Intermittent explosive disorder and eating disorders: Analysis of national comorbidity and research samples

ObjectiveClinical studies suggest comorbidity between eating disorders and aggressive behaviors. This study examined the pattern of comorbidity between intermittent explosive disorder (IED) and eating disorders (ED).MethodsData were analyzed from both the adult and adolescent samples of the National Comorbidity Survey-Replication (n = 19,430) and a clinical research sample (n = 1,642).ResultsLifetime prevalence of Any ED was elevated in IED vs. non-IED for both the community and clinical research samples. Though anorexia nervosa displayed no relationship with IED in either sample, bulimia nervosa was associated with IED in the community sample and binge eating disorder was associated with IED in both the community and clinical research samples. Onset of IED preceded onset of Any ED in at least 70% of comorbid IED/ED cases in both community and clinical research samples. Associations of IED with Any ED and bulimia nervosa in the community sample, and associations of IED with binge eating disorder in the clinical research sample, remained significant after controlling for other psychiatric disorders.ConclusionsIndividuals with IED are more likely to report lifetime prevalence of ED, particularly bulimic spectrum disorders. This finding, and the observation that the onset of IED occurs prior to the onset of ED in the majority of individuals, suggests that longitudinal studies are needed to clarify this relationship and determine whether IED is a risk factor for the development of ED. Early identification of individuals with IED or impulsive aggression may provide clinically useful information to determine most effective treatment interventions.     

Emotion dysregulation across the spectrum of pathological eating: Comparisons among women with binge eating,overeating, and loss of control eating

ABSTRACT

Emotion regulation difficulties influence the etiology and maintenance of binge eating and eating disorders, but differential associations between emotion dysregulation and objective binge eating (OBE) components have not been examined. We compared emotion dysregulation dimensions in women with OBEs (n = 27), overeating only (n = 25), loss of control (LOC) only (n = 32), or no pathological eating (n = 137). Women with OBEs had significantly more difficulty with overall emotion dysregulation, access to strategies, and impulse control when upset than other groups. Women with OBEs and women with overeating did not differ on poor emotional clarity, whereas women with OBEs and women with LOC did not differ on non-acceptance of emotions. The combination of overeating and LOC eating is associated with the greatest emotion dysregulation, but certain emotion regulation facets may differentially relate to overeating and LOC. Identifying emotion-related treatment targets for core eating disorder symptoms is important.     

Emotional eating in anorexia nervosa and bulimia nervosa

ObjectivesThe relationship between emotional states and eating behaviors is complex, and emotional eating has been identified as a possible factor triggering binge eating in bulimia nervosa (BN) and binge eating disorder. Few studies considered emotional eating in patients with anorexia nervosa.MethodsThe present study evaluated the clinical correlates of emotional eating in 251 eating-disordered (EDs) subjects (70 AN restricting type, 71 AN binge eating/purging type, 110 BN purging type) and in a group of 89 healthy control subjects. Subjects were assessed by means of a clinical interview (Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition) and several self-reported questionnaires, including the Emotional Eating Scale (EES).ResultsNo significant differences were found between the 3 EDs groups in terms of EES total score, and all patients with ED showed higher EES scores compared with control subjects. Emotional eating was associated with subjective binge eating in AN binge eating/purging type and with objective binge eating in patients with BN. Among patients with AN restricting type, emotional eating was associated with restraint, but this association was lost when controlling for fear of loss of control over eating, which was the principal determinant of restraint.ConclusionEmotional eating and fear of loss of control over eating are significantly associated with specific eating attitudes and behaviors, according to the different diagnoses. Emotional eating is a relevant psychopathologic dimension that deserves a careful investigation in both anorectic and bulimic patients.     

Ethnicity,eating pathology,drive for muscularity,and muscle dysmorphia in college men: a descriptive study

ABSTRACT

The nature and presentation of eating pathology in ethnically diverse men are not well defined. This study examined associations among ethnicity, body image, and eating pathology in nonclinical college men (N = 343). Analysis of variance analyses indicated that markers of eating, weight, and shape concerns differed by ethnicity: Asian and Hispanic/Latino men reported more pathological levels than European and African American men. Hierarchical multiple regression analyses indicated that ethnicity moderated the relationship between drive for muscularity and body checking, which was strongest for Asian men. Results increase awareness of how ethnicity interacts with body image and eating pathology, which underscores the need for individualized, culturally sensitive treatment for ethnically diverse men.     

