour Therapy for Perfectionism (CBT-P) has been demonstrated as efficacious across guided and unguided internet delivered interventions in reducing perfectionism and psychopathology. The aim of this pilot study was to understand perceptions and acceptability of an artificial intelligence supplemented CBT-P intervention (AI-CBT-P) in young people with lived experience of anxiety and depression (n = 8; age range 19-29 years, M = 24 years, SD = 3.77; 50 % female, 38 % male, 12 % non-binary). Young people reported that they were frequent users of artificial intelligence for study, work and general information, were positive about the intervention and using artificial intelligence for guidance in a self-help intervention, but also noted several concerns. Young people perceived numerous benefits to AI-CBT-P, including ease of access, low cost, lack of stigma and benefits for individuals with social anxiety. Overall, young people appear to be interested in, and have a positive view of, AI-CBT-P. Further research is now required to examine the feasibility and acceptability of the intervention.

Addressing the gap of early intervention for eating disorders in primary health care.

AIM: Only one in four individuals with eating disorders (EDs) seek help, with many barriers to treatment-seeking present. Placing an early intervention model in primary mental health care settings is one approach to reducing these barriers. To date, only one model (emerge-ED) has been evaluated in the literature. METHODS: We aimed to replicate findings from the initial emerge-ED evaluation. We report on treatment outcomes in a new cohort and their views on barriers to treatment-seeking. We then examine how this early intervention model in primary health care has evolved to overcome the barriers to treatment delivery cited by health professionals in the initial evaluation. RESULTS: Eighty participants commenced treatment between July 2020 and March 2022 and completed a mean of 8.98 sessions, 70 (87.5%) completed >1 sessional measure on ED cognitions and behaviours, but only 31% (n = 24) completed lengthier assessments. Findings replicated initial emerge-ED outcomes, with small to moderate effect size decreases in the ED sessional measure at 70 days since treatment commencement for cognitions (d = .63) and ED behaviours (d = .09., .69). The most cited barrier by participants was "belief that my problem is not bad enough", reflective of denial of illness. Lastly, to overcome barriers to treatment delivery clinicians had to deviate from treatment protocols and work collaboratively with other healthcare providers. CONCLUSIONS: Our findings replicated the initial emerge-ED evaluation and highlight the importance of considering primary health care settings as an essential site in delivering early intervention services for EDs.

The role of readiness and confidence to change in the treatment of atypical anorexia nervosa and bulimia nervosa.

OBJECTIVE: Atypical anorexia nervosa (AN) is a serious eating disorder that is more common in the population than AN. Despite this, people with atypical AN are less likely to be referred or admitted for eating disorder treatment and there is evidence that they are less likely to complete or benefit from existing interventions. This study examined whether baseline readiness and/or confidence moderated outcomes from 10-session cognitive behavioral therapy among people with atypical AN and bulimia nervosa (BN), and whether the impact of these variables differed between diagnoses. METHODS: Participants (n = 67; 33 with atypical AN) were a subset from an outpatient treatment study. Linear mixed model analyses were conducted to examine whether baseline readiness and/or confidence moderated outcomes. RESULTS: People with BN who had higher levels of readiness or confidence at baseline had steeper decreases in eating disorder psychopathology over time. There was no evidence that readiness or confidence moderated outcomes for people with atypical AN. DISCUSSION: This study suggests that the moderators that have been identified for other eating disorders may not apply for people with atypical AN and highlights a need for future work to routinely investigate whether theoretically or empirically driven variables moderate outcomes in this little-understood population. PUBLIC SIGNIFICANCE STATEMENT: People with bulimia nervosa with higher readiness and confidence experienced greater decreases in eating disorder symptoms than people with lower readiness and confidence when treated with cognitive behavioral therapy. These findings did not apply to people with atypical anorexia nervosa. Results demonstrate that future work is urgently required to identify helpful treatments for people with atypical anorexia nervosa as well as the variables that have a positive impact on outcomes in treatment for these individuals.

Assessing clinician competence in the delivery of cognitive-behavioural therapy for eating disorders: development of the Cognitive-Behavioural Therapy Scale for Eating Disorders (CBTS-ED).

