Confirmatory and exploratory factor analysis of the distress tolerance scale (DTS) in a clinical sample of eating disorder patients

The Factorial Structure, Psychometric Properties and Sensitivity to Change of the Distress Tolerance Scale for Children with Emotional Disorders

BACKGROUND

The Distress Tolerance Scale (DTS) was adapted for American and Chinese youth, but never for European youth. Moreover, the factor structures found in these previous studies were not consistent.

METHODS

The DTS was adapted for Portuguese children and then validated among 153 children aged 6-13 years with emotional disorders. A confirmatory factor analysis (CFA) was conducted; the DTS reliability and validity were analyzed, and sex and age differences were explored. A sub-sample of children who received a transdiagnostic CBT (Unified Protocol for Children) was used to analyze the DTS's sensitivity to therapeutic change.

RESULTS

The five tested models (based on previous studies) exhibited adequate fit in the CFA. However, the model previously reported for use in American children with emotional disorders was selected as the most appropriate. The DTS demonstrated adequate psychometric properties, and its validity was established through significant negative associations with measures of anxiety, depression and negative affect, as well as positive associations with positive affect. Age and sex differences were discussed. The DTS scores significantly increased from pre- to post-treatment, demonstrating sensitivity to therapeutic change.

CONCLUSIONS

The DTS is a suitable and useful measure for assessing children's distress tolerance and to assess the efficacy of CBT.

Acceptance and commitment therapy for episodic migraine: Rationale and design of a pilot randomized controlled trial

Migraine is a debilitating disorder with limited pharmacological options. Many migraine medications can have intolerable side effects leading patients to seek complementary and integrative health (CIM) approaches for treatment. One option that is growing in popularity and evidence is Acceptance and Commitment Therapy (ACT), a mindfulness-based therapy. The purpose of this paper is to describe how ACT may be an effective modality integrated into the treatment of migraine and to describe the design of a pilot study of ACT for migraine. First, we review the research and the promise of mindfulness therapies for the treatment of migraine. Then, we describe how ACT differs from other mindfulness therapies for migraine and why it can be a promising option for these patients. Finally, we summarize the design of a pilot study designed to determine the feasibility of performing a future fully powered study to determine the effectiveness of ACT on migraine frequency and disability. This pilot study includes unique features, including a remotely-delivered ACT intervention and the measurement of cortisol levels before and after the intervention.

Distress tolerance across substance use, eating, and borderline personality disorders: A meta-analysis

BACKGROUND

Distress tolerance (DT) has received increased attention in recent years due to its purported role in dysregulated behaviours and their clinical manifestations, such as problematic substance use (PSU), disordered eating behaviours (e.g., binge-eating and purging; DEB), and borderline personality disorder (BPD) symptomatology. Despite the proposed transdiagnostic utility of DT across PSU, DEB, and BPD, there has yet to be a systematic and comprehensive examination characterising and comparing its association with this class of impulsive-type psychopathology.

METHODS

A systematic search was conducted across five electronic databases using search terms designed to capture extant literature on the association between DT and PSU, DEB, and BPD symptomatology. A series of meta-analyses were undertaken on correlation coefficients from 81 studies to examine the association between DT and each psychopathology domain, as well as impulsive-type psychopathology overall. Moderator analyses were conducted to examine whether these relationships were moderated by DT measurement type, sample type, age, and gender.

RESULTS

DT shared significant, negative, medium correlations with PSU (r = -.18,), DEB (r = -.20), and BPD symptomatology (r = -.27). The magnitude of these associations was not significantly different across the three psychopathology domains, supporting transdiagnostic conceptualisation. DT measurement type, age, and sample type moderated several of these indicated relationships.

LIMITATIONS

The majority of studies were conducted in adult samples from Western countries, limiting understanding of these relationships across development and different cultures.

CONCLUSIONS

The present findings support the putative transdiagnostic role of DT across PSU, DEB, and BPD, which may ultimately inform novel, cross-cutting interventions.

The Role of Emotion Regulation in Eating Disorders: A Network Meta-Analysis Approach

Background

Previous theoretical models and reviews have documented a strong connection between emotion dysregulation eating disorder (ED) psychopathology among the general and clinical populations. The aim of this review was to build on this previous work by conducting a network meta-analysis to explore associations between adaptive and maladaptive emotion regulation strategies and ED psychopathology trans-diagnostically across the ED spectrum to identify areas of emotion dysregulation that have the strongest association with symptomatology.

Methodology

A total of 104 studies were included in the meta-analysis and correlation coefficient representing the associations between specific emotion regulation strategies and ED symptomatology were extracted. We ran a Bayesian random effects network meta-analysis and the initial network was well-connected with each emotion regulation strategy being linked to at least one other strategy. We also conducted a network meta-regression to explore whether between-study differences in body mass index (BMI), age, and whether the sample consisted of solely female participants explained any possible network inconsistency.

