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

Are loss of control while eating and overeating valid constructs? A critical review of the literature

BACKGROUND

Binge eating is a marker of weight gain and obesity, and a hallmark feature of eating disorders. Yet its component constructs - overeating and loss of control (LOC) while eating - are poorly understood and difficult to measure.

OBJECTIVE

The objective of this study is to critically review the human literature concerning the validity of LOC and overeating across the age and weight spectrum.

DATA SOURCES

English-language articles addressing the face, convergent, discriminant and predictive validity of LOC and overeating were included.

RESULTS

Loss of control and overeating appear to have adequate face validity. Emerging evidence supports the convergent and predictive validity of the LOC construct, given its unique cross-sectional and prospective associations with numerous anthropometric, psychosocial and eating behaviour-related factors. Overeating may be best conceptualized as a marker of excess weight status.

LIMITATIONS

Binge eating constructs, particularly in the context of subjectively large episodes, are challenging to measure reliably. Few studies addressed overeating in the absence of LOC, thereby limiting conclusions about the validity of the overeating construct independent of LOC. Additional studies addressing the discriminant validity of both constructs are warranted.

DISCUSSION

Suggestions for future weight-related research and for appropriately defining binge eating in the eating disorders diagnostic scheme are presented.

Cognitive behaviour therapy response and dropout rate across purging and nonpurging bulimia nervosa and binge eating disorder: DSM-5 implications

BACKGROUND

With the imminent publication of the new edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), there has been a growing interest in the study of the boundaries across the three bulimic spectrum syndromes [bulimia nervosa-purging type (BN-P), bulimia nervosa-non purging type (BN-NP) and binge eating disorder (BED)]. Therefore, the aims of this study were to determine differences in treatment response and dropout rates following Cognitive Behavioural Therapy (CBT) across the three bulimic-spectrum syndromes.

METHOD

The sample comprised of 454 females (87 BED, 327 BN-P and 40 BN-NP) diagnosed according to DSM-IV-TR criteria who were treated with 22 weekly outpatient sessions of group CBT therapy. Patients were assessed before and after treatment using a food and binging/purging diary and some clinical questionnaires in the field of ED. "Full remission" was defined as total absence of binging and purging (laxatives and/or vomiting) behaviors and psychological improvement for at least 4 (consecutive).

RESULTS

Full remission rate was found to be significantly higher in BED (69.5%) than in both BN-P (p < 0.005) and BN-NP (p < 0.001), which presented no significant differences between them (30.9% and 35.5%). The rate of dropout from group CBT was also higher in BED (33.7%) than in BN-P (p < 0.001) and BN-NP (p < 0.05), which were similar (15.4% and 12.8%, respectively).

CONCLUSIONS

Results suggest that purging and non-purging BN have similar treatment response and dropping out rates, whereas BED appears as a separate diagnosis with better outcome for those who complete treatment. The results support the proposed new DSM-5 classification.

Subjective binge eating with compensatory behaviors: a variant presentation of bulimia nervosa

OBJECTIVES

To determine whether a variant bulimic-type presentation, whereby one meets criteria for bulimia nervosa (BN) except that binge eating episodes are not objectively large (i.e., "subjective bulimia nervosa," SBN), has comparable clinical severity to established eating disorders, particularly BN.

METHOD

Treatment-seeking adults with BN (N = 112), SBN (N = 28), anorexia nervosa restricting type (AN-R) (N = 45), and AN-binge/purge type (AN-B/P) (N = 24) were compared.

RESULTS

Overall, SBN could not be meaningfully distinguished from BN. SBN and BN had equivalent eating pathology, depression and anxiety symptoms, low quality of life, impulsivity, Axis I comorbidity, and lifetime psychiatric history, and comparable clinical severity to AN-R and AN-B/P.

DISCUSSION

Individuals with SBN, differing from BN only by the smaller size of their binge eating episodes, had a form of eating disorder comparable in clinical severity to threshold AN and BN and warranting clinical attention. Health professionals and the community require greater awareness of this variant to optimize detection, treatment-seeking, and outcomes.

Prevalence and correlates of dieting in college women: a cross sectional study

BACKGROUND

Dieting is a common practice among young women, irrespective of age, race, ethnicity, and weight. We aimed to determine the prevalence of dieting and its relationship with eating behavior, body weight, and body mass index (BMI) in college women.

METHODS

This was a cross-sectional survey of female students aged 18-35 years (n = 308). Measures included BMI, restraint, disinhibition, hunger, dieting, weight loss, and perceived weight.

RESULTS

A high percentage of college females consider themselves overweight or obese, despite having a BMI in the normal range. Dieting was practised by 43%, and 32% were avoiding weight gain, despite 78% having a healthy BMI. Women classified themselves as overweight or obese (27%), while only 11% were actually in these categories. Exercise was a common method of weight loss and positive associations were observed between dieting and BMI. Assessment of eating behavior showed that 27% were classified as high-restraint. Restraint and disinhibition were positively correlated with BMI.

CONCLUSION

Despite the widespread availability of nutrition information, there is incongruity in measured and perceived BMI in young educated women. Dieting practices and BMI are associated with restraint and disinhibition. Nutrition professionals should consider educating college women about healthy body weight regardless of their clients' BMI.

Longitudinal stability of binge-eating type in eating disorders

OBJECTIVE

The purpose of this study was to examine the 2-year longitudinal stability of objective bulimic (binge eating) episodes (OBEs) and subjective bulimic (binge eating) episodes (SBEs) in a multisite eating disorders sample.

METHOD

Participants included 288 females with eating disorder symptoms who were assessed every 6 months using the Eating Disorder Examination.

RESULTS

Markov modeling revealed considerable longitudinal variability between types of binge eating over 6-month time intervals with relatively higher probability estimates for consistency between OBEs and SBEs than specific transitions between types for the overall sample as well as for eating disorder diagnostic groups. Transition patterns examining all five time points indicated notable variability in binge-eating patterns among participants.

DISCUSSION

These findings suggest that although longitudinal patterns of binge types are variable among individuals with eating disorders, consistency in OBEs and SBEs was the most common pattern observed.

Objective and subjective binge eating in underweight eating disorders: associated features and treatment outcome

OBJECTIVE

To define the utility of the DSM-IV-TR definition of binge eating, as it applies to anorexia nervosa (AN) and underweight eating disorder not otherwise specified (ED-NOS).

METHOD

We investigated the psychopathological features associated with bulimic episodes in 105 underweight individuals with eating disorders who reported regular objective bulimic episodes with or without subjective bulimic episodes (OBE group, n = 33), regular subjective bulimic episodes only (SBE group, n = 36) and neither objective nor subjective bulimic episodes (n = 36, no-RBE group). The Eating Disorder Examination (EDE), anxiety, depression, and personality tests were administered before and upon completion of inpatient cognitive behavior therapy (CBT) treatment 6 months later.