Evidence-based cognitive-behaviour therapy for eating disorders (CBT-ED) differs from other forms of CBT for psychological disorders, making existing generic CBT measures of therapist competence inadequate for evaluating CBT-ED. This study developed and piloted the reliability of a novel measure of therapist competence in this domain-the Cognitive Behaviour Therapy Scale for Eating Disorders (CBTS-ED). Initially, a team of CBT-ED experts developed a 26-item measure, with general (i.e. present in every session) and specific (context- or case-dependent) items. To determine statistical properties of the measure, nine CBT-ED experts and eight non-experts independently observed six role-played mock CBT-ED therapy sessions, rating the therapists' performance using the CBTS-ED. The inter-item consistency (Cronbach's alpha and McDonald's omega) and inter-rater reliability (ICC) were assessed, as appropriate to the clustering of the items. The CBTS-ED demonstrated good internal consistency and moderate/good inter-rater reliability for the general items, at least comparable to existing generic CBT scales in other domains. An updated version is proposed, where five of the 16 "specific" items are reallocated to the general group. These preliminary results suggest that the CBTS-ED can be used effectively across both expert and non-expert raters, though less experienced raters might benefit from additional training in its use.

A systematic review and meta-analysis of intensive treatment options for adults with eating disorders.

Eating disorders (EDs) are complex conditions with one of the highest mortality rates among psychiatric illnesses. While outpatient evidence-based treatments for EDs in adults exist, there is often utilisation of more intensive interventions as part of treatment. However, a comprehensive analysis of the impacts of intensive treatment (inpatient, residential and day program) on physical and psychosocial outcomes is lacking. Thus, the current systematic review and meta-analysis aimed to investigate the effectiveness of intensive treatments in adults with EDs for the outcomes of body mass index (BMI), disordered eating, depression, and quality of life, as well as a moderation analysis investigating a range of clinical characteristics. Overall, 62 studies were included in the meta-analysis. The results revealed that intensive treatment in adults yielded significant improvements in BMI (for underweight patients), disordered eating, depression, and quality of life. Treatment setting, length of stay and geographical region of the study all served as moderators for disordered eating and depression. Nevertheless, given the high heterogeneity in the meta- and moderation analyses, these results should be interpreted with caution. Future high-quality research is needed to determine the most beneficial elements of intensive treatment (compared to outpatient) in adults with EDs.

The development of co-designed parent-supported cognitive behaviour therapy for perfectionism in adolescents with eating disorders: initial feasibility and acceptability.

BACKGROUND: Perfectionism is significantly associated with symptoms of eating disorders in adolescents. Studies to date have not examined parent-supported CBT for perfectionism in eating disorders (CBT-P-ED). We co-designed the treatment and conducted a feasibility trial. METHODS: Eight parents of adolescents with eating disorders (M age = 48.75 years, 100% female) engaged in three co-design workshops to create a parent-supported CBT-P-ED self-help intervention. A further 10 parents (M age 41.8 years, 50% female) and their adolescent offspring (n = 10, M age 15.4 years, 60% female, 50% with self-reported diagnosis of anorexia nervosa) participated in a feasibility trial and provided feedback on the intervention. RESULTS: The parents who engaged in the co-design workshops suggested several areas to optimise the perfectionism intervention, including using plain language, the impact of parental perfectionism, how to engage with their adolescent in treatment and the importance of increasing eating disorder specific material. Feedback from the feasibility trial suggested that the intervention was acceptable and feasible with 100% of parents and adolescents saying it was useful, and no attrition. CONCLUSIONS: Parent-supported CBT-P-ED appears to be feasible. Future research is now required in a randomised controlled trial.

It has been repeatedly demonstrated that perfectionism can contribute to a variety of health issues. Perfectionism is a process centered on intense self-pressure to meet high standards, which has a significant impact on how an individual views themselves. Perfectionism is more prevalent in individuals with eating disorders than in those without it. There is a strong link between perfectionism and the onset of eating disorders, as well as an increase in disordered eating symptoms and a lower rate of recovery. There is currently no treatment available that addresses perfectionism in both parents and young people. The aim of the project was to work with parents and carers to co-design a parent-supported self-help program for young people that addresses perfectionism in eating disorders. We conducted three co-design workshops, followed by a four-week feasibility study to determine suitability and feedback on the intervention. The goal was to develop an intervention which can offer caregivers and young people easily available support that may aid in their understanding of perfectionism. It is hoped that by addressing perfectionism in young people with eating disorders, this approach will help them recover and thrive.

Developing a definition of body neutrality and strategies for an intervention.