Results

The network meta-analysis revealed that ruminations and non-acceptance of emotions were most closely associated with ED psychopathology. There was no significant network inconsistency but two comparisons approached significance and thus meta-regressions were conducted. The meta-regressions revealed a significant effect of BMI such that the associations between different emotion regulation strategies and ED symptomatology were weaker among those with low BMI.

Discussion

The present findings build on previous work and highlight the role of rumination and difficulties with accepting emotions as key emotion regulation difficulties in EDs. Additionally, the finding that the associations were weaker among ED patients with low BMI may point toward a complex relationship between ED behaviors and emotion regulation. Taken together, our findings call for interventions that target emotion regulation, specifically rumination and difficulties accepting emotions, in the treatment of EDs.

Systematic Review Registration

https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021249996, PROSPERO, identifier: CRD42021249996.

Emotion regulation across eating pathology: A meta-analysis

The goal of this meta-analysis was to examine the associations between specific emotion regulation abilities (emotional awareness, emotional clarity) and strategies (acceptance of emotions, reappraisal, problem-solving, rumination, avoidance of emotions, and suppression), and eating pathology. A total of 96 studies and 239 effect sizes were included in the analysis. Relations between global and specific emotion regulation abilities and strategies and eating disorders and eating-related symptoms were examined. Results indicated medium-to-large effect sizes for the associations between adaptive emotion regulation and eating disorder and eating-related symptoms, and medium-to-large effect sizes for the associations between maladaptive emotion regulation and eating disorders and eating-related symptoms. In terms of specific emotion regulation strategies, large magnitude of associations were identified for the relations between lack of emotional awareness, clarity, acceptance, reappraisal, problem-solving, and eating disorders. Rumination, avoidance of emotions, and suppression also showed large associations with anorexia nervosa and bulimia nervosa. Overall, emotion regulation did not differ across eating disorders, a finding supporting the transdiagnostic character of emotion regulation problems in eating pathology. These findings have important theoretical and practical implications for prevention and intervention programs.

Testing an Integrative Model of Affect Regulation and Avoidance in Non-Suicidal Self-Injury and Disordered Eating

This research tested a model that integrates risk factors among non-suicidal self-injury (NSSI) and eating disorder (ED) behaviors with the aim of elucidating possible shared and unique mechanisms underlying both behaviors. Emotional distress, limited access to emotion regulation (ER) strategies, experiential avoidance, and NSSI/ED frequency were examined in a sample of 230 female undergraduates. Structural equation modeling indicated that limited access to ER strategies and avoidance mediated relationship between emotional distress and avoidance, which in turn was associated with NSSI and ED behaviors. Results suggest NSSI and ED behaviors may serve similar emotion regulation functions, and specifically highlight the role of experiential avoidance in these behaviors.

Validation of post-traumatic stress disorder (PTSD) and complex PTSD using the International Trauma Questionnaire

OBJECTIVE

The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire (ITQ) the current study will (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using disorder-specific measures.

METHOD

ICD-11 and DSM-5 PTSD-specific measures were completed by a British clinical sample of trauma-exposed patients (N = 171). The structure and validity of ICD-11 PTSD and CPTSD were assessed by means of factor analysis and assessing relationships with criterion variables.

RESULTS

Diagnostic rates under ICD-11 were significantly lower than those under DSM-5. A two-factor second-order model reflecting the distinction between PTSD and CPTSD best represented the data from the ITQ; and the PTSD and CPTSD factors differentially predicted multiple psychological variables.

CONCLUSION

The factorial and discriminant validity of ICD-11 PTSD and CPTSD was supported, and ICD-11 produces fewer diagnostic cases than DSM-5.

Dimensions of emotion dysregulation in anorexia nervosa and bulimia nervosa: A conceptual review of the empirical literature

Several existing conceptual models and psychological interventions address or emphasize the role of emotion dysregulation in eating disorders. The current article uses Gratz and Roemer's (2004) multidimensional model of emotion regulation and dysregulation as a clinically relevant framework to review the extant literature on emotion dysregulation in anorexia nervosa (AN) and bulimia nervosa (BN). Specifically, the dimensions reviewed include: (1) the flexible use of adaptive and situationally appropriate strategies to modulate the duration and/or intensity of emotional responses, (2) the ability to successfully inhibit impulsive behavior and maintain goal-directed behavior in the context of emotional distress, (3) awareness, clarity, and acceptance of emotional states, and (4) the willingness to experience emotional distress in the pursuit of meaningful activities. The current review suggests that both AN and BN are characterized by broad emotion regulation deficits, with difficulties in emotion regulation across the four dimensions found to characterize both AN and BN, although a small number of more specific difficulties may distinguish the two disorders. The review concludes with a discussion of the clinical implications of the findings, as well as a summary of limitations of the existing empirical literature and suggestions for future research.