RESULTS

Compared with the SBE group, OBE subjects had higher body mass index, and more frequent self-induced vomiting, while both OBE and SBE groups had more severe eating disorder psychopathology and lower self-directness than the no-RBE group. Dropout rates and outcomes in response to inpatient CBT were similar in the three groups.

DISCUSSION

Despite a few significant differences at baseline, the similar outcome in response to CBT indicates that categorizing patients with underweight eating disorder on the basis of the type or frequency of bulimic episodes is of limited clinical utility.

Empirical classification of eating disorders

Current diagnostic criteria for anorexia nervosa (AN) and bulimia nervosa (BN) account for a minority of individuals with clinically significant disorders of eating, raising concerns about the clinical utility of current definitions. This review examines evidence for the validity of current and alternative approaches to defining eating disorders and implications for draft criteria for the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). Although this review largely supports the predictive validity of distinctions among AN, BN, and the newly proposed binge eating disorder (BED), it also highlights that our tendency to "study what we define" has created a gap between the problems that people have and what we know about those problems. Future research on the causes and consequences of eating disorders should include more heterogeneous groups to enable identification of meaningful boundaries that distinguish between disorders based on etiological and predictive validity.

Phenotypes within sensory modulation dysfunction

Sensory modulation disorder (SMD) is a severe inability to regulate responses to everyday sensory stimulation to which most people easily adapt. It is estimated to affect 5% to 16% of the general population of children. Although heterogeneity is seen in the presentation clinically, previous research has not empirically investigated whether the clinical heterogeneity of SMD can be classified into subtypes. This study explores a cohort of 98 children identified with SMD at the Department of Pediatric Rehabilitation by a member of the occupational therapy team at The Children's Hospital of Denver. Two subtypes of SMD were identified through cluster analysis based on data from 4 parent-report instruments. The first subtype is characterized by sensory seeking/craving, hyperactive, impulsive, externalizing (eg, delinquent, aggressive), unsocial, inadaptive, and impaired cognitive/social behavior. The second subtype is characterized by movement sensitivity, emotionally withdrawal, and low energy/weak behavior. Findings from this study present a step toward understanding and classifying the complexities of children with SMDs.

Differentiating purging and nonpurging bulimia nervosa and binge eating disorder

OBJECTIVE

To explore similarities and differences in clinical and personality variables across three groups: binge eating disorder (BED), bulimia nervosa-purging type (BN-P), and bulimia nervosa-non purging type (BN-NP).

METHOD

The participants were 102 female eating disorders patients (34 BED, 34 BN-P, and 34 BN-NP) consecutively admitted to the eating disorders unit, at the University Hospital of Bellvitge, and diagnosed according to DSM-IV criteria.

RESULTS

BED patients were older, and more likely to have personal and family history of obesity. A gradient in psychopathological scores emerged with BN-P patients having higher pathological scores on the SCL-90-R, followed by BN-NP and BED patients. No statistically significant differences were observed in personality traits.

DISCUSSION

Our data supported that eating disorders (namely BED, BN-NP, and BN-P) followed a linear trend in general psychopathology. Whereas personality may represent a shared vulnerability factor, differences in clinical severity suggest there to be a continuum with BN-P being the most severe and BED being the least severe.

Clarifying boundaries of binge eating disorder and psychiatric comorbidity: a latent structure analysis

Binge eating disorder (BED) presents with substantial psychiatric comorbidity. This latent structure analysis sought to delineate boundaries of BED given its comorbidity with affective and anxiety disorders. A population-based sample of 151 women with BED, 102 women with affective or anxiety disorders, and 259 women without psychiatric disorders was assessed with clinical interviews and self-report-questionnaires. Taxometric analyses were conducted using DSM-IV criteria of BED and of affective and anxiety disorders. The results showed a taxonic structure of BED and of affective and anxiety disorders. Both taxa co-occurred at an above-chance level, but also presented independently with twice-as-large probabilities. Within the BED taxon, diagnostic co-occurrence indicated greater general psychopathology, lower social adaptation, and greater premorbid exposure to parental mood and substance disorder, but not greater eating disorder psychopathology. Eating disorder psychopathology discriminated individuals in the BED taxon from individuals in the affective and anxiety disorders taxon. Diagnostic criteria of BED were more indicative of the BED taxon than were criteria of affective and anxiety disorders. The results show that at the latent level, BED was co-occurring with, yet distinct from, affective and anxiety disorders and was not characterized by an underlying affective or anxiety disorder.

Stability and change in patterns of concerns related to eating, weight, and shape in young adult women: a latent transition analysis

Although college women are known to be at high risk for eating-related problems, relatively little is known about how various aspects of concerns related to eating, weight, and shape are patterned syndromally in this population. Moreover, the extent to which various patterns represent stable conditions or transitory states during this dynamic period of development is unclear. The present study used latent class and latent transition analysis (LCA/LTA) to derive syndromes of concerns related to eating, weight, and shape and movement across these syndromes in a sample of 1,498 women ascertained as first-time freshmen and studied over 4 years. LCA identified 5 classes characterized by (a) no obvious pathological eating-related concerns (prevalence: 28%-34%); (b) a high likelihood of limiting attempts (prevalence: 29%-34%); (c) a high likelihood of overeating and binge eating (prevalence: 14%-18%); (d) a high likelihood of limiting attempts and overeating or binge eating (prevalence: 14%-17%); and (e) pervasive bulimic like concerns (prevalence: 6%-7%). Membership in each latent class tended to be stable over time. When movement occurred, it tended to be to a less severe class. These findings indicate that there are distinct, prevalent, and relatively stable forms of eating-related concerns in college women.

Objective and subjective bulimic episodes in the classification of bulimic-type eating disorders: another nail in the coffin of a problematic distinction

We sought to further explore the validity of the distinction between objective bulimic episodes (OBEs) and subjective bulimic episodes (SBEs) in the study of bulimic-type eating disorders. Drawing on data obtained at the second, interview phase of a large-scale epidemiological study, we identified mutually exclusive subgroups of women with bulimic-type eating disorders who engaged in regular OBEs but not SBEs (n = 37) or regular SBEs but not OBEs (n = 52). These subgroups were compared on a wide range of outcomes, including socio-demographic characteristics, current levels of eating disorder psychopathology, general psychological distress and impairment in role functioning, current and lifetime impairment in quality of life specifically associated with an eating problem, (self)-recognition of an eating problem, health service utilization and use of psychotropic medication. The only difference between groups was that participants who reported regular OBEs were heavier than those who reported regular SBEs. The findings converge with those of previous research in suggesting that bulimic-type eating disorders characterized by regular SBEs, but not OBEs, do not differ in any clinically meaningful way from those characterized by regular OBEs, but not SBEs. Inclusion of bulimic-type eating disorders characterized by regular SBEs as a provisional category requiring further research in DSM-V appears warranted.

