BackgroundEvidence for an increase in the prevalence of eating disorders is inconsistent. Our aim was to determine change in the population point prevalence of eating disorder behaviors over a 10-year period.Methodology/Principal FindingsEating disorder behaviors were assessed in consecutive general population surveys of men and women conducted in 1995 (n = 3001, 72% respondents) and 2005 (n = 3047, 63.1% respondents). Participants were randomly sampled from households in rural and metropolitan South Australia. There was a significant (all p<0.01) and over two-fold increase in the prevalence of binge eating, purging (self-induced vomiting and/or laxative or diuretic misuse) and strict dieting or fasting for weight or shape control among both genders. The most common diagnosis in 2005 was either binge eating disorder or other “eating disorders not otherwise specified” (EDNOS; n = 119, 4.2%).Conclusions/SignificanceIn this population sample the point prevalence of eating disorder behaviors increased over the past decade. Cases of anorexia nervosa and bulimia nervosa, as currently defined, remain uncommon.

Attitudes and beliefs concerning the nature and treatment of bulimia nervosa (BN) were compared among young adult women at low risk of an eating disorder (n = 332), at high risk (n = 83), or already showing symptoms (n = 94). Participants completed a self-report questionnaire that included a measure of eating disorder symptoms. A vignette of a fictional person suffering from BN was presented, followed by a series of questions addressing the nature and treatment of the problem described. High-risk and symptomatic participants were more likely than low-risk participants to report that they would not approach anyone for advice or help, were they to have BN or a similar problem, because they would not want anyone to know. Symptomatic participants were more likely to believe that someone with BN would be discriminated against, more likely to consider bulimic behaviors to be acceptable, and more likely to view BN as being common among women in the community, than low-risk participants, participants in the high-risk group being intermediate on each of these questions. The findings suggest that the attitudes and beliefs of individuals with eating disorder symptoms differ systematically from those of individuals at high risk, but who do not yet have symptoms, and from those at low risk. They also indicate specific attitudes and beliefs that may need to be addressed in prevention and early intervention programs. The potential benefits of assessing individuals' attitudes and beliefs concerning the nature and treatment of eating-disordered behaviour and tailoring program content accordingly may be worthy of investigation.

Comorbid obesity and ED behaviors are an increasing problem in our society. Prevention and treatments efforts for obesity and EDs must consider and address this increasing comorbidity.

Objective: To examine levels of eating disorder behaviours and cognitions of young women with obesity in the Australian Capital Territory, Australia and assess the impact upon psychological status. Design: General population cross-sectional survey. Subjects: A total of 4891 young women from the community aged 18-42 years, of which 630 were in the obese weight range. Measurements: Body mass index (BMI), eating disorder psychopathology (eating disorder examination questionnaire), and psychological distress (K-10). Results: Women with obesity had significantly higher levels of dietary restraint, eating concern, weight concern, shape concern, binge eating, misuse of diuretics, use of diet pills and fasting compared to other women in the community. These eating disorder cognitions and behaviours were associated with increased levels of psychological distress. In women with obesity, eating concern, weight concern, shape concern, dietary restraint and decreased age predicted psychological distress in a multivariate model. Among other women in the community, behaviours such as laxative misuse, 'hard' exercise and subjective bulimic episodes also contributed to the model predicting psychological distress. Conclusion: As disordered eating psychopathology is high in young obese women and negatively impacts upon psychological status, obesity prevention and treatment should consider eating disorder psychopathology and mental health outcomes.

Objective:The objective was to test the hypothesis that, in women, the association between obesity and impairment in psychosocial functioning is mediated by levels of weight and shape concerns and/or binge-eating frequency. Research Methods and Procedures: Self-report measures of eating disorder psychopathology, mental health functioning, subjective quality of life in the psychological and social domains, and days "out-of-role" associated with any (physical or mental) health problem, were completed by a community sample of women classified as obese (BMI Ն30 kg/m 2 , n ϭ 639) or non-obese (BMI Ͻ30 kg/m 2 , n ϭ 4253). For each of the dependent measures, regression models were used to test the hypothesis of mediation by comparing the strength of the relationship between independent and dependent variables with and without inclusion of the putative mediator in the regression model. Results:On each measure, the conditions for perfect mediation were satisfied when weight or shape concerns acted as the putative mediator, indicating that there was no association between obesity and functional impairment after controlling for weight or shape concerns. In contrast, associations between obesity and impairment in psychosocial functioning remained highly significant when binge-eating frequency was the putative mediator. Discussion: The findings suggest that in women, weight and shape concerns are an important mediator of the relationship between obesity and impairment in psychosocial functioning, whereas binge eating may not be of primary importance. A greater focus on body acceptance in obesity treatment may be indicated.