The prevalence and correlates of bulimia nervosa, binge-eating disorder, and anorexia nervosa: The Saudi National Mental Health Survey

Systematic review of the epidemiology of eating disorders in the Arab world

PURPOSE OF REVIEW

The Arab world is dealing with modernization and sociocultural changes both associated with eating disorders. The present review provides an update of 'Eating disorders in the Arab world: a literature review', which was published in 2020.

RECENT FINDINGS

There are 22 recent epidemiological studies on eating disorders in five different countries in the Arab world. A large-scale national mental health survey reported a 12-month eating disorder prevalence of 3.2% and an eating disorder lifetime prevalence of 6.1%. Binge-eating disorder was the most common eating disorder (12-month prevalence = 2.1%, lifetime prevalence = 2.6%), 1.6% was at high risk for binge-eating disorder. Overall, between 23.8 and 34.8% was at high risk for any eating disorder. Body-shape dissatisfaction, a high BMI and separated/widowed/single marital status were associated with eating disorder pathology.

SUMMARY

Although there is still a lack of studies compared to the western world, the number of epidemiological studies on eating disorders in the Arab world is growing and there is an increase in studies using appropriate assessment-tools and norms. It is recommended to offer specialized treatment and to implement preventive programs.

Obesity in Saudi Medical Students and Alignment with Eating Disorders: A Stratified Random Cross-Sectional Investigation

As a result of the increasing global incidence of obesity and related diseases, this study aims to investigate the prevalence of obesity and its correlation with eating disorder (ED) screening among medical students to develop effective prevention strategies and provide better outcomes for these students. We conducted a quantitative analytical cross-sectional study at the College of Medicine at King Saud University between November 2023 and February 2024. A stratified random sampling technique was utilized, enrolling a net number of 415 participants. Participants were asked several questions, including demographic information, weight, height, and past medical history, and were given a validated screening tool for EDs. Participants' mean age was 21.4 ± 1.67 years, and 17.6% were considered obese. The prevalence of positive screening for EDs was 27.7%; it was more common in females (p = 0.013) and those who earned more than 1000 SAR per month (p = 0.011). Female students also exhibited almost twice the odds of having EDs than males (AOR = 1.957; 95% CI = 1.218-3.146; p = 0.006). Furthermore, non-obese students showed decreased odds of having EDs compared with obese students by at least 48% (AOR = 0.517; 95% CI = 0.287-0.929; p = 0.027). Our study revealed a concerning prevalence of ED symptoms and obesity among medical students, suggesting profound implications. Therefore, multicenter studies are needed to assess the generalizability of the results and apply the findings to targeted national campaigns and interventions tailored specifically to medical students.

Anorexia nervosa and bulimia nervosa: a Mendelian randomization study of gut microbiota

Background

Anorexia nervosa (AN) and bulimia nervosa (BN) poses a significant challenge to global public health. Despite extensive research, conclusive evidence regarding the association between gut microbes and the risk of AN and BN remains elusive. Mendelian randomization (MR) methods offer a promising avenue for elucidating potential causal relationships.

Materials and methods

Genome-wide association studies (GWAS) datasets of AN and BN were retrieved from the OpenGWAS database for analysis. Independent single nucleotide polymorphisms closely associated with 196 gut bacterial taxa from the MiBioGen consortium were identified as instrumental variables. MR analysis was conducted utilizing R software, with outlier exclusion performed using the MR-PRESSO method. Causal effect estimation was undertaken employing four methods, including Inverse variance weighted. Sensitivity analysis, heterogeneity analysis, horizontal multivariate analysis, and assessment of causal directionality were carried out to assess the robustness of the findings.

Results

A total of 196 bacterial taxa spanning six taxonomic levels were subjected to analysis. Nine taxa demonstrating potential causal relationships with AN were identified. Among these, five taxa, including Peptostreptococcaceae, were implicated as exerting a causal effect on AN risk, while four taxa, including Gammaproteobacteria, were associated with a reduced risk of AN. Similarly, nine taxa exhibiting potential causal relationships with BN were identified. Of these, six taxa, including Clostridiales, were identified as risk factors for increased BN risk, while three taxa, including Oxalobacteraceae, were deemed protective factors. Lachnospiraceae emerged as a common influence on both AN and BN, albeit with opposing effects. No evidence of heterogeneity or horizontal pleiotropy was detected for significant estimates.

Conclusion

Through MR analysis, we revealed the potential causal role of 18 intestinal bacterial taxa in AN and BN, including Lachnospiraceae. It provides new insights into the mechanistic basis and intervention targets of gut microbiota-mediated AN and BN.

[Anorexia nervosa, a familiar and complex pathology]

Anorexia nervosa affects people of all ages, and has the highest mortality rate of all psychiatric disorders, following medical complications inherent in the disease or suicide. Early and appropriate treatment is crucial to prevent the risk of chronic disease, which may affect one in two anorexics. Severe undernutrition linked to a complex psychopathology calls for the necessary theoretical and clinical knowledge on the part of the caregiver, applied to the dynamics of care, ideally conceived in a transdisciplinary way and involving nursing teams.

The Saudi-Arabic adaptation of the Body Shape Questionnaire (BSQ34): Psychometrics and norms of the full version and the short version (BSQ8C)

INTRODUCTION

Saudi Arabia experiences elevated levels of body-shape dissatisfaction which might be related to the increased thin ideal. Studies on body-shape dissatisfaction are scarce, mainly because adapted assessment tools are unavailable. This study describes the Saudi-Arabic adaptation of the Body Shape Questionnaire (BSQ34), preliminary examines the psychometric properties and provides normative data.

METHODS

The BSQ34 was administered in a convenience community sample (N = 867) between April 2017 and May 2018. Receiver-operating-characteristic curve analysis was used to establish discriminant validity, in a subsample (N = 602) in which the Eating Disorder Examination-Shape concern, was administered, the factor structure investigated with confirmatory-factor analyses and T-scores and percentile scores were determined.

RESULTS

The BSQ34 discriminated well between low and high levels of body-shape dissatisfaction (area-under-the-curve value = 0.93), had high internal consistency and a unidimensional factor structure, and 23.9% appeared at risk for body-shape dissatisfaction. Analyses were repeated for the shortened BSQ8C, which yielded similar results.

DISCUSSION

The results indicated that the BSQ34 and BSQ8C appeared suitable measurement tools to screen for body-shape dissatisfaction in a Saudi convenience community sample, mainly comprised young, unmarried, and highly educated women. The BSQ34 supplies more information on the type of concerns respondents have, which is worthwhile when the measure is used in a clinical setting; the BSQ8C is recommended as a short screener. As body-shape dissatisfaction is viewed as a risk factor for the development of eating disorder symptoms, screening for body-shape dissatisfaction with reliable tools is important to detect individuals at risk for eating disorder symptoms and may suggest subsequent preventive steps.