Emotion generation and regulation in anorexia nervosa: a systematic review and meta-analysis of self-report data

This systematic review sought to examine the generation and regulation of emotion in people with Anorexia Nervosa (AN). Key databases (Medline, Embase, PsychINFO and Web of Science) were searched for peer-reviewed articles published by March 2015 yielding 131 studies relevant to emotion generation and emotion regulation (ER) processes as defined by Gross (1998). Meta-analyses determined pooled group differences between AN and healthy control (HC) groups. More maladaptive schemata were reported by people with AN than HCs, with largest pooled effects for defectiveness/shame (d=2.81), subjugation (d=1.59) and social isolation (d=1.66). Poorer awareness of and clarity over emotion generated and some elevated emotionality (disgust and shame) were reported. A greater use of 'maladaptive' ER strategies was reported by people with AN than HCs, alongside less use of 'adaptive' strategies. Pooled differences of particularly large effect were observed for: experiential avoidance (d=1.00), negative problem-solving style (d=1.06), external/social comparison (d=1.25), submissiveness (d=1.16), attention concentration (worry/rumination; d=1.44) and emotion suppression (d=1.15), particularly to avoid conflict (d=1.54). These data support the notion that emotion regulation difficulties are a factor in AN and support use of associated cognitive-affective models. The implications of these findings for further understanding AN, and developing models and related psychological interventions are discussed.

Evaluation of a new measure of mood intolerance, the Tolerance of Mood States Scale (TOMS): psychometric properties and associations with eating disorder symptoms

OBJECTIVE

This research aimed to (i) validate a new measure of mood intolerance, the Tolerance of Mood States (TOMS) scale, and (ii) to examine associations between TOMS scores and eating pathology.

METHODS

The original TOMS was developed and evaluated using the data from 258 adult participants. The measure consisted of two separate scales, initially with a total of 64 items, with this reduced to 34 items through exploratory factor analyses. The 34-item TOMS was administered to a new sample of adult participants recruited from a university setting (N=227), along with the Distress Tolerance Scale (DTS-C; Corstorphine, Mountford, Tomlinson, Waller, & Meyer, 2007) and other measures of psychological distress and eating disorder symptoms. The reliability and validity of the 34-item TOMS scales were examined through confirmatory factor analysis, inspection of alpha coefficients, and inspection of correlations between TOMS scores and those on other relevant measures. Associations between TOMS scores and eating disorder symptoms were considered using continuous and categorical analyses.

RESULTS

Analyses provided support for the reliability and validity of the scale two of the TOMS. This scale consists of 11 items on two subscales, and assesses the tendency to engage in maladaptive behaviours when confronted with intense moods. Scores on this scale were significantly higher amongst participants who reported binge eating and purging than amongst participants who did not, and they correlated significantly with a global index of eating disorder symptoms. The 11-item scale was retained as the final version of the TOMS.

CONCLUSIONS

Preliminary support is provided for the validity of a new measure of mood intolerance, the TOMS. Scores on the TOMS subscales were significantly associated with eating disorder symptoms in this non-clinical sample.

Motivation-focused treatment for eating disorders: a sequential trial of enhanced cognitive behaviour therapy with and without preceding motivation-focused therapy

OBJECTIVE

To evaluate the effectiveness of a motivation-focused intervention prior to individual cognitive behavioural eating disorder treatment.

METHOD

Enhanced cognitive-behavioural therapy (CBT-E) in its usual form was compared with CBT-E preceded by four sessions of motivation-focused therapy (MFT) (MFT + CBT-E). Participants were adult outpatients seen at a specialist eating disorder clinic in Western Australia, who met criteria for a Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition eating disorder. A sequential trial of CBT-E as usual (n = 43) and MFT + CBT-E (n = 52) was conducted over a 40-month period.

RESULTS

The MFT phase was associated with significant increases in readiness to change. There were no significant between-group differences in treatment completion rates, and treatment completers in both conditions reported comparable reductions in eating disorder symptoms over time.

CONCLUSION

In this sample, MFT + CBT-E was not associated with superior treatment outcome when compared with CBT-E as usual.

Avoidance of affect in the eating disorders

The Distress Tolerance Scale (DTS) (Corstorphine, Mountford, Tomlinson, Waller, & Meyer, 2007) measures the tendency to use cognitive and behavioural strategies to manage the experience of positive and negative affect. This paper aimed to explore the factor structure of the DTS, particularly in relation to avoidance of affect. Participants were 227 female university students (non-clinical sample) and 257 clients seeking treatment for an eating disorder (clinical sample). Confirmatory factor analysis was used to test two previously proposed factor structures of the DTS in the non-clinical sample. Both of these models were found to be a poor fit to the data. Subsequently, nine items measuring avoidance of affect were analysed using exploratory factor analysis in the non-clinical sample. Three factors of avoidance of affect were identified (Behavioural Avoidance of Positive Affect, Behavioural Avoidance of Negative Affect, and Cognitive Avoidance of Affect). Confirmatory factor analysis supported this avoidance of affect model in the clinical sample. Significant correlations were observed between avoidance of affect subscales and eating psychopathology in both samples. Results suggest that the avoidance of positive emotion may be an important factor in eating disorders. It is recommended that future studies broaden their investigation of the role of emotion in eating disorders to include both negative and positive emotion.