Use of extreme weight-control behaviors in the absence of binge eating with and without subjective bulimic episodes: a community-based study

BACKGROUND AND METHODS

In a community sample of women who reported the use of extreme weight-control behaviors in the absence of binge eating, subgroups of participants who reported (n = 23) and who did not report (n = 42) recurrent subjective bulimic episodes (SBEs) were compared on a range of outcomes, including current levels of eating disorder and comorbid psychopathology.

RESULTS

Participants who reported SBEs had higher levels of eating disorder psychopathology, impairment in role functioning, and general psychological distress, than those who did not. Scores on these measures among participants who reported SBEs were similar to those of eating disorder patients receiving specialist treatment, whereas those of participants who did not have recurrent SBEs tended to be intermediate between eating disorder patients and healthy women.

DISCUSSION

The findings are consistent with the hypothesis that it is the combination of SBEs and extreme weight-control behaviors, rather than extreme weight-control behaviors per se, that indicates clinical significance.

Broad categories for the diagnosis of eating disorders (BCD-ED): an alternative system for classification

OBJECTIVE

Eating Disorder Not Otherwise Specified (EDNOS), a residual category in DSM-IV, is the most commonly used eating disorder diagnosis in clinical settings. A diagnostic scheme, termed Broad Categories for the Diagnosis of Eating Disorders (BCD-ED), is proposed to diminish use of the EDNOS category while preserving the existing eating disorder categories. The objective of this review was to examine the advantages and disadvantages of adopting this scheme for DSM-V.

METHOD

We reviewed published studies to assess the proportion of individuals with DSM-IV EDNOS that would be reclassified under the BCD-ED system, support for the hierarchy of the three categories, and the potential risk of "overdiagnosis."

RESULTS

Adopting the BCD-ED scheme would have both advantages and disadvantages, but would likely substantially reduce the number of individuals who would receive an EDNOS diagnosis.

DISCUSSION

BCD-ED is a potential method of addressing the high frequency of EDNOS, but would be a major change in how eating disorders are categorized.

Validity and utility of the current definition of binge eating

OBJECTIVE

Binge eating, a cardinal symptom of bulimia nervosa (BN) and binge eating disorder (BED), continues to pose challenges in terms of its definition and thus construct validity and clinical utility. This article reviews the available empirical data that support or refute the current DSM-IV-TR defined characteristics of a binge episode.

METHOD

A systematic literature review was conducted using Medline/PubMed electronic database on DSM-IV-TR defined binge characteristics and associated attributes.

RESULTS

Data support the current DSM guidelines indicating that binge episodes typically occur in less than 2 h. Size of binge episodes has variability across BN and BED diagnostic groups. Loss of control (LOC) continues to be a core feature of binge eating. Negative affect is the most widely reported antecedent. Strikingly, little is known about binge episodes among individuals with anorexia nervosa-binge/purge subtype.

DISCUSSION

Available empirical evidence supports the current DSM duration and LOC attributes of a binge episode in BN and BED. However, a more controversial issues is the extent to which size is important in the definition of a binge episode (e.g., subjective vs. objective episodes) across diagnostic categories and the extent to which binge size informs prognosis, treatment, and clinical outcomes. Further study of binge eating attributes in AN is needed.

The validity and utility of subtyping bulimia nervosa

OBJECTIVE

To review the evidence for the validity and utility of subtyping bulimia nervosa (BN) into a purging (BN-P) and a nonpurging subtype (BN-NP), and of distinguishing BN-NP from binge eating disorder (BED), by comparing course, complications, and treatment.

METHOD

A literature search of psychiatry databases for studies published in peer-reviewed journals that used the DSM-definitions of BN and BED, and included both individuals with BN-NP and individuals with BN-P and/or BED.

RESULTS

Twenty-three studies compared individuals with BN-NP (N = 671) to individuals with BN-P (N = 1795) and/or individuals with BED (N = 1921), two of which reported on course, 12 on comorbidity and none on treatment response-the indicators for validity and clinical utility. The differences found were mainly quantitative rather than qualitative, suggesting a gradual difference in severity from BN-P (most severe) through BN-NP to BED (least severe).

DISCUSSION

None of the comparisons provided convincing evidence for the validity or utility of the BN-NP diagnosis. Three options for the position of BN-NP in DSM-V were suggested: (1) maintaining the BN-NP subtype, (2) dropping nonpurging compensatory behavior as a criterion for BN, so that individuals currently designated as having BN-NP would be designated as having BED, and (3) including BN-NP in a broad BN category.

Lifetime course of eating disorders: design and validity testing of a new strategy to define the eating disorders phenotype

BACKGROUND

Aetiological studies of eating disorders would benefit from a solution to the problem of instability of eating disorder symptoms. We present an approach to defining an eating disorders phenotype based on the retrospective assessment of lifetime eating disorders symptoms to define a lifetime pattern of illness. We further validate this approach by testing the most common lifetime categories for differences in the prevalence of specific childhood personality traits.

METHOD

Ninety-seven females participated in this study, 35 with a current diagnosis of restricting anorexia nervosa, 32 with binge/purging subtype of anorexia nervosa and 30 with bulimia nervosa. Subjects were interviewed by a newly developed EATATE Lifetime Diagnostic Interview for a retrospective assessment of the lifetime course of eating disorders symptoms and childhood traits reflecting obsessive-compulsive personality.

RESULTS

The data illustrate the extensive instability of the eating disorders diagnosis. Four most common lifetime diagnostic categories were identified that significantly differ in the prevalence of childhood traits. Perfectionism and rigidity were more common in groups with a longer duration of underweight status, longer episodes of severe food restriction, excessive exercising, and shorter duration of binge eating.

CONCLUSIONS

The assessment of lifetime symptoms may produce a more accurate definition of the eating disorders phenotype. Obsessive-compulsive traits in childhood may moderate the course producing longer periods of underweight status. These findings may have important implications for nosology, treatment and future aetiological studies of eating disorders.

The course of illness following inpatient treatment of adults with longstanding eating disorders: a 5-year follow-up

OBJECTIVE

The objectives of this article were to study the course and outcome of longstanding eating disorders (ED) 5 years after completing treatment and to identify subgroups of patients with different course and outcome.

METHOD

A total of 77 patients with a mean age of 30 years were assessed at the beginning and end of in-patient therapy and at 1-, 2- and 5-year follow-up, respectively.

RESULTS

Of the 90% who participated in the 5-year follow-up, 46 patients (61%) had improved, and 30 (39%) did not meet diagnostic criteria for an ED. Cluster analysis identified a group of patient with no improvement over time.