Validation of the French Version of the Yale Food Addiction Scale: An Examination of Its Factor Structure,Reliability, and Construct Validity in a Nonclinical Sample

Objective:

The concept of food addiction has recently been proposed by applying the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision, criteria for substance dependence to eating behaviour. Food addiction has received increased attention given that it may play a role in binge eating, eating disorders, and the recent increase in obesity prevalence. Currently, there is no psychometrically sound tool for assessing food addiction in French. Our study aimed to test the psychometric properties of a French version of the Yale Food Addiction Scale (YFAS) by establishing its factor structure and construct validity in a nonclinical population.

Method:

A total of 553 participants were assessed for food addiction (French version of the YFAS) and binge eating behaviour (Bulimic Investigatory Test Edinburgh and Binge Eating Scale). We tested the scale’s factor structure (factor analysis for dichotomous data based on tetrachoric correlation coefficients), internal consistency, and construct validity with measures of binge eating.

Results:

Our results supported a 1-factor structure, which accounted for 54.1% of the variance. This tool had adequate reliability and high construct validity with measures of binge eating in this population, both in its diagnosis and symptom count version. A 2-factor structure explained an additional 9.1% of the variance, and could differentiate between patients with high, compared with low, levels of insight regarding addiction symptoms.

Conclusions:

In our study, we validated a psychometrically sound French version of the YFAS, both in its symptom count and diagnostic version. Future studies should validate this tool in clinical samples.     

Latent structure of eating disorder symptoms: a factor analytic and taxometric investigation

OBJECTIVE: The latent structure of eating disorder symptoms, as defined by DSM-IV, was tested in a group of 341 women with and without an eating disorder diagnosis. METHOD: The study group consisted of 201 participants with a diagnosis of anorexia nervosa, bulimia nervosa, binge eating disorder, or eating disorder not otherwise specified; 24 comparison subjects who were obese but did not have an eating disorder diagnosis; and 116 normal-weight comparison subjects. The presence and severity of DSM-IV eating disorder symptoms was assessed with the semi-structured Interview for the Diagnosis of Eating Disorders-IV. The study group was randomly divided into two subgroups for factor analytic studies, and the data were subjected to exploratory and confirmatory factor analysis. Pilot taxometric analyses were used to examine whether the obtained factors represented true dimensions or latent discrete classes. RESULTS: In exploratory factor analyses with data from subgroup 1, three factors were found to account for 66% of the variance in eating disorder symptoms: binge eating, fear of fatness/compensatory behaviors, and drive for extreme thinness. Confirmatory factor analysis cross-validated this factor structure with data from subgroup 2. The eating disorder groups and comparison groups were found to differ on at least one of the three factors. The results of the taxometric analyses were inconsistent with a strictly dimensional model of eating disorders and suggested that some features may be dimensional whereas others may be taxonic (discrete). DISCUSSION: The eating disorders, as defined by DSM-IV, can be conceptualized as having three latent features. Taxometric tests found empirical support for conceptualizing bulimia nervosa and binge eating disorder as discrete syndromes.     

Profiling disordered eating patterns and body mass index (BMI) in the English general population

Purpose

Little national evidence exists on disordered eating patterns in the UK. This study examined the prevalence and nature of disordered eating patterns in the National Adult Psychiatric Morbidity Survey 2007.

Method

Responses to the screening tool for eating disorders (SCOFF) and body mass index (BMI) were analysed using latent class analysis (n = 7,001). Multinomial logistic regression explored the associations between latent classes and mental health comorbidities.

Results

The prevalence of possible eating disorders in England using the SCOFF was 6.3 %; this decreased to 1.6 % when accounting for the negative impact feelings about food had on the respondent’s life. Five latent classes were identified: classes 1 and 2 resembled known eating disorders (‘marginal anorexia’ relating to anorexia nervosa and ‘binge eaters’ relating to bulimia nervosa/binge eating disorder); class 3 consisted of people who were obese, but did not experience eating problems; class 4 was morbidly obese, with an elevated risk of anxiety disorders; class 5 was labelled as ‘normal eaters’, with a low probability of eating problems and a normal BMI.