The aim of this study was to provide a definition for body neutrality and understand the key strategies recommended to improve body neutrality for testing in future interventions. There is minimal academic literature on body neutrality and thus this study focused on examining websites where the concept has been discussed for some time. This was achieved using a realist synthesis of websites and a common elements approach to extract the key definition elements of body neutrality, strategies to improve body neutrality, in addition to the common critiques of both the body positivity and body neutrality movements. The initial search found 175 websites, of which 107 were included in the final synthesis, and common elements analysis followed after removal of duplicates and ineligible websites. Three elements, with several sub-elements, best operationalised the definition of body neutrality. Six strategies were found for development of a body neutrality intervention. This innovative study paves the way for rigorous evaluation of body neutrality. Recommendations for future work are provided, including the use of current measures, creating a new measure, and evaluating prevention and intervention programs including Single Session Interventions (SSIs).

A randomized controlled feasibility trial of metacognitive training with adolescents receiving treatment for anorexia nervosa.

OBJECTIVE: This pilot study investigated the feasibility and preliminary efficacy of the metacognitive training for eating disorders (MCT-ED) program in adolescents with anorexia nervosa (AN). We report attrition and subjective evaluation as well as changes to cognitive flexibility, perfectionism and eating disorder pathology relative to waitlist controls. METHOD: Female (n = 35, aged 13-17 years) outpatients with a diagnosis of AN (n = 20) or atypical AN (n = 15) completed baseline measures of cognitive flexibility, perfectionism, and eating disorder pathology (May 2020-May 2022). Participants were randomly allocated to either treatment-as-usual (TAU) plus MCT-ED or TAU waitlist condition. All participants completed post-intervention and 3-month follow-up questionnaires. RESULTS: The MCT-ED condition had a treatment attrition rate <15%. Participants provided positive evaluation of the program. There were large between groups differences favoring MCT-ED at post-intervention and 3-month follow-up for concern over mistakes perfectionism (respective ds = -1.25, 95% CI [-2.06, -.45]; -.83, 95% CI [-1.60, .06]) with a significant group difference post-intervention but not 3-month follow-up. DISCUSSION: Findings provide tentative support for the feasibility of MCT-ED as an adjunct intervention for young people with AN, however replication is needed with a larger sample size to further explore its efficacy. PUBLIC SIGNIFICANCE: Metacognitive training for eating disorders (MCT-ED) is a feasible adjunct intervention for adolescents with anorexia nervosa. The intervention, which targets thinking styles and is delivered online by a therapist, received positive feedback, had high treatment retention, and led to reductions in perfectionism by the end of treatment compared to wait-list controls. Although these gains were not sustained long-term, the program is suitable adjunct intervention for young people with eating disorders.

Developing a protocol to address co-occurring mental health conditions in the treatment of eating disorders.

OBJECTIVE: While co-occurring mental health conditions are the norm in eating disorders, no testable protocol addresses management of these in psychotherapy. METHOD: The literature on managing mental health conditions that co-occur with eating disorders is outlined and reviewed. RESULTS: In the absence of clear evidence to inform managing co-occurring mental health conditions, we advocate for use of an iterative, session-by-session measurement to guide practice and research. We identify three data-driven treatment approaches (focus solely on the eating disorder; multiple sequential interventions either before or after the eating disorder is addressed; integrated interventions), and the indications for their use. Where a co-occurring mental health condition/s impede effective treatment of the eating disorder, and an integrated intervention is required, we outline a four-step protocol for three broad intervention approaches (alternate, modular, transdiagnostic). A research program is suggested to test the usefulness of the protocol. DISCUSSION: Guidelines that provide a starting point to improving outcomes for people with eating disorders that can be evaluated/researched are offered in the current paper. These guidelines require further elaboration with reference to: (1) whether any difference in approach is required where the co-occurring mental health condition is a comorbid symptom or condition; (2) the place of biological treatments within these guidelines; (3) precise guidelines for selecting among the three broad intervention approaches when adapting care for co-occurring conditions; (4) optimal approaches to involving consumer input into identifying the most relevant co-occurring conditions; (5) detailed specification on how to determine which adjuncts to add. PUBLIC SIGNIFICANCE: Most people with an eating disorder also have another diagnosis or an underlying trait (e.g., perfectionism). Currently no clear guidelines exist to guide treatment in this situation, which often results in a drift away from evidence-based techniques. This paper outlines data-driven strategies for treating eating disorders and the accompanying comorbid conditions and a research program that can test the usefulness of the different approaches suggested.