CONCLUSION

Overall, the course is favourable, but a subgroup of patients with no improvement over time may need intensified treatment efforts.

Gender, school and academic year differences among Spanish university students at high-risk for developing an eating disorder: an epidemiologic study

BACKGROUND

The aim of this study was to assess the magnitude of the university population at high-risk of developing an eating disorder and the prevalence of unhealthy eating attitudes and behaviours amongst groups at risk; gender, school or academic year differences were also explored.

METHODS

A cross-sectional study based on self-report was used to screen university students at high-risk for an eating disorder. The sample size was of 2551 university students enrolled in 13 schools between the ages of 18 and 26 years. The instruments included: a social-demographic questionnaire, the Eating Disorders Inventory (EDI), the Body Shape Questionnaire (BSQ), the Symptom Check List 90-R (SCL-90-R), and the Self-Esteem Scale (RSE). The sample design is a non-proportional stratified sample by academic year and school. The prevalence rate was estimated controlling academic year and school. Logistic regression analysis was used to investigate adjusted associations between gender, school and academic year.

RESULTS

Female students presented unhealthy weight-control behaviours as dieting, laxatives use or self-induced vomiting to lose weight than males. A total of 6% of the females had a BMI of 17.5 or less or 2.5% had amenorrhea for 3 or more months. In contrast, a higher proportion of males (11.6%) reported binge eating behaviour. The prevalence rate of students at high-risk for an eating disorder was 14.9% (11.6-18) for males and 20.8% (18.7-22.8) for females, according to an overall cut-off point on the EDI questionnaire. Prevalence rates presented statistically significant differences by gender (p < 0.001) but not by school or academic year.

CONCLUSION

The prevalence of eating disorder risk in university students is high and is associated with unhealthy weight-control practices, similar results have been found in previous studies using cut-off points in questionnaires. These results may be taken into account to encourage early detection and a greater awareness for seeking treatment in order to improve the diagnosis, among students on university campuses.

Health service utilization for eating disorders: findings from a community-based study

BACKGROUND

Prior use of health services was examined in a community sample of women with bulimic-type eating disorders.

METHOD

Participants (n = 159) completed a structured interview for the assessment of eating disorder psychopathology as well as questions concerning treatment-seeking and type of treatment received.

RESULTS

Whereas a minority (40.3%) of participants had received treatment for an eating problem, most had received treatment for a general mental health problem (74.2%) and/or weight loss (72.8%), and all had used one or more self-help treatments. Where treatment was received for an eating or general mental health problem, this was from a primary care practitioner in the vast majority of cases. Only half of those participants who reported marked impairment associated with an eating problem had ever received treatment for such a problem and less than one in five had received such treatment from a mental health professional.

CONCLUSION

Women with bulimic-type eating disorders rarely receive treatment for an eating problem, but frequently receive treatment for a general mental health problem and/or for weight loss. The findings underscore the importance of programs designed to improve the detection and management of eating disorders in primary care.

Self-recognition of disordered eating among women with bulimic-type eating disorders: A community-based study

OBJECTIVE

Self-recognition of eating-disordered behavior was examined in a community sample of young adult women (n = 158) with bulimic eating disorders.

METHOD

A vignette was presented describing a fictional person meeting diagnostic criteria for bulimia nervosa. Participants were asked whether they might currently have a problem such as the one described. Scores on measures of eating disorder psychopathology, functional impairment and general psychological distress were compared between participants who recognized a problem with their eating and those who did not.

RESULTS

Participants who recognized a problem with their eating (n = 86, 51.9%) had higher levels of eating disorder psychopathology and general psychological distress, were more likely to engage in self-induced vomiting, and tended to be heavier, than those who did not (n = 72, 48.1%). In addition, participants who recognized a problem were more likely to have received treatment for an eating or weight problem. In multivariate analysis, the occurrence of self-induced vomiting and higher body weight were the only variables significantly associated with recognition.

CONCLUSION

Poor recognition of eating-disordered behavior may be conducive to low or inappropriate treatment seeking among individuals with bulimic- type eating disorders. The perception that only disorders involving self-induced vomiting are pathological may need to be addressed in prevention programs.

Use of extreme weight control behaviors with and without binge eating in a community sample: implications for the classification of bulimic-type eating disorders

OBJECTIVE AND METHOD

To inform the classification of bulimic-type eating disorders not meeting formal diagnostic criteria for bulimia nervosa (BN), levels of eating disorder psychopathology and functional impairment associated with subjective and objective bulimic episodes (SBEs and OBEs) and purging and nonpurging methods of weight control were examined in a large community-based sample of women (n = 5,232).

RESULTS

Participants who reported recurrent bulimic episodes had significantly higher levels of eating disorder psychopathology and functional impairment than those who did not and this was the case whether the episodes were objective or subjective. Similarly, participants who reported the use of extreme weight control behaviors had higher levels of eating disorder psychopathology and functional impairment than those who did not, and this was the case whether purging or nonpurging behaviors were employed. The combination of bulimic episodes and extreme weight control behaviors was associated with particularly high levels of eating disorder psychopathology and functional impairment.

CONCLUSION

The combination of bulimic episodes, objective or subjective, and extreme weight control behaviors, purging or nonpurging, is significant in terms of impairment in psychosocial functioning among individuals affected by eating disorders not meeting formal diagnostic criteria for BN. The combination of SBEs and extreme weight control behaviors, in particular, warrants further investigation.

Correlates of self-induced vomiting and laxative misuse in a community sample of women

The correlates of self-induced vomiting and laxative misuse were examined in a large community sample of young adult women (N = 5255). Scores on measures of eating disorder psychopathology, general psychological distress, functional impairment, as well as the use of health services for an eating or weight problem were compared among participants who reported regular self-induced vomiting, but not laxative misuse (N = 59), and those who reported regular misuse of laxatives, but not vomiting (N = 39). Individuals who misused laxatives were older, perceived poorer physical health, and were less likely to have sought treatment specifically for a problem with eating than those who engaged in self-induced vomiting. In all other respects, the groups were similar. However, individuals who regularly engaged in both forms of purging (N = 8) had particularly high levels of eating disorder and comorbid psychopathology. The perception among women of normal weight that only syndromes involving the use of self-induced vomiting constitute an eating disorder may need to be addressed in prevention programs. The combination of self-induced vomiting and laxative misuse may indicate a particularly severe psychiatric disturbance.

The comparative utility of statistically derived eating disorder clusters and DSM-IV diagnoses: relationship to symptomatology and psychiatric comorbidity at intake and follow-up

INTRODUCTION

The classification of eating disorders has been a matter of considerable debate. The present paper extends previous work and aimed to compare the utility of statistically derived clusters of eating disorders and conventional diagnoses.

