The classification of bulimic eating disorders: a community-based cluster analysis study

Published online by Cambridge University Press 09 Jul 2009There is controversy over how best to classify eating disorders in which there is recurrent binge eating. Many patients with recurrent binge eating do not meet diagnostic criteria for either of the two established eating disorders, anorexia nervosa or bulimia nervosa. The present study was designed to derive an empirically based, and clinically meaningful, diagnostic scheme by identifying subgroups from among those with recurrent binge eating, testing the validity of these subgroups and comparing their predictive validity with that of the DSM-IV scheme. A general population sample of 250 young women with recurrent binge eating was recruited using a two-stage design. Four subgroups among the sample were identified using a Ward's cluster analysis. The first subgroup had either objective or subjective bulimic episodes and vomiting or laxative misuse; the second had objective bulimic episodes and low levels of vomiting or laxative misuse; the third had subjective bulimic episodes and low levels of vomiting or laxative misuse; and the fourth was heterogeneous in character. This cluster solution was robust to replication. It had good descriptive and predictive validity and partial construct validity. The results support the concept of bulimia nervosa and its division into purging and non-purging subtypes. They also suggest a possible new binge eating syndrome. Binge eating disorder, listed as an example of Eating Disorder Not Otherwise Specified within DSM-IV, did not emerge from the cluster analysis.P. J. Hay, C. G. Fairburn and H. A. Dol

Interprovincial differences in the rates of minor crimes of violence and related disorders in New Zealand 1853-1930: part 2

Der vorliegende Beitrag diskutiert einige methodologische Probleme, die sich in der historischen Sozialforschung durch den Vergleich allgemeiner sozialer Variablen über zwei oder mehr Gebiete ergeben. Die Autoren beschreiben, welche statistischen Modelle und Verfahren hier zur Verfügung stehen. Vor- und Nachteile der einzelnen Verfahren werden gegeneinander abgewogen. Anhand der Daten zu einem früheren Beitrag in der HSR (Haslett/Fairburn,1990,Bd.1) zur Kleinkriminalität in 9 Destrikten Neuseelands demonstrieren die Autoren die Möglichkeiten der Faktorenanalyse hinsichtlich der Ausgangsfragestellung. (pmb)'The problem of comparing historical data with common variables from two or more distinct locations remains an open question in historical studies. The issues of formulating suitable historical models and comparing them, using appropriate statistical models and techniques, are the topics of this paper. These matters are first discussed in general and a number of possible techniques outlined in concept. The advantages and disadvantages of each are summarised. The question of distinguishing between differences of structure and differences of degree, in the presence of measurement error, is then considered in greater detail with reference to factor analysis and the New Zealand provincial data base, 1853-1930.' (author's abstract

Interprovincial differences in the rates of minor crimes of violence and related disorders in New Zealand, 1853-1930: part 1

Zwischen 1853 und 1930 wurde Neuseeland rapide durch hauptsächlich aus Großbritannien stammende Einwanderer kolonialisiert. Gegen Ende der 1870er Jahre sank die Rate der Kleinkriminalität (Tätlichkeiten, Trunkenheitsdelikte, Alkoholmißbrauch) dramatisch. Der vorliegende Beitrag geht der Frage nach, ob die Ursachen dieser 'Ordnungswidrigkeiten' für alle 9 Distrikte Neuseelands die gleichen sind. Durch eine Faktorenanalyse und ein Modell von 22 Variablen kann die Autorin für jede Provinz je eine spezifische kausale Struktur herausarbeiten. Trotz dieser Differenzen läßt sich jedoch für die 'Kolonie' ein spezifisch britischer einheitlicher Lebensstil identifizieren. (pmb)'Between 1853 and 1930 New Zealand was rapidly colonised by white settlers most of whom were British immigrants. From about the late 1870s their per capita rates of minor assaults drunkenness convictions, spirits consumption, and civil suits fell dramatically. The paper asks whether the causal structure underlying these 'disorders' was the same in every one of New Zealand's nine provincial districts. Even though New Zealand was comparatively homogenous in ethnic and cultural terms, the character of its provincial districts varied substantially in respect to other criteria such as policing, population size, level of economic development, urbanization, industrialization and so forth. To determine if the same explanatory model fits each of the nine provinces, the paper systematically applies two forms of factor analysis to a matrix of twenty two variables in each province. The paper finds that every province had a causal structure which differed in kind from that operating in the other provinces. However, these differences were not fundamental in type.' (author's abstract

