Moderators of weight gain in the early stages of outpatient cognitive behavioral therapy for adults with anorexia nervosa

Examining anxious temperament in anorexia nervosa: Behavioural inhibition and intolerance of uncertainty and their contribution to trait anxiety in adolescents with anorexia nervosa

BACKGROUND

Anorexia nervosa (AN) is a serious and complex psychiatric disorder yet treatment results are suboptimal. Insight into the etiology of this illness is much needed. Research highlights the implication of anxiety-related traits in the development and maintenance of AN. This study investigates firstly, behavioural inhibition and intolerance for uncertainty (IU) in adolescents with and without AN, and secondly relations between these traits.

METHODS

In a cross-sectional study, 165 adolescent girls (AN = 94, HC = 71) completed questionnaires measuring behavioural inhibition, IU and trait anxiety. ANOVAs tested differences between AN and HC groups, and mediation models with IU as a mediator between behavioural inhibition and trait anxiety were run.

RESULTS

AN adolescents reported significantly higher levels of behavioural inhibition, IU and trait anxiety compared to their peers. In both AN and HC, a direct and a total effect of behavioural inhibition on trait anxiety was found. However, only in the AN group IU partially mediated the relation between behavioural inhibition and trait anxiety.

LIMITATIONS

Data is cross-sectional and longitudinal studies are required. A mean illness duration of nearly 2 years may mean early effects of malnourishment and habituation and future studies should include patients with shorter illness duration.

CONCLUSIONS

Results highlight that behavioural inhibition and IU may contribute to anxiety in AN whilst their peers may have developed better executive and social-emotional skills to manage uncertainty. Adolescents with AN may benefit from interventions targeting behavioural inhibition and IU.

The impact of personality disorders and personality traits on psychotherapy treatment outcome of eating disorders: A systematic review

A significant proportion of those with eating disorders (EDs) do not respond to first-line treatments. This systematic review was conducted to identify whether personality disorders (PDs)/traits predict or moderate ED treatment outcomes and whether these outcomes were differentially influenced by ED or PD diagnostic subtypes, or treatment approach. A comprehensive systematic literature search was conducted using the PRISMA guidelines. A total of seven randomised controlled trials (RCTs) plus four follow-up studies were reviewed investigating the impact of PD and PD traits on treatment outcomes for EDs. The majority indicated that PD had some impact on treatment outcomes. Outcome measures and time-point measurements varied across studies. Included studies suggested that bulimia nervosa treatment outcomes were not hindered by co-morbidity of borderline PD; however, psychiatric impairment remained high at post-treatment and follow-up. Cluster C PDs were found to negatively impact treatment outcomes for binge ED and attrition rates for anorexia nervosa. Included studies suggested that interventions that addressed aspects of personality pathology showed greater main effects for ED treatment outcomes. There is an urgent need for future RCTs on ED treatments to include routine measures of core personality features to allow their impacts to be more thoroughly examined and for psychotherapies to be tailored accordingly.

Network intervention analysis to assess the trajectory of change and treatment effects associated with the use of online guided self-help for anorexia nervosa

AIM

The aim of this study was to use the innovative technique of Network Intervention Analysis (NIA) to examine the trajectory of symptom change associated with the use of a digital guided self-help intervention (RecoveryMANTRA) to augment treatment as usual in adult anorexia nervosa.

METHODS

Self-reported eating disorder symptoms and mood (stress, anxiety and depression), work and social adjustment, motivation and treatment (Treatment as usual + RecoveryMANTRAand Treatment as usual) were included as nodes in the network and examined using NIA. Networks were computed at baseline (n = 88, 99), at end of treatment (6 weeks, n = 71, 75) and at 6- (n = 58, 63) and 12-month (n = 52, 63) follow-up.

RESULTS

RecoveryMANTRA was associated with a direct effect on anxiety, shape concern and restraint at the end of the intervention. This effect was not maintained at follow-up. There were no direct effects of RecoveryMANTRA on motivation, stress and depression.