METHODS

Adult female eating disorder patients who had previously been classified on the basis of cluster analysis of key diagnostic variables were examined on measures of eating disorder symptomatology and psychiatric comorbidity at intake (N=601) and subsequent follow-up after 6 and 36 months (N=349, N=322, respectively).

RESULTS

Compared to DSM-IV diagnoses, clusters demonstrated greater utility in terms of more distinct between-group differences and higher effect sizes in relation to a wide range of variables. The greater utility of clusters was in important respects due to the reallocation of EDNOS patients to more relevant alternative categories and to a greater emphasis on psychological and behavioural features of eating disorders.

CONCLUSIONS

In order to achieve a better classification of eating disorders, it will be important to place increased emphasis on common psychological features. There is a need to move away from increased use of subtypes and toward a definition of eating disorder per se.

Validation of the portuguese version of the Questionnaire on Eating and Weight Patterns: revised (QEWP-R) for the screening of binge eating disorder

OBJECTIVE: The present paper describes the validation of the Questionnaire on Eating and Weight Patterns-Revised (QEWP-R) designed for the diagnosis of binge eating disorder (BED) and sub-clinical binge eating. METHODS: 89 overweight women seeking treatment for binge eating and/or obesity were assessed with the Portuguese version of the Questionnaire of Eating and Weight Patterns and were, subsequently, interviewed with the eating disorders module of the Structured Clinical Interview for DSM-IV (SCID-I/P). Rates of binge eating disorder and sub-clinical cases of binge eating obtained with the Questionnaire on Eating and Weight Patterns-Revised were then compared to those obtained with the Structured Clinical Interview for DSM-IV. RESULTS: In the identification of binge eating, irrespective of the presence of all criteria for binge eating disorder the QEWP-R Questionnaire on Eating and Weight Patterns-Revised yielded a sensitivity value of 0.88, a specificity value of 0.63 and a positive predictive value of 0.825. Rates for the identification of the full syndrome of binge eating disorder were: sensitivity value of 0.548, a specificity value of 0.8 and a positive predictive value of 0.793. CONCLUSIONS: The Questionnaire on Eating and Weight Patterns-Revised can be useful in a first-step screening procedure to identify probable cases of binge eating. It can be useful as a screening tool and as a first step of clinical assessment of patients seeking treatment for binge eating and/or obesity.

Purging disorder: an ominous variant of bulimia nervosa?

OBJECTIVE

The current study evaluates the clinical significance and distinctiveness of purging disorder (PD), an eating disorder characterized by recurrent purging in the absence of objective binge episodes (OBE) among normal-weight individuals.

METHOD

Women with PD (n = 37), bulimia nervosa (BN; n = 39), or no eating disorder (n = 35) completed clinical assessments. Women with PD (n = 23) and BN (n = 25) completed 6-month follow-up assessments.

RESULTS

Compared with controls, both eating-disordered groups reported significantly higher eating, Axis I, and Axis II pathology. Compared with BN, PD was associated with significantly lower eating concerns, disinhibition, and hunger. At 6-month follow-up, rates of remission did not differ significantly between PD and BN, and crossover between disorders was rare.

CONCLUSION

PD appears to be a clinically significant and potentially distinctive eating disorder.

Adolescents with bulimia nervosa and eating disorder not otherwise specified-purging only

OBJECTIVE

The purpose of the study was to better understand the phenomenology of bulimic symptomatology in an adolescent clinic sample.

METHOD

Adolescents with bulimia nervosa (BN; n = 36) and eating disorders not otherwise specified-purging but no objective bulimic episodes (EDNOS-P; n = 20) were compared on the Eating Disorder Examination (EDE), the Beck Depression Inventory (BDI), the Rosenberg Self-Esteem Scale (RSES), and the Schedule for Affective Disorders and Schizophrenia for School-Age Children (K-SADS).

RESULTS

Subjects with EDNOS-P and BN were equivalent in terms of age and weight, but were less likely to have intact families. Nearly one half of EDNOS-P subjects purged exclusively outside of eating episodes in which they experienced a sense of loss of control. Although still at clinically significant levels, EDNOS-P subjects reported less concerns regarding weight, shape, and eating relative to BN. Groups were not significantly different on psychiatric comorbidity, but differed on self-esteem.

DISCUSSION

Results prompt reappraisal of current criteria of BN to encompass those who purge without binge eating.

Eating disorder NOS (EDNOS): an example of the troublesome "not otherwise specified" (NOS) category in DSM-IV

The "Not Otherwise Specified" (NOS) category within DSM-IV is designed for disorders of clinical severity that are not specified within broad diagnostic classes. "NOS" diagnoses are intended to be residual categories and they tend to be neglected by researchers. This can be inappropriate. The problems associated with certain NOS diagnoses are well illustrated by "Eating Disorder NOS" (sometimes termed EDNOS), which is the most common category of eating disorder encountered in routine clinical practice yet it has barely been studied. Indeed, there has been no research on its treatment. Interim and longer-term conceptual and practical solutions to the anomalous status of eating disorder NOS are proposed including the creation of a new diagnosis termed "mixed eating disorder". Several of these solutions are of relevance to NOS categories in general. All the solutions should fulfil criteria for clinical utility.

Categorical versus dimensional models of eating disorders: an examination of the evidence

OBJECTIVE

Eating disorders have been conceptualized as discrete syndromes or categories and as dimensions that differ in degree among individuals. Until recently, researchers have not directly addressed which of these models, categorical versus dimensional, is most valid.

METHODS

The primary objective of this review was to examine the evidence related to the validity of dimensional versus categorical models of eating disorders.

RESULTS

Findings from a series of taxometric studies have suggested that a conceptual representation of eating disorders may involve a latent taxon, related to binge eating (and possibly purging), and one or more dimensions. These studies found that binge eating was identified as a factor that does not occur on a continuum with anorexia nervosa, restricting subtype. Restricting subtype anorexia is continuous with normalcy, however.

DISCUSSION

These findings should be viewed as preliminary evidence that may have implications for the etiology, assessment, prevention, and treatment of eating disorders.

Validity of the Eating Disorder Examination Questionnaire (EDE-Q) in screening for eating disorders in community samples

In order to examine the concurrent and criterion validity of the questionnaire version of the Eating Disorders Examination (EDE-Q), self-report and interview formats were administered to a community sample of women aged 18-45 (n = 208). Correlations between EDE-Q and EDE subscales ranged from 0.68 for Eating Concern to 0.78 for Shape Concern. Scores on the EDE-Q were significantly higher than those of the EDE for all subscales, with the mean difference ranging from 0.25 for Restraint to 0.85 for Shape Concern. Frequency of both objective bulimic episodes (OBEs) and subjective bulimic episodes (SBEs) was significantly correlated between measures. Chance-corrected agreement between EDE-Q and EDE ratings of the presence of OBEs was fair, while that for SBEs was poor. Receiver operating characteristic (ROC) analysis, based on a sample of 13 cases, indicated that a score of 2.3 on the global scale of the EDE-Q in conjunction with the occurrence of any OBEs and/or use of exercise as a means of weight control, yielded optimal validity coefficients (sensitivity = 0.83, specificity = 0.96, positive predictive value = 0.56). A stepwise discriminant function analysis yielded eight EDE-Q items which best distinguished cases from non-cases, including frequency of OBEs, use of exercise as a means of weight control, use of self-induced vomiting, use of laxatives and guilt about eating. The EDE-Q has good concurrent validity and acceptable criterion validity. The measure appears well-suited to use in prospective epidemiological studies.

