Assessment of anorexia nervosa: an overview of universal issues and contextual challenges

Empirical Investigation of Different Factor Structures for the Eating Disorder Examination-Questionnaire in Adult Women With Anorexia Nervosa

The Eating Disorder Examination-Questionnaire (EDE-Q) is a widely used self-report measure of eating pathology. Despite widespread use, investigations of its factor structure have proved inconclusive and rarely supported the "original" interpretation. The current study evaluates several proposed factor solutions of the EDE-Q using latent variable analysis in a sample of adult women with anorexia nervosa (AN). A total of 804 patients from a specialist treatment center in the United States participated in the study. Confirmatory factor analysis was conducted on 22 EDE-Q items assessing attitudinal features of eating pathology. Findings suggested that three full-item versions (none of which was the "original" interpretation) fit the data adequately, with a brief, seven-item version showing excellent fit. The study is one of the first to examine this within a sample of women with AN and provides an empirical foundation for how best to use the EDE-Q among clinical and research participants with AN. Findings suggest that the "original" factor structure lacks structural validity in women with AN. Its use should generally be discouraged, and future work on screening and treatment outcomes might consider the EDE-Q7.

Inferring causal cell types of human diseases and risk variants from candidate regulatory elements

The heritability of human diseases is extremely enriched in candidate regulatory elements (cRE) from disease-relevant cell types. Critical next steps are to infer which and how many cell types are truly causal for a disease (after accounting for co-regulation across cell types), and to understand how individual variants impact disease risk through single or multiple causal cell types. Here, we propose CT-FM and CT-FM-SNP, two methods that leverage cell-type-specific cREs to fine-map causal cell types for a trait and for its candidate causal variants, respectively. We applied CT-FM to 63 GWAS summary statistics (average N = 417K) using nearly one thousand cRE annotations, primarily coming from ENCODE4. CT-FM inferred 81 causal cell types with corresponding SNP-annotations explaining a high fraction of trait SNP-heritability (~2/3 of the SNP-heritability explained by existing cREs), identified 16 traits with multiple causal cell types, highlighted cell-disease relationships consistent with known biology, and uncovered previously unexplored cellular mechanisms in psychiatric and immune-related diseases. Finally, we applied CT-FM-SNP to 39 UK Biobank traits and predicted high confidence causal cell types for 2,798 candidate causal non-coding SNPs. Our results suggest that most SNPs impact a phenotype through a single cell type, and that pleiotropic SNPs target different cell types depending on the phenotype context. Altogether, CT-FM and CT-FM-SNP shed light on how genetic variants act collectively and individually at the cellular level to impact disease risk.

A Tale of Childhood Loss, Conditional Acceptance and a Fear of Abandonment: A Qualitative Study Taking a Narrative Approach to Eating Disorders

Eating disorders (EDs) are serious mental health illnesses, yet there is a need to better understand the illness experience to improve treatment outcomes. Qualitative research, and narrative approaches in particular, can elicit life stories that allow for the whole illness journey to be explored. This study aimed to explore the experiences of women with a history of an ED, identifying the life events they perceived were relevant to the onset of their ED through to recovery. Interviews were conducted with 18 women with lived experience of an ED. Through structural narrative analysis, an overarching storyline of childhood loss contributing to a belief of conditional acceptance, fear of abandonment and struggle to seek emotional support due to the fear of being a burden was identified. Negative experiences with the health sector were common. These findings have implications for the way medical professionals respond to help seeking and deliver treatment.

Associations between bone mineral density, body composition and amenorrhoea in females with eating disorders: a systematic review and meta-analysis

BACKGROUND

Lower bone mineral density (BMD) increases the risk of osteoporosis in individuals with eating disorders (EDs), particularly women with anorexia nervosa (AN), making them susceptible to pain and fractures throughout adulthood. In AN, low weight, hypothalamic amenorrhoea, and longer illness duration are established risk factors for low BMD, and in people with other EDs a history of AN seems to be an important risk factor for low BMD.

PURPOSE

To conduct a systematic review and meta-analysis of BMD in individuals with EDs, including AN, bulimia nervosa (BN), binge-eating disorder (BED) and other specified feeding or eating disorders (OSFED) compared to healthy controls (HC).

METHODS

Following PRISMA guidelines, electronic databases were reviewed and supplemented with a literature search until 2/2022 of publications measuring BMD (dual-energy X-ray absorptiometry or dual photon absorptiometry) in females with any current ED diagnosis and a HC group. Primary outcomes were spine, hip, femur and total body BMD. Explanatory variables were fat mass, lean mass and ED clinical characteristics (age, illness duration, body mass index (BMI), amenorrhoea occurrence and duration, and oral contraceptives use).