Conclusions

Adults assigned to eating disorder type classes are at increased risk for mental health comorbidities and poorer social functioning. Information presented herein on clustering of disordered eating patterns may help clinicians identify those men and women risk for an eating disorder.     

Associations between negative affect and binge/purge behaviors in women with anorexia nervosa: Considering the role of negative urgency

ObjectiveEvidence implicates negative affect in the occurrence of binge/purge behaviors, although the extent to which theoretically relevant individual difference variables may impact this association remains unclear. Negative urgency, the dispositional tendency to engage in rash action when experiencing negative affect, is a unique facet of impulsivity that may play a key role. Moreover, it was hypothesized that women with anorexia nervosa (AN) who are higher on measures of negative urgency, relative to those lower on negative urgency, would exhibit: 1) greater binge eating and purging frequencies on high negative affect days, and 2) a greater change in negative affect prior to and following binge eating and purging episodes.MethodWomen with AN (n = 82) completed a self-report measure of negative urgency and a 2-week ecological momentary assessment protocol in which they recorded binge eating, purging, and negative affect ratings.ResultsWomen with higher levels of negative urgency exhibited a greater frequency of binge eating and purging; however, in comparison to women low on negative urgency, they: 1) were more likely to binge eat on days corresponding with low-to-moderate negative affect (similar rates of binge eating were observed on high negative affect days), and 2) displayed substantially elevated levels of negative affect across time, and thus, smaller degrees of change in negative affect prior to and following binge eating and purging episodes.DiscussionNegative urgency underlies individual differences in the daily experience of negative affect. Women with AN who are high on negative urgency may have an increased propensity for binge eating and purging via a relatively persistent and heightened state of negative emotions.     

Feminist identity,body image,and disordered eating

ABSTRACT

Using data from a community-based sample (Project EAT-III), this study (N = 1241; mean age = 25.2) examined the relationship of feminist identity with body image and disordered eating. Feminist-identified women reported significantly higher body satisfaction than non-feminist women and women who did not identify as feminists but held feminist beliefs. However, feminist-identified women did not differ from non-feminist women in disordered eating. Women holding feminist beliefs and non-feminist women did not differ in body satisfaction. Our findings suggest that self-identification as a feminist may promote positive body image in young adult women, but may be insufficient to change behaviors.     

Influence of attention-deficit/hyperactivity disorder on binge eating behaviors and psychiatric comorbidity profile of obese women

Objective

Previous studies have reported higher prevalence rates of attention-deficit/hyperactivity disorder (ADHD) both in eating disorders (ED) and in obese patients. We compared the psychiatric comorbidity profile of obese ADHD women with non-ADHD obese women and how ADHD symptoms impact in binge eating behaviors.

Design

Cross-sectional study of a clinical sample.

Subjects

171 adult women were evaluated at a specialized clinic in obesity and ED.

Measurements

Participants complete a semi-structured interview and psychopathology rating scales. A hierarchical regression model was employed to predict binge eating behavior.

Results

Obese ADHD patients had a larger number of psychiatric comorbidities (p < 0.001), especially Substance Abuse Disorders, and higher scores on psychopathology rating scales (p < 0.05). The highest prediction for binge eating in the regression model was the presence of depressive symptoms, followed by ADHD inattention symptoms and trait-impulsivity.

Conclusion

ADHD should be routinely evaluated in obese since it is related with more severe psychopathology. Depressive symptoms can predict the presence of binge eating in obese patients.     