Psychotherapy for bulimia nervosa and binging

BACKGROUND

Bulimia nervosa and related syndromes such as binge eating disorder are common in young Western women. A specific manual-based form of cognitive behaviour therapy (CBT) has been developed for the treatment of bulimia nervosa (CBT-BN). Other psychotherapies, some from a different theoretical framework, and some modifications of CBT are also used.

OBJECTIVES

To evaluate the efficacy of CBT and CBT-BN and compare them with other psychotherapies in the treatment of adults with bulimia nervosa or related syndromes of recurrent binge eating.

SEARCH STRATEGY

A handsearch of The International Journal of Eating Disorders since its first issue; database searches of MEDLINE, EXTRAMED, EMBASE, PsycInfo, CURRENT CONTENTS, LILACS, SCISEARCH, CENTRAL and the The Cochrane Collaboration Depression, Anxiety & Neurosis Controlled Trials Register; citation list searching and personal approaches to authors were used.

SELECTION CRITERIA

All studies that have tested any form of psychotherapy for adults with non-purging bulimia nervosa, binge eating disorder and/or other types of eating disorders of a bulimic type (eating disorder, not otherwise specified, or EDNOS), and which applied a randomised controlled and standardised outcome methodology.

DATA COLLECTION AND ANALYSIS

Data were analysed using the Review Manager software program. Relative risks were calculated for binary outcome data. Standardized mean differences were calculated for continuous variable outcome data. A fixed effects model was used to analyse the data. Sensitivity analyses of a number of measures of trial quality were conducted. Data were not reported in such a way to permit subgroup analyses, but the effects of treatment on depressive symptoms, psychosocial and/or interpersonal functioning, general psychiatric symptoms and weight were examined where possible. Funnel plots were drawn to investigate the presence of publication bias.

MAIN RESULTS

The review supported the efficacy of cognitive-behavioural psychotherapy (CBT) and particularly CBT-BN in the treatment of people with bulimia nervosa and also (but less strongly due to the small number of trials) related eating disorder syndromes. CBT was also shown to be effective in group settings. Other psychotherapies were also efficacious, particularly interpersonal psychotherapy in the longer-term. Self-help approaches that used highly structured CBT treatment manuals, were promising albeit with more modest results generally, and their evaluation in bulimia nervosa merits further research. Exposure and Response Prevention did not appear to enhance the efficacy of CBT.Psychotherapy alone is unlikely to reduce or change body weight in people with bulimia nervosa or similar eating disorders.

REVIEWERS' CONCLUSIONS

There is a small body of evidence for the efficacy of cognitive-behaviour therapy in bulimia nervosa and similar syndromes, but the quality of trials is very variable and sample sizes are often small. More trials of CBT are needed, particularly for binge eating disorder and other EDNOS syndromes. Trials evaluating other psychotherapies and less intensive psychotherapies should also be conducted.

What is this thing called BED? Current status of binge eating disorder nosology

OBJECTIVE

Although binge eating has been recognized as a clinically relevant behavior among the obese for more than four decades, the concept of binge eating disorder (BED) as a distinct psychiatric diagnosis is of much more recent origin. This article presents four ways of conceptualizing BED: a distinct disorder in its own right, as a variant of bulimia nervosa, as a useful behavioral subtype of obesity, and as a behavior that reflects psychopathology among the obese. It also summarizes the evidence supporting and disconfirming each model.

METHOD

The literature subsequent to the development of DSM-IV regarding the reliability and validity of BED and related conditions was reviewed selectively.

RESULTS

The preponderance of the evidence suggests that BED differs importantly from purging bulimia nervosa and that BED is not a strikingly useful behavioral subtype of obesity.

DISCUSSION

Further study is needed to definitively determine the validity of BED as a distinct eating disorder.

Refining the definition of binge eating disorder and nonpurging bulimia nervosa

The diagnostic concept of binge eating disorder (BED) was introduced in response to the clinical observation of Stunkard (1959) that some people with obesity have recurrent episodes of binge eating. We suggest that the DSM-IV concept of BED has resulted in the recruitment of heterogeneous research samples, amongst which are some people with BED, as described by Stunkard, some with bulimia nervosa, some with other types of eating disorder, and some with no eating disorder. We consider the difficulties distinguishing BED from other forms of overeating, especially in patients with obesity, and from nonpurging bulimia nervosa. We propose revised diagnostic criteria for BED and bulimia nervosa that are designed to minimize these problems.

The spectrum of eating disorders in young women: a prevalence study in a general population sample

OBJECTIVE

The present study aims to evaluate the prevalence and characteristics of the whole spectrum of eating disorders (ED) in a representative sample of young women.

METHOD

All female subjects aged 18 to 25 who resided in two areas (urban and suburban) of a large city were involved in the study. All women (N = 934) underwent a clinical interview which included the structured clinical interview for DSM-IV.

RESULTS

Lifetime anorexia nervosa (AN) and bulimia nervosa (BN) were diagnosed respectively in 2.0% and 4.6% of the subjects. The prevalence of lifetime atypical ED was 4.7% and that of binge eating disorder (BED) was 0.6%. The degree of urbanization has a significant impact on the prevalence of AN, BN, and BED. Social class, professional status, and education were not associated with an increased risk of reporting an ED, whereas the number of hypocaloric diets, having been a victim of childhood abuse, and, in BN, ever being overweight are significantly associated with ED.

CONCLUSIONS

Our findings have confirmed the importance of community studies to improve our knowledge about factors that have some influence on pathogenesis, treatment referral, and outcome.

Prevalence of abnormal eating behaviours and inappropriate methods of weight control in young women from Brazil: a population-based study

OBJECTIVE

The aim of this epidemiological investigation was to study the prevalence of abnormal eating behaviours in a community sample of young women from Porto Alegre, RS, Brazil.

METHODS

The research team visited 1524 randomly selected households in Porto Alegre and invited all of the women aged 12-29 years to participate in the study: 513 women subsequently completed a socio-economic and demographic questionnaire, the Bulimic Investigatory Test (BITE) and the Eating Attitudes Test (EAT-26).