RESULTS

Forty-three studies were identified (N = 4163 women, mean age 23.4 years, min: 14.0, max: 37.4). No study with individuals with BED met the inclusion criteria. BMD in individuals with AN (total body, spine, hip, and femur), with BN (total body and spine) and with OSFED (spine) was lower than in HC. Meta-regression analyses of women with any ED (AN, BN or OSFED) (N = 2058) showed low BMI, low fat mass, low lean mass and being amenorrhoeic significantly associated with lower total body and spine BMD. In AN, only low fat mass was significantly associated with low total body BMD.

CONCLUSION

Predictors of low BMD were low BMI, low fat mass, low lean mass and amenorrhoea, but not age or illness duration. In people with EDs, body composition measurement and menstrual status, in addition to BMI, are likely to provide a more accurate assessment of individual risk to low BMD and osteoporosis.

Practitioner eating disorder detection: The influence of health mindset, thin-ideal internalization, orthorexia and gender role

AIMS

The current study sought to determine what factors inhibited psychologists, naturopaths and fitness instructors from detecting an eating disorder (ED), and the discipline differences across these factors.

METHODS

Participants of the online study were 115 health practitioners who consisted of 35 psychologists, 50 naturopathic and 30 fitness practitioners. A vignette describing a female experiencing a sub-threshold bulimic variant without purging was presented alongside ED mental health literacy items such as assessing one's ability to detect a problem. Additional items examined factors that may inhibit detection, including practitioners' level of: thin-ideal internalization, orthorexia, health or fitness mindset (a newly developed scale measuring health and fitness obsessiveness) and gender role identity.

RESULTS

A significant number of naturopaths and fitness instructors (20% and 33.3%, respectively) were found to have elevated orthorexia scores. Similarly, psychologists had the greatest tendency to internalize the thin-ideal (M = 3.60), which was comparable to levels seen in recent research for 20- to 21-year-old females with EDs. The two largest factors inhibiting ED detection were the strength of a health mindset and gender role identity. Practitioners who had higher health mindset scores or who associated with gender identities higher in masculinity traits (ie, either androgynous or masculine gender roles) were more likely to miss detecting an ED.

CONCLUSIONS

While many present ED studies focus upon assessing and changing client cognitions, this study emphasizes the need for further research regarding training interventions to address practitioner cognitions and gender role biases, which may in turn improve ED detection.

Potential bioelectrical impedance analysis (BIA) parameters in prediction muscle strength in women with anorexia nervosa

OBJECTIVES

The role of physical activity in anorexia nervosa (AN) treatment has been investigated. Muscle strength (MS) reflects physical condition and can predict AN patients' response to this novel treatment approach. This study was intended to find bioelectrical impedance analysis (BIA) parameters that predict AN patients' MS.

METHODS

The study included 42 AN patients and 42 healthy ones in the control group. BIA parameters that predict MS were assessed by dividing AN patients into groups by their hand grip strength test score (higher/lower than 22.5 kg).

RESULTS

The highest accuracy for distinguishing AN subjects from the control group was achieved by cell membrane capacitance (AUC = 0.916), impedance at 200 kHz and 5 kHz ratio (AUC = 0.924), phase angle (PA) 5 kHz (AUC = 0.906) and PA 50 kHz (AUC = 0.919). The low MS group had significantly lower values of PA 50 kHz (mean: 4.03 ± 0.80° vs. 4.58 ± 0.65°; p = 0.032) and fat-free mass index (mean: 12.22 ± 1.41 kg/m² vs. 13.14 ± 0.94 kg/m²; p = 0.026). In the univariate model, PA 50 kHz ≥4.037° was associated with the lowest chance of muscle weakness (OR = 0.230; p = 0.005). In the multivariate analysis, PA 50 kHz was the only significant factor of MS (OR = 0.01; p = 0.027).

CONCLUSIONS

PA 50 kHz is the best BIA parameter to predict MS in AN patients. It could be useful for assessment before physical activity treatment application.

Evaluating the effectiveness of an evidence-based online training program for health professionals in eating disorders

BACKGROUND

Early detection and treatment are essential to ensuring the best possible health outcomes for people with eating disorders (EDs). However, low diagnostic accuracy and a lack of specific ED training are common workforce challenges in Australia and internationally. Online learning provides a potential solution in facilitating the access to evidence-based training programs. The InsideOut Institute has developed the first online clinical training program in EDs to assist with educating health professionals in the identification, assessment, and management of EDs. The aim of the study is to evaluate the effectiveness of the online training program, The Essentials, in mitigating barriers to health professionals treating patients with EDs.