Latent class analysis of eating and impulsive behavioral symptoms in Taiwanese women with bulimia nervosa

ObjectiveThe implications of impulsivity in its relationship with binge-eating or purging behaviors remain unclear. This study examined the patterns of eating behaviors and co-morbid impulsive behaviors in individuals with bulimia nervosa n optimally homogeneous classes using latent class analysis (LCA).MethodsAll participants (n=180) were asked to complete a series of self-reported inventories of impulsive behaviors and other psychological measures. Information regarding the lifetime presence of symptoms of eating disorder was assessed by clinical interviews. LCA was conducted using eating disorder symptoms, impulsive behaviors, and the number of purging methods.ResultsThree latent classes of bulimic women were identified. These were women who exhibited relatively higher rates of purging, symptoms of impulsive behavior, and multiple purging methods (17.8%), women who used no more than one purging method with a low occurrence of impulsive behavior (41.7%), and women who showed higher rates of purging behaviors and the use of multiple purging methods with a low rate of impulsive behavior (41.7%). The impulsive sub-group had comparable severity of eating-related measures, frequency of binge-eating, and higher levels of general psychopathology than that of the other two sub-groups.ConclusionThis study provides empirical support for the existence of an impulsive subgroup with distinctive features among a non-Western group of BN patients. This study also suggests that mechanisms other than impulse dysregulation may exist for the development of binge-eating and purging behaviors in bulimia nervosa patients, or the mechanisms contributing to binge-eating and impulsive behaviors may be different.     

Binge eating and menstrual dysfunction

Objective

The relation between eating disorders and menstrual function has been widely studied, but it is unknown whether the behavior of binge eating itself is related to menstrual dysfunction.

Methods

The 11,503 women included in this study were from the Swedish Twin study of Adults: Genes and Environment. The associations between menstrual dysfunction and binge eating were analyzed using logistic regression or multiple linear regression models with generalized estimation equations.

Results

Women who reported lifetime binge eating were more likely to report either amenorrhea or oligomenorrhea than women who reported no binge eating. These results persisted when controlling for compensatory behaviors including self-induced vomiting, laxative use, and diuretic use. No differences between women with and without a history of binge eating were observed for age at menarche.

Conclusion

Even when controlling for the effect of compensatory behaviors, the behavior of binge eating is associated with menstrual dysfunction. Metabolic and endocrinological factors could underlie this association. Careful evaluation of menstrual status is warranted for women with all eating disorders, not just anorexia nervosa.     

Social anxiety and self-consciousness in binge eating disorder: associations with eating disorder psychopathology

ObjectiveResearch has consistently shown that anxiety disorders are common among individuals with eating disorders. Although social phobia has been found to be highly associated with eating disorders, less is known about social anxiety in individuals with binge eating disorder (BED). The present study examined associations between social anxiety and self-consciousness with body mass index (BMI) and eating disorder psychopathology in BED.MethodsParticipants were 113 overweight or obese treatment-seeking men and women with BED. Participants were administered semistructural diagnostic clinical interviews and completed a battery of self-report measures.ResultsSocial anxiety was positively and significantly correlated with shape and weight concerns and binge eating frequency. After accounting for depressive levels, social anxiety and self-consciousness accounted for significant variance in eating, shape, and weight concerns and overall eating disorder global severity scores (Eating Disorder Examination). Social anxiety also accounted for significant variance in binge eating frequency after covarying for depressive levels. Social anxiety and self-consciousness were not significantly associated with BMI or dietary restraint.DiscussionOur findings suggest that greater social anxiety and heightened self-consciousness are associated with greater eating disorder psychopathology, most notably with greater shape and weight concerns and binge eating frequency in patients with BED. Social anxiety and self-consciousness do not appear to be merely functions of excess weight, and future research should examine whether they contribute to the maintenance of binge eating and associated eating disorder psychopathology.     

A two-stage epidemiologic study on prevalence of eating disorders in female university students in Wuhan,China

Background

The community prevalence of eating disorders among Chinese young women may now be similar to their western counterparts.

Aim

To investigate the prevalence of eating disorders (ED) in female university students in Wuhan, China, using a two-stage design.

Method

In stage one, 99.1 % (N = 8,444) of eligible students (N = 8,521) completed the eating disorder inventory-1 (EDI-1) and a survey of relevant anthropomorphic data. A total of 421 women scored above the cut-off for EDE-1, as defined by a set of criteria similar to those of Keski-Rahkonen (Int J Eat Disord 39:754–762, 2006). 257 (61 %) of these case-positive women and a random sample of case-negative women (312 out of 8,023, 4 %) whose scores did not exceed the defined cut-off were interviewed using the eating disorder examination (EDE) and the structured clinical interview for DSM-IV axis I disorders (SCID-I).