RESULTS

Clinically significant disturbed eating behaviour was revealed in the 16.5% of women who had EAT scores above the cut-off point of 21; 2.9% also had BITE symptom scores of > or = 20. The participants were categorised into three groups on the basis of a new variable combining both instruments: those with abnormal eating behaviours (10.9%), those with unusual eating patterns (23.8%), and those with normal eating behaviours (60.2%). Abnormal eating behaviours were significantly more prevalent in the 16-19 year age range (p = 0.007) and were also more prevalent among overweight/obese women (p = 0.009). Laxative use was reported by 8.5% of the women, followed by fasting (3.1%), use of diuretics (2.8%) and vomiting (1.4%).

CONCLUSIONS

Abnormal eating behaviours are fairly common among young women in Brazil. In comparison with other population studies, this survey showed a similar use of laxatives, less self-induced vomiting and a greater use of diet pills (probably because they are less strictly controlled in Brazil). Educational programmes aimed at preventing abnormal eating behaviours and developing healthy weight control practices among children and young adolescents should become public health priorities.

Stigmatisierung essgestörter Frauen in Abhängigkeit vom diagnostischen Ansatz und der Form der Essstörung

Zusammenfassung. Theoretischer Hintergrund: Zwei grundsätzlich verschiedene Konzepte zum Verständnis und zur Diagnostik von Essstörungen bestimmen die klinische Praxis und Forschung. Ein wesentlicher Unterschied zwischen den beiden Modellen liegt darin, ob sie die Essstörungen Anorexia und Bulimia Nervosa als zwei eigenständige Krankheitsbilder oder als verschiedene Ausdrucksformen derselben zugrundeliegenden Dynamik verstehen. Fragestellung: In dieser explorativen Studie wurde untersucht, ob die verschiedenen Ansätze einen unterschiedlichen Einfluss auf die Stigmatisierung (gemessen durch räumliche Nähe) essgestörter Frauen haben und ob sich der Einfluss für die verschiedenen Ausdrucksformen gestörten Essverhaltens unterschiedlich gestaltet. Methode: Diagnoseansatz und Form der Essstörung wurden in einem experimentellen Setting variiert. Versuchspersonen waren 44 Frauen, die eine Interaktion mit einer essgestörten Frau erwarteten. Gemessen wurde der gewählte Abstand der Sitzposition sowie die Assoziationen hinsichtlich der erwarteten Interaktionspartnerin. Ergebnisse: Die Ergebnisse zeigen, dass das Ausmaß an Stigmatisierung durch eine Interaktion des diagnostischen Ansatzes mit der Art der Essstörung bedingt ist. Schlussfolgerung: Ausschlaggebend scheint der Inhalt des Stereotyps zu sein, der sich für Anorexie und Bulimie sehr unterscheidet und der durch den diagnostischen Ansatz vorgegeben zu werden scheint.

Correlates of subjective and objective binge eating in binge-purge syndromes

OBJECTIVE

Research has begun to challenge the idea that a large amount of food is a diagnostically relevant distinction in classifying binge eating. This study examined the relationship between both objective and subjective (i.e., feeling out of control while eating an appropriate amount of food) binge eating frequency and factor analytically derived measures of dieting and psychopathology.

METHOD

Participants were 40 women who were admitted for inpatient treatment for bulimia nervosa, anorexia nervosa, binge-purge type, or eating disorder not otherwise specified with binge-purge symptoms.

RESULTS

Controlling for subjective binge frequency, neither the psychopathology nor the dieting factors were related to objective binge frequency. Controlling for objective binge frequency, dieting, but not psychopathology, was related to subjective binge frequency. There was no correlation between frequency of subjective and objective binge eating.

DISCUSSION

The results are discussed in light of research on restrained eating. Implications for diagnosis and the role of loss of control in defining binge behavior are also discussed.

On the relation of flexible and rigid control of eating to body mass index and overeating in patients with binge eating disorder

OBJECTIVE

To examine the relationship of flexible and rigid dimensions of restrained eating to body mass index (BMI) and overeating in outpatients with binge eating disorder (BED).

METHOD

Participants were 148 consecutive outpatients who met criteria for BED. The Three-Factor Eating Questionnaire (TFEQ) was administered to assess Cognitive Restraint, Hunger, and Disinhibition. The TFEQ also contains two Cognitive Restraint subscales--Flexible Control and Rigid Control. The Eating Disorder Examination-Questionnaire version (EDE-Q) was administered to assess frequency of different forms of overeating during the past 28 days and the attitudinal features of eating disorders.

RESULTS

Flexible Control and Rigid Control were significantly correlated with each other. They were both negatively correlated with BMI, but neither was significantly correlated with the frequency of binge eating or other forms of overeating. In addition, Flexible Control and Rigid Control predicted almost the same amount of variance in BMI.

DISCUSSION

BED patients exhibit flexible and rigid control of eating that is related to BMI, but not to the frequency of binge eating or other forms of overeating. Results of the present study provide preliminary evidence that flexible and rigid control of eating may not be a useful distinction in BED patients. However, increased restraint, regardless of type, may prove to be of benefit with regard to weight control and may not have adverse effects on binge eating in obese BED patients.

Importance of size in defining binge eating episodes in bulimia nervosa

OBJECTIVE

This study sought to determine if amount of food consumed is important in defining binge eating episodes in individuals with bulimia nervosa (BN).

METHOD

Women (N = 30) with DSM-IV BN (OBN) and women (N = 25) who would have met DSM-IV criteria for BN except that their binge episodes were not objectively large (SBN) were recruited from the community. Subjects completed telephone interviews and questionnaires.

RESULTS

Results demonstrated no significant differences between women with OBN and SBN in levels of dietary restraint, disinhibition, or hunger; no significant differences in general psychopathology; and significant differences in frequency of binge/purge episodes and impulsiveness. Differences in impulsiveness remained after controlling for frequency of binge/purge episodes.

DISCUSSION

These results partially validate current diagnostic criteria for bulimia nervosa and elucidate one factor, impulsiveness, that may be important in understanding objective binge episodes in bulimia nervosa.

Early puberty and early sexual activity are associated with bulimic-type eating pathology in middle adolescence

PURPOSE

To examine the associations between early pubertal timing and early advanced sexual development with bulimic-type eating pathology in middle adolescents.

METHODS

A total of 19,321 boys and 19,196 girls aged 14-16 years (mean age 15.3 years, standard deviation 0.59) responded to the School Health Promotion Study, a class-room survey among Finnish adolescents about health, health behavior, and school experiences. Bulimic-type eating pathology was assessed with a questionnaire formulated according to the fourth edition of the Diagnostic and Statistical Manual for Mental Disorders IV (DSM-IV) criteria. Pubertal timing was assessed by self-reported age at menarche or oigarche. Statistical methods were used chi-square and logistic regression.