CONCLUSIONS

These findings indicate that RecoveryMANTRA exerts a direct effect on eating disorder symptoms and anxiety. NIA is a promising method to evaluate trajectories of clinical change and direct and indirect effects of a therapeutic intervention compared to a control condition.

Comorbid depression as a negative predictor of weight gain during treatment of anorexia nervosa: A systematic scoping review

BACKGROUND

Anorexia nervosa (AN) is a serious mental illness with high rates of relapse and mortality. Psychiatric comorbidities are common but their impact on the prognosis is largely unknown.

OBJECTIVE

The aim was to investigate the influence of psychiatric comorbidity on weight gain during treatment of AN.

METHODS

A systematic search was performed in PubMed/MEDLINE, EMBASE and PsycINFO. Studies evaluating psychiatric comorbidity as a predictor for treatment outcome (weight gain) were included, however, comorbid alcohol/drug addiction was excluded from this review.

RESULTS

Four thousand five hundred and twenty six publications were identified from which 15 were included. The majority of the included studies had a prospective open naturalistic study design, a short-term follow-up period, and were based on small populations of primarily adolescent and adult women. Four studies indicate depression, and two obsessiveness as negative prognostic factors, whilst one study indicated moderate depression and yet another, neuroticism, as positive predictors for weight gain.

DISCUSSION

The systematic scoping review found a large number of publications whereof only a few directly described the influence of psychiatric comorbidity on weight gain in AN. Overall, studies were heterogeneous in design, purpose and outcome making comparisons difficult. Findings were divergent but depression had a negative influence on weight gain in four studies.

Developing more efficient, effective, and disseminable treatments for eating disorders: an overview of the multiphase optimization strategy

The present manuscript describes the multiphase optimization strategy (MOST) and its potential applications to treatments for eating disorders (EDs). The manuscript describes the three phases of MOST, discusses a hypothetical case example of how MOST could be applied to developing a disseminable ED treatment, and reviews the pros and cons of the MOST approach. Outcomes from treatments for EDs leave room for improvement. However, traditional methods of treatment development and evaluation (i.e., the treatment package approach) make it challenging to determine how best to improve ED treatments. For example, testing full treatment packages in open trials and RCTs without systematic testing of each component is inefficient (as it is unknown which components are effective), and often does not provide concrete future directions for optimization of the treatment. Much stands to be gained by optimizing treatments in the early stages before testing them in open trials or RCTs. MOST is an alternative, engineering-inspired research framework that is well-suited to address the issues of inefficiency associated with the treatment package approach. MOST entails identifying the most promising treatment components for inclusion in interventions, then eliminating or deemphasizing less efficacious/inert components. This strategy results in a treatment comprised of only effective components that can then be tested via RCT. Though the MOST approach has limitations, it has the potential to greatly benefit ED treatment research and is worthy of application in the field.

Pre-treatment patient characteristics as predictors of drop-out and treatment outcome in individual and family therapy for adolescents and adults with anorexia nervosa: A systematic review and meta-analysis

Understanding variables predicting drop-out or unfavourable outcome following treatment for anorexia nervosa (AN) may help to improve upon intervention efforts. However, the current literature has demonstrated sparse and inconsistent significant findings. The current systematic review and meta-analysis summarised the evidence base examining baseline predictors of drop-out and outcome in AN treatment. A literature search was conducted to identify research investigating predictors of drop-out and outcome in individuals treated for AN. Four online databases were searched, and predictors were organised by category and dependent variable (outcome versus drop-out). 27 studies were included. Lower motivation, lower BMI, and having the binge-purge subtype of AN predicted drop-out. Greater ED pathology and poorer motivation predicted poorer outcome. Clinical recommendations include taking particular care during assessment stages to identify patients at risk of drop-out and/or poor outcome based on their clinical profile and level of motivation for recovery. At-risk patients should be receiving tailored treatment to enhance engagement and reduce risk of drop-out. In conclusion, there's some evidence that motivation, BMI, subtype, and ED pathology predicts drop-out and/or outcome in individual and family-based therapy for AN amongst adolescents and adults; however, research incorporating carefully designed multi-site studies is required to further examine these findings.