Results

On interview with the SCID-I, 79 women were diagnosed with an ED. Among them, 10 had anorexia nervosa (AN), 21 bulimia nervosa (BN), and 48 binge eating disorder (BED) The results showed a prevalence rate of 1.05 % (95 % CI = 0.02–2.08) for AN, 2.98 % (95 % CI = 1.21–4.74) for BN, and 3.53 % (95 % CI = 1.75–5.30) for BED.

Conclusion

The prevalence of ED among female university students in China is now similar to that of their western counterparts, and BED is the most common ED followed by BN and AN similarly.     

Trauma,PTSD, and binge and hazardous drinking among women and men: Findings from a national study

ObjectiveTo examine whether trauma and posttraumatic stress disorder (PTSD) are differentially associated with binge and hazardous patterns of drinking among women and men.MethodsSecondary analysis of the Wave 2 National Epidemiologic Survey on Alcohol and Related Conditions (NESARC); the analytic sample included 31,487 respondents (54.6% female) without past-year alcohol abuse/dependence. Participants' trauma-exposure/PTSD status was characterized as: no exposure to trauma in lifetime (reference), lifetime trauma exposure, PTSD before past-year, or past-year PTSD. Past-year binge and hazardous drinking were examined with multinomial logistic regression models (past-year abstinence was modeled as the non-event); models included the main effects of trauma-exposure/PTSD status and gender, the trauma-exposure/PTSD status-by-gender interaction, psychiatric comorbidity, and socio-demographic covariates.ResultsThe gender-specific effects of trauma, before past-year PTSD, and past-year PTSD were significantly elevated for all drinking behaviors in women (range of odds ratios (ORs) = 1.8–4.8), and for some drinking behaviors in men (range of ORs = 1.3–2.0), relative to no trauma exposure. Trauma exposure was more strongly associated with high-frequency binge drinking, low-frequency binge drinking, and non-binge drinking among women as compared to men. Past-year PTSD was also more strongly associated with low-frequency binge drinking and non-binge drinking among women compared to men. Findings for hazardous drinking followed a similar pattern, with significant gender-related differences in ORs for hazardous drinking and non-hazardous drinking observed with respect to trauma exposure and past-year PTSD..ConclusionMental health practitioners should be mindful of the extent to which trauma-exposed individuals both with and without PTSD engage in binge and hazardous drinking, given the negative consequences associated with these patterns of drinking..     

The importance of distinguishing between the different eating disorders (sub)types when assessing emotion regulation strategies

People with eating disorders (ED) have difficulties regulating their emotions adaptively. Little is known about differences and similarities between different types of ED and how these regulation difficulties relate to other emotional problems. The present study examines maladaptive (suppression) and adaptive (cognitive reappraisal) emotion regulation strategies in women with different ED and relationships with anxiety and depression levels. In 32 women with AN restrictive subtype (ANR), 32 with AN binge-purge subtype (ANBP), 30 with bulimia nervosa (BN), 29 with binge eating disorder (BED), and 64 healthy women, the ERQ (emotion regulation) as well as STAI-T (anxiety), BDI-SF (depression), and EDDS (eating pathology) were administered. Women across different ED subtypes were inclined to suppress emotions and lacked the capacity to reappraise emotions (except women with ANBP). Correlational relations of suppression and reappraisal with anxiety and depression levels differed across ED groups. Emotion regulation problems were found across ED subtypes. However, the types of emotion regulation problems, and the effect of coexisting other emotional problems such as anxiety and depression may differ across ED subtypes. These findings illustrate the importance to of considering ED subtypes in emotion regulation research rather than consider ED as a whole.     