The Reliability and Validity of the Clinical Perfectionism Questionnaire in Eating Disorder and Community Samples

Background: Clinical perfectionism is a risk and maintaining factor for anxiety disorders, depression and eating disorders. Aims: The aim was to examine the psychometric properties of the 12-item Clinical Perfectionism Questionnaire (CPQ). Method: The research involved two samples. Study 1 comprised a nonclinical sample (n = 206) recruited via the internet. Study 2 comprised individuals in treatment for an eating disorder (n = 129) and a community sample (n = 80). Results: Study 1 factor analysis results indicated a two-factor structure. The CPQ had strong correlations with measures of perfectionism and psychopathology, acceptable internal consistency, and discriminative and incremental validity. The results of Study 2 suggested the same two-factor structure, acceptable internal consistency, and construct validity, with the CPQ discriminating between the eating disorder and control groups. Readability was assessed as a US grade 4 reading level (student age range 9–10 years). Conclusions: The findings provide evidence for the reliability and validity of the CPQ in a clinical eating disorder and two separate community samples. Although further research is required the CPQ has promising evidence as a reliable and valid measure of clinical perfectionism

A Community-Based Study of Enduring Eating Features in Young Women

We conducted a prospective exploration of the temporal course of eating disorder (ED) symptoms in two cohorts of community women. One hundred and twenty-two young women (Cohort 1) identified in a general population based survey with ED symptoms of clinical severity agreed to participate in a 5-year follow-up study. A comparative sample (Cohort 2) of 706 similar aged self-selected college women (221 with disordered eating) was recruited one year later. Both ED groups were given a health literacy package in the first year. ED symptoms, health related quality of life, and psychological distress were assessed annually with the Eating Disorder Examination Questionnaire, the Short Form—12 Health Survey and the Kessler Psychological Distress Scale, respectively. Forty percent (Cohort 1) and 30.3% (Cohort 2) completed questionnaires at each year of follow-up. In both groups, there was early improvement in ED symptoms which plateaued after the first year, and participants retained high EDE-Q scores at 5 years. BMI increased as expected. Mental health related quality of life scores did not change but there were small improvements in psychological distress scores. The findings suggest little likelihood of spontaneous remission of ED problems in community women

Testing the cognitive-behavioural maintenance models across DSM-5 bulimic-type eating disorder diagnostic groups: A multi-centre study

The original cognitive-behavioural (CB) model of bulimia nervosa, which provided the basis for the widely used CB therapy, proposed that specific dysfunctional cognitions and behaviours maintain the disorder. However, amongst treatment completers, only 40–50 % have a full and lasting response. The enhanced CB model (CB-E), upon which the enhanced version of the CB treatment was based, extended the original approach by including four additional maintenance factors. This study evaluated and compared both CB models in a large clinical treatment seeking sample (N = 679), applying both DSM-IV and DSM-5 criteria for bulimic-type eating disorders. Application of the DSM-5 criteria reduced the number of cases of DSM-IV bulimic-type eating disorders not otherwise specified to 29.6 %. Structural equation modelling analysis indicated that (a) although both models provided a good fit to the data, the CB-E model accounted for a greater proportion of variance in eating-disordered behaviours than the original one, (b) interpersonal problems, clinical perfectionism and low self-esteem were indirectly associated with dietary restraint through over-evaluation of shape and weight, (c) interpersonal problems and mood intolerance were directly linked to binge eating, whereas restraint only indirectly affected binge eating through mood intolerance, suggesting that factors other than restraint may play a more critical role in the maintenance of binge eating. In terms of strength of the associations, differences across DSM-5 bulimic-type eating disorder diagnostic groups were not observed. The results are discussed with reference to theory and research, including neurobiological findings and recent hypotheses