Rapid response to eating disorder treatment: A systematic review and meta-analysis

OBJECTIVE

This review aimed to (a) examine the effects of rapid response on behavioral, cognitive, and weight-gain outcomes across the eating disorders, (b) determine whether diagnosis, treatment modality, the type of rapid response (changes in disordered eating cognitions or behaviors), or the type of behavioral outcome moderated this effect, and (c) identify factors that predict a rapid response.

METHOD

Thirty-four articles met inclusion criteria from six databases. End of treatment and follow-up outcomes were divided into three categories: Behavioral (binge eating/purging), cognitive (EDE global scores), and weight gain. Average weighted effect sizes(r) were calculated.

RESULTS

Rapid response strongly predicted better end of treatment and follow-up cognitive and behavioral outcomes. Moderator analyses showed that the effect size for rapid response on behavioral outcomes was larger when studies included both binge eating and purging (as opposed to just binge eating) as a behavioral outcome. Diagnosis, treatment modality, and the type of rapid response experienced did not moderate the relationship between early response and outcome. The evidence for weight gain was mixed. None of the baseline variables analyzed (eating disorder psychopathology, demographics, BMI, and depression scores) predicted a rapid response.

DISCUSSION

As there is a solid evidence base supporting the prognostic importance of rapid response, the focus should shift toward identifying the within-treatment mechanisms that predict a rapid response so that the effectiveness of eating disorder treatment can be improved. There is a need for future research to use theories of eating disorders as a guide to assess within-treatment predictors of rapid response. © 2016 Wiley Periodicals, Inc. Int J Eat Disord 2016; 49:905-919.

Predictors of Positive Treatment Outcome in People With Anorexia Nervosa Treated in a Specialized Inpatient Unit: The Role of Early Response to Treatment

OBJECTIVE

To investigate factors which predict positive treatment outcome in inpatients with anorexia nervosa (AN), particularly the role of early treatment response.

METHOD

102 patients entering specialist inpatient treatment were assessed for eating disorder history, psychopathology, and motivation to change. Predictive factors assessed were: early treatment response defined as weight increase of at least 0.5-1 kg/week during the first 6 weeks of treatment (n=87), admission body mass index (BMI), onset age, chronicity, motivation to change, diagnosis, and previous hospitalization for AN. Positive treatment outcome was defined as achieving a BMI of 17.5 kg/m(2) within an individual time frame.

RESULTS

Logistic regression indicated that patients were 18 times more likely to reach positive treatment outcome if they met the National Institute for Health and Care Excellence weight guidelines within the first 6 weeks of hospitalization. Higher admission BMI was also found to predict positive treatment outcome.

DISCUSSION

Higher entry BMI and early weight gain predict positive treatment outcome in individuals receiving specialist AN inpatient treatment. Copyright © 2016 John Wiley & Sons, Ltd and Eating Disorders Association.

Can Interoception Improve the Pragmatic Search for Biomarkers in Psychiatry?

Disrupted interoception is a prominent feature of the diagnostic classification of several psychiatric disorders. However, progress in understanding the interoceptive basis of these disorders has been incremental, and the application of interoception in clinical treatment is currently limited to panic disorder. To examine the degree to which the scientific community has recognized interoception as a construct of interest, we identified and individually screened all articles published in the English language on interoception and associated root terms in Pubmed, Psychinfo, and ISI Web of Knowledge. This search revealed that interoception is a multifaceted process that is being increasingly studied within the fields of psychiatry, psychology, neuroscience, and biomedical science. To illustrate the multifaceted nature of interoception, we provide a focused review of one of the most commonly studied interoceptive channels, the cardiovascular system, and give a detailed comparison of the most popular methods used to study cardiac interoception. We subsequently review evidence of interoceptive dysfunction in panic disorder, depression, somatic symptom disorders, anorexia nervosa, and bulimia nervosa. For each disorder, we suggest how interoceptive predictions constructed by the brain may erroneously bias individuals to express key symptoms and behaviors, and outline questions that are suitable for the development of neuroscience-based mental health interventions. We conclude that interoception represents a viable avenue for clinical and translational research in psychiatry, with a well-established conceptual framework, a neural basis, measurable biomarkers, interdisciplinary appeal, and transdiagnostic targets for understanding and improving mental health outcomes.