An empirical study of the classification of eating disorders

OBJECTIVE: The nosology for eating disorders, despite having been extensively revised over time, may not capture the natural clustering of eating-related pathology as it occurs in general population samples.METHOD: Detailed information about anorectic and bulimic behaviors was assessed through personal interviews of 2,163 Caucasian female twins from a population-based registry. Latent class analysis was applied to nine eating disorder symptoms to develop an empirically based typology. Demographic, comorbidity, personality, and co-twin diagnosis data were used to validate the resultant classes.RESULTS: A six-class solution provided the best fit. One class displayed distorted eating attitudes without low body weight. Two classes demonstrated low weight without the psychological features of eating disorders. Three classes broadly resembled the DSM-IV classifications of anorexia nervosa, bulimia nervosa, and binge-eating disorder. For all classes, and especially for the three that reflected current diagnoses of eating disorders, monozygotic twins resembled one another much more in terms of class membership than did dizygotic twins.CONCLUSIONS: The authors found within a community sample, and through an empirical method, classes of eating-related pathology that broadly resembled the current classifications of anorexia nervosa, bulimia nervosa, and binge-eating disorder. Additional classes were marked by either the psychological features of eating disorders or low body weight. Individuals in the three eating-disorder classes had similar personality profiles but displayed differences in symptom expression and co-twin risk for anorexia nervosa, bulimia nervosa, and obesity.     

Examining the utility of narrowing anorexia nervosa subtypes for adults

ObjectiveThe purpose of this investigation was to examine whether narrowing the criteria of anorexia nervosa (AN) subtypes among adults based on further delineations of current binge eating and purging (i.e., binge eating only, purging only, binge eating and purging, and restricting only) improves the potential clinical utility of the current DSM-5 system that specifies two types (i.e., current binge eating and/or purging and restricting, specified as the absence of current binge eating and/or purging).MethodSelf-reported eating disorder and psychiatric symptoms based on the Eating Disorder Questionnaire were examined in 347 adults from a multisite clinical sample who met DSM-IV criteria for AN. Classification based on binge eating and purging symptoms yielded the following subtypes: 118 restricting only (AN-R; no current binge eating or purging); 133 binge eating and purging (AN-B & P; current binge eating and purging); 43 binge eating only (AN-B; current binge eating and no current purging); and 53 purging only (AN-P; current purging and no current binge eating).ResultsThe AN-R group had lower current body mass index compared to AN-B & P and AN-P with no group differences in highest, lowest, or desired body mass index. The probability of amenorrhea was higher for the AN-R and AN-B & P groups than the AN-P group. The probability of diet pill use was elevated for the AN-B & P and AN-P groups compared to the AN-R group. The AN-P group also had a higher probability of fasting than the AN-R group. The probability of substance use including tobacco was lower in the AN-R group than the other three groups. No group differences were found on measures of hospitalization, body image, physical symptoms, exercise, or dieting behaviors.ConclusionsThese findings do not support the validity or clinical utility of classifying AN into narrower subtypes based on current binge eating, purging, and binge eating with purging given that few differences were found among groups who reported any combination of current binge eating and purging. Future research is needed to replicate these findings and to further examine the AN subtype classification schemes.     

The need to consume: Hoarding as a shared psychological feature of compulsive buying and binge eating

IntroductionCompulsive buying and binge eating are two frequently co-occurring psychiatric conditions. Hoarding, which is the psychological need to excessively gather and store items, is frequently associated with both compulsive buying severity and binge eating severity. In the present study, we explored whether different dimensions of hoarding are a shared feature of compulsive buying and binge eating.MethodParticipants consisted of 434 people seeking treatment for compulsive buying disorder. Registered psychiatrists confirmed the diagnosis of compulsive buying through semi-structured clinical interviews. Participants also completed measures to assess compulsive buying severity, binge eating severity, and dimensions of hoarding (acquisition, difficulty discarding, and clutter). Two-hundred and seven participants completed all three measures.ResultsSignificant correlations were found between compulsive buying severity and the acquisition dimension of hoarding. Binge eating severity was significantly correlated with all three dimensions of hoarding. Hierarchical regression analysis found that compulsive buying severity was a significant predictor of binge eating severity. However, compulsive buying severity no longer predicted binge eating severity when the dimensions of hoarding were included simultaneously in the model. Clutter was the only subscale of hoarding to predict binge eating severity in step two of the regression analysis.ConclusionOur results suggest that the psychological need to excessively gather and store items may constitute a shared process that is important in understanding behaviors characterized by excessive consumption such as compulsive buying and binge eating.