Assessing the validity and responsiveness of a generic preference quality of life measure in the context of posttraumatic stress disorder.

PURPOSE: There is limited research exploring the usefulness of generic preference-based quality of life (GPQoL) measures used to facilitate economic evaluation in the context of posttraumatic stress disorder (PTSD). The aim of the current study was to explore the validity and responsiveness of a common GPQoL measure (Assessment of Quality of Life 8 Dimension [AQoL-8D]) in relation to a PTSD condition-specific outcome measure (Posttraumatic Stress Disorder Checklist for the DSM-5 [PCL-5]). METHOD: This aim was investigated in a sample of individuals (N = 147) who received trauma-focused cognitive-behavioural therapies for posttraumatic stress disorder. Convergent validity was investigated using spearman's correlations, and the level of agreement was investigated using Bland-Altman plots. Responsiveness was investigated by exploring the standardised response means (SRM) from pre-post-treatment across the two measures, which allow the comparison of the magnitude of change between the measures over time. RESULTS: Correlations between the AQoL-8D (dimensions, utility and summary total scores) and the PCL-5 total score ranged from small to large and agreement between the measures was considered moderate to good. While SRMs were large for the AQoL-8D and PCL-5 total scores, the SRM for the PCL-5 was nearly double that of the AQoL-8D. CONCLUSION: Our findings demonstrate that the AQoL-8D has good construct validity but present preliminary evidence that economic evaluations using only GPQoL measures may not fully capture the effectiveness of PTSD treatments.

Improving programme-led and focused interventions for eating disorders: An experts' consensus statement-A UK perspective.

OBJECTIVE: Eating disorders are associated with significant illness burden and costs, yet access to evidence-based care is limited. Greater use of programme-led and focused interventions that are less resource-intensive might be part of the solution to this demand-capacity mismatch. METHOD: In October 2022, a group of predominantly UK-based clinical and academic researchers, charity representatives and people with lived experience convened to consider ways to improve access to, and efficacy of, programme-led and focused interventions for eating disorders in an attempt to bridge the demand-capacity gap. RESULTS: Several key recommendations were made across areas of research, policy, and practice. Of particular importance is the view that programme-led and focused interventions are suitable for a range of different eating disorder presentations across all ages, providing medical and psychiatric risk are closely monitored. The terminology used for these interventions should be carefully considered, so as not to imply that the treatment is suboptimal. CONCLUSIONS: Programme-led and focused interventions are a viable option to close the demand-capacity gap for eating disorder treatment and are particularly needed for children and young people. Work is urgently needed across sectors to evaluate and implement such interventions as a clinical and research priority.

Interventions for perinatal borderline personality disorder and complex trauma: a systematic review.

Perinatal borderline personality disorder (BPD) and complex post-traumatic stress disorder (cPTSD) are associated with significant impairment to interpersonal functioning, and risk of intergenerational transmission of psychopathology. Evaluation of interventions, however, is scarce. To date, no systematic review has addressed interventions for perinatal BPD, cPTSD, and associated symptomatology. Given the modest evidence to support informed clinical guidelines, the objective of this systematic review is to synthesise the literature on interventions for perinatal BPD and cPTSD, and to generate future directions for research. A comprehensive literature search following PRISMA guidelines was conducted in PsycInfo, MEDLINE, Emcare, Scopus, and ProQuest Dissertations and Theses Global databases. Seven original studies were included, of which only two were randomised controlled trials, using less intensive comparison conditions. Results suggest an association between Dialectical Behavioural Therapy (DBT) group skills training, a multimodal therapeutic approach at a Mother-Baby Unit (MBU), and Child-Parent Psychotherapy with improved perinatal mental health outcomes and remission of symptoms. MBU admission and home-visiting programs were associated with healthy postpartum attachment relationships. Home-visiting programs and DBT group skills were additionally associated with improved maternal parenting capabilities. Conclusions to inform clinical guidelines are limited by a lack of credible comparison conditions, and low quantity and quality of evidence. The feasibility of implementing intensive interventions in real-world settings is dubious. Hence, it is suggested that future research considers utilising antenatal screening to identify at-risk mothers, and the implementation of early intervention, using robust designs that can inform robust conclusions.