A preliminary investigation of a novel training to target cognitive biases towards negative social stimuli in Anorexia Nervosa

BACKGROUND

Patients with Anorexia Nervosa (AN) experience high levels of social difficulties and anxiety. These problems might be underpinned by negatively biased processing of social stimuli. The aim of this study was to examine the feasibility of using a novel Cognitive Bias Modification (CBM) training to target information processing biases in patients with AN.

METHODS

Twenty-eight patients with AN completed a baseline and end of intervention assessment of mood and social appraisals. The CBM training consisted of 5 sessions and included an attentional probe task to train attention towards positive social stimuli and an ambiguous scenarios task to train benign or neutral interpretations of ambiguous social scenarios.

RESULTS

At baseline patients displayed an attention and interpretation bias towards negative social stimuli. At the end of intervention there was a medium sized increase in attention to positive faces and fewer negative interpretations of ambiguous social stimuli. There were also lower levels of anxiety and higher levels of self-compassion in response to a judgemental video clip.

LIMITATIONS

The lack of a control group is the main limitation to this preliminary study as the changes obtained may have resulted from non-specific aspects of the inpatient treatment.

CONCLUSIONS

A novel CBM training is associated with more positive processing of social information in AN. It would be of interest to test the hypothesis that reducing cognitive biases towards social stimuli impacts on wider features of an eating disorder.

Clinician and practice characteristics influencing delivery and outcomes of the early part of outpatient cognitive behavioural therapy for anorexia nervosa

Cognitive-behavioural therapy (CBT) can be effective for anorexia nervosa. However, there is evidence that the delivery of treatments for the eating disorders is inconsistent. This study examined evidence that clinician characteristics and practice can influence the effective implementation of CBT. The participants were 100 qualified clinicians who routinely offered outpatient CBT to adults with anorexia nervosa. They completed a survey of their demographic characteristics, level of anxiety, clinical practice in CBT for anorexia nervosa, and beliefs about the relationship between weight gain and therapeutic alliance in the early part of such treatment. Greater reported levels of weight gain were associated with the use of manuals, early focus on weight gain as a target, structured eating, and a belief that weight gain precedes a good working alliance. Clinician anxiety and early focus on the therapeutic alliance rather than structured eating were associated with poorer outcomes. These conclusions need to be tested within clinical and research settings. However, they suggest that clinicians should be encouraged to use manual-based approaches when treating anorexia nervosa using CBT, as focusing on techniques might result in the best possible outcome in this early part of treatment.

Clinical characteristics associated with premature termination from outpatient psychotherapy for anorexia nervosa

AIM

The literature on clinical characteristics associated with premature termination of treatment (PTT) is beset with conflicting and non-replicated findings. This study explores clinical characteristics potentially associated with PTT in a randomised controlled outpatient psychotherapy trial for anorexia nervosa (AN).

METHODS

Participants were 56 women aged 17-40 years with spectrum AN. The completer group (n = 35) included those completing at least 15/20 planned sessions with the remainder of the sample comprising the PTT group (n = 21). Variables examined included demographic factors, psychosocial functioning, psychiatric history, lifetime comorbidity, temperament and eating disorder characteristics. Logistic regression was used to examine significant variables. A Kaplan-Meier survival curve was used to illustrate time taken to PTT.