METHODS

Pre and post training questionnaires assessed participants' attitudes, knowledge, and skills in relation to treating people with EDs. Demographic and work-related information (gender, discipline, work setting, practice length and remoteness) and participants' ratings of the online learning experience and satisfaction on completion were collected. The Wilcoxon signed rank test was applied to test for changes in learning outcomes before and after completion of the program. A multivariate linear regression model was estimated for each of the learning outcomes with personal and work-related characteristics as covariates.

RESULTS

Among 1813 health professionals who registered for The Essentials program between 1 October 2013 and 31 July 2018, 1160 completed at least 80% of the five learning modules. There were significant improvements in confidence, knowledge, skills to treat EDs and a reduction in stigmatised beliefs among the 480 participants who completed both pre and post assessments. Results from the regression models suggest that psychologists, dieticians, and those working in rural areas were more willing to treat EDs after completing the program. Additionally, those working in hospitals and regional or rural areas experienced the largest improvement in confidence for treating patients with EDs.

CONCLUSIONS

The Essentials program represents a new and effective way of meeting the educational needs of partaking health professionals working with ED patients. Greater investment in the development and testing of evidence-based online training programs for EDs may help to address some of the considerable workforce development challenges in EDs.

Eating disorder mental health literacy: What do psychologists, naturopaths, and fitness instructors know?

At present, there are no known studies investigating the eating disorder mental health literacy (ED-MHL) of common frontline health providers such as psychologists, naturopaths, and fitness instructors. Little research also exists around practitioner knowledge for the spectrum of eating disorders. The current study sought to fill these research gaps and comprised 115 health practitioners who completed an online survey. A fictional vignette describing a female (Sarah) experiencing a subthreshold bulimic variant without purging was presented alongside common ED-MHL items. Almost 4 in 10 psychologists, 7 in 10 natural therapists, and 8 in 10 fitness instructors failed to detect a general eating disorder, with the latter two groups more likely to believe the problem was a self-esteem issue. Perceived helpfulness of people and interventions varied from best practice clinical guidelines, with physical/medical risk management not prioritized, pharmacotherapy viewed poorly, and doctors seen as one of the least helpful people. Although Sarah's problem was seen as severe and highly common (which may speak to the volume of undetected eating disorders), alarmingly 36.7% of fitness instructors viewed her predicament as desirable given weight lost. This novel study highlights the need for specific training interventions to improve health practitioners' ED-MHL, particularly around atypical eating disorder presentations, which may facilitate earlier detection and help-seeking for evidence-based interventions rather than expenditure on unhelpful or even harmful treatments, leading to improved community health and lives saved.

Neurobiochemical and psychological factors influencing the eating behaviors and attitudes in anorexia nervosa

The aim of this study was to determine the characteristic features which contribute to inappropriate eating attitudes in people suffering from anorexia nervosa, based on an analysis of recent data. Factors influencing these attitudes have a genetic, neurobiological, biochemical, affective-motivational, cognitive, and behavioral background. Another important issue addressed in the paper is a description of the mechanism leading to continuous dietary restrictions. The altered activity of neurotransmitters modulating patients’ moods after the consumption of food and a disturbed responsiveness to enterohormones enhance affective-motivational and cognitive aspects which, in turn, impede the improvement of eating behaviors. An understanding of the mechanisms behind the factors affecting the maintenance of inappropriate eating attitudes may contribute to greater effectiveness in the treatment of anorexia nervosa.

Empirically derived subtypes of full and subthreshold anorexia nervosa in adolescent females: understanding general psychopathology and treatment implications

The aim of this study was to derive clinically relevant subtypes of anorexia nervosa (AN) and subthreshold AN using general psychopathology variables and to determine how they differ on eating pathology. Participants were 39 adolescent females aged 13 to 18 years, diagnosed with AN or subthreshold AN. Cluster analysis revealed two subtypes that differed significantly in eating pathology. Cluster 1 patients were typically underweight with no clinical elevations on eating or psychopathology measures. Cluster 2 patients were mostly of healthy weight with greater eating and psychological problems. Findings allow clinicians to classify and understand AN beyond diagnostic criteria, and implement interventions that consider presentation beyond eating pathology.