RESULTS

Bulimic-type eating pathology among girls was associated with early menarche, early sexual experiences, and increasing age. Among boys, onset of ejaculations at the normative age was protective for bulimic-type eating pathology, and the risk was elevated among very early and late maturers. Early sexual experience was associated with bulimic-type eating pathology.

CONCLUSION

To prevent bulimia nervosa and to create opportunities for early intervention, attention should be paid to early maturing girls and off-time maturing boys, as well as those with early onset of sexual activity.

On the relation of attempting to lose weight, restraint, and binge eating in outpatients with binge eating disorder

OBJECTIVE

To examine the relationship among attempts to lose weight, restraint, and eating behavior in outpatients with binge eating disorder (BED).

RESEARCH METHODS AND PROCEDURES

Participants were 93 consecutive outpatients evaluated for a clinical trial who met Diagnostic and Statistical Manual, Fourth edition criteria for BED. The Eating Disorder Examination Interview was administered to assess attempts at weight loss, restraint, different forms of overeating, and the attitudinal psychopathology of eating disorders (i.e., concerns regarding eating, shape, and weight). In addition, the Three-Factor Eating Questionnaire was used to assess cognitive restraint, hunger, and disinhibition. Psychometrically established measures were given to assess body dissatisfaction, depression, and self-esteem.

RESULTS

The majority of participants (75.3%; N = 70) reported attempting to lose weight, but only 37.6% (N = 35) reported dietary restraint on at least half the days of the month. Dietary restraint and cognitive restraint were not associated with any form of binge eating or overeating. Dietary restraint and cognitive restraint were positively correlated with weight concern, shape concern, and body dissatisfaction, and negatively correlated with body mass index. To further examine the interplay between attempting to lose weight and restraint, three study groups were created: unrestrained nonattempters (21.5%, N = 20), unrestrained attempters (40.9%; N = 38), and restrained attempters (34.4%; N = 32). The three groups did not differ significantly on binge eating or other eating behaviors; however, significant differences were observed for weight concern, shape concern, and body dissatisfaction.

DISCUSSION

Attempts to lose weight and restraint are not synonymous for patients with BED. Although 75.3% of BED patients reported that they were attempting to lose weight, only 37.6% reported dietary restraint on at least half the days of the previous month. While restraint was negatively associated with body mass index, it was not related to binge eating or overeating. Our findings raise questions about prevailing models that posit restraint as a predominant factor in the maintenance of binge eating in BED.

Subthreshold binge eating disorder

OBJECTIVE

To examine the clinical features of subthreshold binge eating disorder (BED).

METHOD

Participants were recruited directly from the community as part of an ongoing study of risk factors for BED. Forty-four women with subthreshold BED were compared with 44 women with BED and 44 healthy controls on demographic characteristics, body mass index (BMI), eating disorder symptomatology, and psychiatric distress. Diagnoses were established using the Eating Disorder Examination (EDE). Participants completed the EDE-Questionnaire, the Brief Symptom Inventory, and were measured and weighed.

RESULTS

Adjusting for significant group differences in BMI, the two eating disorder groups did not differ significantly on measures of weight and shape concern, restraint, psychiatric distress, and history of seeking treatment for an eating or weight problem.

DISCUSSION

Given the importance of diagnostic status for access to treatment, further evaluation of the severity criterion specified for BED is needed.

Differences in daily stress, mood, coping, and eating behavior in binge eating and nonbinge eating college women

This study investigated differences between binge eaters and controls on measures of daily stress, mood, coping, and eating behavior. The same measures were also used to compare binge days to nonbinge days for the binge group. Participants included 20 college women who reported binge eating at least two times per week and 20 women who reported no disturbance in their eating behavior. They were asked to self-monitor their daily stress, coping, mood, and eating behavior for three weeks. Results indicated that the binge group reported more stress and negative mood over the three weeks than the control group. The binge group reported experiencing a similar number of stressful events on binge days as compared to nonbinge days, however, the impact of those events was much greater on binge days. The binge eaters also reported less positive mood and more episodes of eating on binge days. The groups did not differ in the number of coping strategies used. Stress and negative mood appear to be common antecedents for binge eating. The role of coping responses and daily eating behavior (i.e., restraint) on binge eating is somewhat less clear.

The relation between risk factors for binge eating and bulimia nervosa: a population-based female twin study

This study investigated the differential risk factors for the initiation of binge eating and the transition from binge eating to bulimia nervosa. Women from a population-based twin registry (850 complete pairs) were assessed with respect to specific measured variables (including demographics, religiosity, lifetime psychopathology, current symptomatology, and personality) and latent genetic and environmental variables. Because of the relative rarity of bulimia nervosa, statistical power was low, but findings suggested considerable overlap between the genetic risk factors for the development of binge eating and the genetic risk factors for the transition from binge eating to bulimia nervosa. Genetic risk factors for binge eating and bulimia nervosa may be largely similar, whereas nonshared environment may be important in influencing the risk for bulimia nervosa once binge eating is initiated.

Binge eating disorder: a review of the literature after publication of DSM-IV

Binge eating disorder (BED) is a syndrome marked by recurrent episodes of binge eating, in the absence of the regular use of inappropriate compensatory behaviors. Since the inclusion of BED in DSM-IV as a Diagnostic Category in Need of Further Research, a great deal of research has been conducted. This paper reviews research on BED since publication of DSM-IV in 1994. We conclude that questions about the definition of BED persist. Furthermore, recent studies which have strictly used the DSM-IV definition of BED have found that the full syndrome is found in less than 3% of obese adults seeking weight loss treatment and occurs in less than 1% of the general adult population. Binge eating is a common symptom associated with obesity, however. BED may be conceptualized as a psychiatric syndrome or it may be viewed as a behavioral symptom associated with obesity. We conclude that clarification of this conceptual issue is needed if research on BED is to progress.

Bulimia and bulimic behaviour in middle adolescence: more common than thought?

OBJECTIVE

Studies on the prevalence of bulimia and bulimic behaviour have focused on female populations from their late teens. This study assesses the prevalence of bulimia and bulimic behaviour in 14- to 16-year-old adolescents. Biological, sociodemographic and social correlates of these disorders are sought.

METHOD

A self-report questionnaire was administered to pupils of the 8th and 9th grades of secondary school in four regions of Finland. In total, 4453 girls and 4334 boys aged 14 to 16 years participated.

RESULTS

Bulimia was detected in 1.8% of girls and 0.3% of boys. Bulimic eating behaviour was reported by 14.4% of subjects. Sociodemographic variables were not associated with increased risk. Bulimia was associated with being bullied by peers and higher than average weight in both sexes.

CONCLUSION

Bulimia and bulimic eating behaviour appear to be more common than was previously thought in middle adolescence, and also among boys. Bulimia deserves more attention in younger age groups than main risk groups so far considered.