RESULTS

The mean number of sessions in the PTT group was 8.1. Lower self-transcendence scores on the Temperament and Character Inventory were associated with PTT.

CONCLUSIONS

Recognising and addressing personality factors have the potential to enhance retention in treatment.

Therapeutic alliance and weight gain during cognitive behavioural therapy for anorexia nervosa

This study examined the relationship between therapeutic alliance and primary symptom change (weight gain) during CBT for anorexia nervosa. The aims were threefold: (1) to establish the strength of the therapeutic alliance across the treatment, (2) to determine whether early therapeutic alliance is associated with the completion of CBT for this client group, and (3) to determine the direction of the relationship between therapeutic alliance and weight gain. Adult outpatients (N=65) with a diagnosis of anorexia nervosa (or atypical anorexia nervosa) completed a measure of alliance at session six and at the end of treatment. Weight was recorded at the start of treatment, session six and at the end of treatment. The strength of the alliance was consistently high in the sample. However, early therapeutic alliance was not associated with either the likelihood of completing treatment or subsequent weight gain. In contrast, both early and later weight gain were associated with the strength of subsequent alliance. These findings indicate that it might be advisable to focus on techniques to drive weight gain rather than rely on the therapeutic alliance to bring about therapeutic change.

Early improvement in eating attitudes during cognitive behavioural therapy for eating disorders: the impact of personality disorder cognitions

BACKGROUND

The personality disorders are commonly comorbid with the eating disorders. Personality disorder pathology is often suggested to impair the treatment of axis 1 disorders, including the eating disorders.

AIMS

This study examined whether personality disorder cognitions reduce the impact of cognitive behavioural therapy (CBT) for eating disorders, in terms of treatment dropout and change in eating disorder attitudes in the early stages of treatment.

METHOD

Participants were individuals with a diagnosed eating disorder, presenting for individual outpatient CBT. They completed measures of personality disorder cognitions and eating disorder attitudes at sessions one and six of CBT. Drop-out rates prior to session six were recorded.

RESULTS

CBT had a relatively rapid onset of action, with a significant reduction in eating disorder attitudes over the first six sessions. Eating disorder attitudes were most strongly associated with cognitions related to anxiety-based personality disorders (avoidant, obsessive-compulsive and dependent). Individuals who dropped out of treatment prematurely had significantly higher levels of dependent personality disorder cognitions than those who remained in treatment. For those who remained in treatment, higher levels of avoidant, histrionic and borderline personality disorder cognitions were associated with a greater change in global eating disorder attitudes.

CONCLUSIONS

CBT's action and retention of patients might be improved by consideration of such personality disorder cognitions when formulating and treating the eating disorders.

Nonspecific predictors of weight gain in the early stages of outpatient cognitive behavioral therapy for adults with anorexia nervosa: Replication and extension

OBJECTIVE

This study extends previous work, examining psychological factors that influence the level of weight gain across the first 20 sessions of cognitive behavioral therapy (CBT) for anorexia nervosa.

METHOD

Thirty-two patients with anorexia nervosa (mean body mass index (BMI) = 16.0; SD = 1.11) completed measures of eating attitudes and comorbid axis 1 pathology at the outset of CBT, and their weight gain was measured at the 6th and 20th sessions of the therapy.

RESULTS

Unhealthy eating attitudes at the start of therapy were associated with slower weight gain across the first 20 sessions of CBT. In contrast, higher levels of pretreatment axis 1 pathology were associated with slower weight gain only after the 6th session. The axis 1 features that moderated weight gain over 20 sessions of CBT were broader than those that had previously been shown to predict weight gain over the first 10 CBT sessions.

DISCUSSION

During CBT for anorexia nervosa, weight gain might be enhanced by addressing a range of aspects of axis 1 pathology (e.g., depression, hostility, and features of anxiety). However, the approach is likely to be less important at first than directly addressing eating pathology and overvalued ideas about eating, shape, and weight.