Group therapy for binge eating in Type 2 diabetes: A randomized trial

Aims: This preliminary study addresses three related issues. First, there is a need to test the effectiveness of cognitive behavioural therapy (CBT) for binge eating in populations with Type 2 diabetes. Second, the impact of a treatment for binge eating on diabetes management is unknown. Finally, whilst a number of treatment modalities have been shown to improve binge eating, there has not been a comparison between CBT and a non-specific therapy for binge eating. Methods: Group CBT for binge eating was compared with a group nonprescriptive therapy (NPT), a therapy for which there is no theoretical or empirical support in eating disorders, in a randomized trial which included a post-treatment assessment and a 3-month follow-up. Results: There were no differences between CBT and NPT at post-treatment, with both treatments being associated with significant changes in binge eating, mood and body mass index. However, there was a significant relapse in binge eating at the 3-month follow-up in the NPT condition. This was in contrast to the CBT condition, where treatment gains were maintained. Finally, across treatments, reduction in binge eating from pre- to post-treatment was associated with reduction in HbA. Conclusions: Binge eating in Type 2 diabetes is responsive to psychosocial treatment, and reduction in binge eating appears to improve glycaemic control. However, this is a small study with a short follow-up period. Future studies will need to extend the follow-up period to assess for long-term maintenance of the effects of CBT on binge eating and diabetic control in this population

BEfree: A new psychological program for binge eating that integrates psychoeducation, mindfulness, and compassion

Background Binge eating disorder (BED) is associated with several psychological and medical problems, such as obesity. Approximately 30% of individuals seeking weight loss treatments present binge eating symptomatology. Moreover, current treatments for BED lack efficacy at follow‐up assessments. Developing mindfulness and self‐compassion seem to be beneficial in treating BED, although there is still room for improvement, which may include integrating these different but complimentary approaches. BEfree is the first program integrating psychoeducation‐, mindfulness‐, and compassion‐based components for treating women with binge eating and obesity. Objective To test the acceptability and efficacy up to 6‐month postintervention of a psychological program based on psychoeducation, mindfulness, and self‐compassion for obese or overweight women with BED. Design A controlled longitudinal design was followed in order to compare results between BEfree (n = 19) and waiting list group (WL; n = 17) from preintervention to postintervention. Results from BEfree were compared from preintervention to 3‐ and 6‐month follow‐up. Results BEfree was effective in eliminating BED; in diminishing eating psychopathology, depression, shame and self‐criticism, body‐image psychological inflexibility, and body‐image cognitive fusion; and in improving obesity‐related quality of life and self‐compassion when compared to a WL control group. Results were maintained at 3‐ and 6‐month follow‐up. Finally, participants rated BEfree helpful for dealing with impulses and negative internal experiences. Conclusions These results seem to suggest the efficacy of BEfree and the benefit of integrating different components such as psychoeducation, mindfulness, and self‐compassion when treating BED in obese or overweight women. Key Practitioner Message The current study provides evidence of the acceptability of a psychoeducation, mindfulness, and compassion program for binge eating in obesity (BEfree); Developing mindfulness and self‐compassionate skills is an effective way of diminishing binge eating, eating psychopathology and depression, and increasing quality of life in women with obesity; Integrating psychoeducation, mindfulness, and compassion seem to be effective in diminishing binge eating, with results maintained up to 6‐month postintervention

Disordered eating behaviours in Women with Type 2 diabetes mellitus

The aim of the article is to investigate the relationship between disordered eating, particularly binge eating, and Type 2 diabetes in women. Subjects included 215 women with Type 2 diabetes (mean age: 58.9 years, mean body mass index (BMI)=33.5 kg/m2). Measurements included a structured clinical interview for disordered eating (Eating Disorder Examination, EDE), self-report measures of psychological functioning, glycosylated haemoglobin A1c, BMI. A total of 20.9% of women was binge eating regularly. Binge eating was associated with poorer well being, earlier age of diagnosis, poorer self-efficacy for diet and exercise self-management, and higher BMI. Binge eating frequency predicted blood glucose control after controlling for BMI and exercise level. A history of binge eating independently predicted age of diagnosis of diabetes. Binge eating is relatively common in women with Type 2 diabetes. The relationship between binge eating severity and diabetic control is not explained by overweight. Binge eating may be an independent risk factor for Type 2 diabetes