Development of transdiagnostic clinical risk prediction models for 12-month onset and course of eating disorders among adolescents in the community.

OBJECTIVE: To develop and internally validate risk prediction models for adolescent onset and persistence of eating disorders. METHODS: N = 963 Australian adolescents (11-19 years) in the EveryBODY Study cohort completed online surveys in 2018 and 2019. Models were built to predict 12-month risk of (1) onset, and (2) persistence of a DSM-5 eating disorder. RESULTS: Onset Model. Of the n = 687 adolescents without an eating disorder at baseline, 16.9% were identified with an eating disorder after 12 months. The prediction model was based on evidence-based risk factors for eating disorder onset available within the dataset (sex, body mass index percentile, strict weight loss dieting, history of bullying, psychological distress, weight/shape concerns). This model showed fair discriminative performance (mean AUC = .75). The most important factors were psychological distress, weight and shape concerns, and female sex. Diagnostic Persistence Model. Of the n = 276 adolescents with an eating disorder at baseline, 74.6% were identified as continuing to meet criteria for an eating disorder after 12 months. The prediction model for diagnostic persistence was based on available evidence-based risk factors for eating disorder persistence (purging, distress, social impairment). This model showed poor discriminative performance (mean AUC = .65). The most important factors were psychological distress and self-induced vomiting for weight control. DISCUSSION: We found preliminary evidence for the utility of a parsimonious model for 12-month onset of an eating disorder among adolescents in the community. Future research should include additional evidence-based risk factors and validate models beyond the original sample. PUBLIC SIGNIFICANCE: This study demonstrated the feasibility of developing parsimonious and accurate models for the prediction of future onset of an eating disorder among adolescents. The most important predictors in this model included psychological distress and weight and shape concerns. This study has laid the ground work for future research to build and test more accurate prediction models in diverse samples, prior to translation into a clinical tool for use in real world settings to aid decisions about referral to early intervention.

Developing the "single-session mindset" in eating disorder research: Commentary on Schleider et al., 2023 "Realizing the untapped promise of single-session interventions for eating disorders".

Schleider and colleagues' paper on the application of single-session interventions (SSIs) to eating disorders is timely given the broader focus in mental health on flexible approaches to delivering support at the time the person needs it most. The eating disorder field needs to embrace these innovations including developing a "single-session mindset" with greater attention paid to testing the relevance of SSI for eating disorders. The use of well-powered trials of brief, focused and rapidly scalable interventions is an ideal vehicle for generation and evaluation of new and longer interventions. Our future research agenda needs to carefully consider our target audience, the primary outcome variable of most relevance, and the SSI topic that would be most likely to effect change. Research in prevention might focus on weight concern and evaluation of SSIs that focus on self-compassion or cognitive dissonance related to appearance ideals in the media. Work in early intervention could target denial and disordered eating using SSIs on growth mindset, behavioral activation, and imagery rescripting. Treatment waitlists provide another suitable opportunity, evaluating SSIs that aim to increase hope for change, treatment retention, and kick start early change in therapy, a robust predictor of better treatment outcome.

Impairments among DSM-5 eating disorders: A systematic review and multilevel meta-analysis.

Previous research revealed that people who did not meet full DSM-IV criteria for anorexia nervosa (AN), bulimia nervosa (BN), or binge-eating disorder (BED) but met criteria for eating disorder not otherwise specified (EDNOS) display high levels of psychiatric and physical morbidity commensurate with full criteria eating disorders. The DSM-5 introduced significant changes to eating disorder diagnostic criteria, so the present study aimed to determine whether the revised diagnostic criteria better distinguish between full criteria eating disorders, and other specified feeding or eating disorder (OSFED) and unspecified feeding or eating disorder (UFED). We present a series of meta-analyses comparing eating pathology, general psychopathology, and physical health impairments among those with AN, BN, and BED, compared to those with OSFED or UFED (n = 69 eligible studies). Results showed significantly more eating pathology in OSFED compared to AN, no difference in general psychopathology, and greater physical health impairments in AN. BN had greater eating pathology and general psychopathology than OSFED, but OSFED showed more physical health impairments. No differences were found between BN and purging disorder or low-frequency BN, or between BED and OSFED. Findings highlight the clinical severity of OSFED and suggest the DSM-5 criteria may not appropriately account for these presentations.