Momentary physiological indices related to eating disorders: A systematic and methodological review.

Eating disorders (ED) are serious psychiatric illnesses, with no everyday support to intervene on the high rates of relapse. Understanding physiological indices that can be measured by wearable sensor technologies may provide new momentary interventions for individuals with ED. This systematic review, searching large databases, synthesises studies investigating peripheral physiological (PP) indices commonly included in wearable wristbands (heart rate [HR], heart rate variability [HRV], electrodermal activity [EDA], peripheral skin temperature [PST], and acceleration) in ED. Inclusion criteria included: (a) full peer-reviewed empirical articles in English; (b) human participants with active ED; and (c) containing one of five wearable physiological measures. Kmet risk of bias was assessed. Ninety-four studies were included (Anorexia nervosa [AN; N = 4418], bulimia nervosa [BN; N = 916], binge eating disorder [BED; N = 1604], other specified feeding and eating disorders [OSFED; N = 424], and transdiagnostic [N = 47]). Participants with AN displayed lower HR and EDA and higher HRV compared to healthy individuals. Those with BN showed higher HRV, and lower EDA and PST compared to healthy individuals. Other ED and Transdiagnostic samples showed mixed results. PP differences are indicated through various assessments in ED, which may suggest diagnostic associations, although more studies are needed to validate observed patterns. Results suggest important therapeutic potential for PP in ED, and larger studies including diverse participants and diagnostic groups are needed to fully uncover their role in ED.

Comparisons between atypical anorexia nervosa and anorexia nervosa: Psychological and comorbidity patterns.

OBJECTIVE: Literature comparing "atypical" anorexia nervosa (atypical AN) and anorexia nervosa (AN) suggests these diagnoses share significant similarities in eating disorder (ED) pathology and psychiatric comorbidities. This study evaluated potential differences in ED pathology, psychiatric comorbidity, associated mechanisms (i.e., ED fears and perfectionism), and demographic factors (i.e., ethnicity and age) between individuals with atypical AN and AN. METHOD: Data from seven protocols were combined for a total 464 individuals diagnosed with atypical AN (n = 215) or AN (n = 249). Between-group differences in ED severity and behaviors, psychiatric comorbidities, ED fears, perfectionism, and demographic factors were assessed using t-tests, Wilcoxon rank-sum tests, and Fisher's exact test. RESULTS: Participants with atypical AN reported higher levels of overvaluation of weight and shape than those with AN. Participants with AN scored higher on food-related fears (anxiety about eating, food avoidance behaviors, and feared concerns) and fears of social eating, as well as obsessive-compulsive symptoms. Participants with AN were more likely to identify as Asian or Pacific Islander. No other statistically significant differences were found between groups for overall ED severity, ED behaviors, psychiatric comorbidities, general ED fears, perfectionism, or demographic factors. DISCUSSION: Overall, results support previous literature indicating limited differences between individuals with atypical AN and AN, though individuals with atypical AN reported more overvaluation of weight and shape and those with AN reported higher food and social eating fears and obsessive-compulsive symptoms. Relatively few overall differences between atypical AN and AN highlight the importance of exploring dimensional conceptualizations of AN as an alternative to the current categorical conceptualization. PUBLIC SIGNIFICANCE: This study assessed differences among individuals with atypical anorexia nervosa and anorexia nervosa in eating disorder severity and behaviors, comorbid psychiatric diagnoses, associated mechanisms, and demographic factors. Few differences emerged, though participants with atypical anorexia nervosa reported more overvaluation of weight and shape, while those with anorexia nervosa reported more food and social eating fears and higher obsessive-compulsive symptoms. Results support exploration of these diagnoses as a spectrum disorder.

Exploring Sociocultural Influences Affecting Body Image in Survivors of Childhood Sexual Assault.

This phenomenological study explored the lived experiences of survivors of childhood sexual assault, their meaning making process of the assault, and how messages from their sociocultural environment affected their relationship with, and perception of, their bodies. Utilizing a social constructivist framework, the research team interviewed eleven (n = 11) participants from a variety of backgrounds who were gender assigned female at birth and had survived childhood sexual assault (CSA). Four major themes emerged from the narratives collected. These include sociocultural impacts which included four subthemes: family relationships, peer relationships, societal and environmental influences, and cultural and ethnic influences; meaning making of the critical event, i.e., childhood sexual assault; self-perception of their bodies; internal processes that have shaped their perceptions and meaning making, i.e., thoughts, feelings, and behaviors. Findings indicate major influence of sociocultural factors in shaping participant's internal processes as survivors of CSA, meaning making, and subsequently self-perceptions of, and relationship with, their bodies. We discuss CSA and body image keeping the intersectionality of the individual, their experiences, and the impact of sociocultural contexts on that intersectionality.

Competing for perfection: A scoping review evaluating relationships between competitiveness and eating disorders or disordered eating behaviours.

OBJECTIVE: Eating disorders (EDs) impact multiple domains in a person's life including interpersonal interactions. Although a considerable amount of literature has evaluated social comparison and ED pathology, less has focussed on the influence of competitiveness on eating behaviours within ED and community samples. To address this, a systematic scoping review was conducted to evaluate current knowledge on this topic. METHOD: PRISMA guidelines for scoping reviews were utilised to identify relevant articles in three databases without limits to date or publication type. RESULTS: A total of 2952 articles were identified. After removing duplicates and books, 1782 articles were evaluated against inclusion criteria, and 91 articles were included. Results were synthesised under six differing conceptualisations of competitiveness: competition in pro-eating disorder communities (n = 28), general personality competitiveness (n = 20), sexual competition hypothesis (n = 18), interpersonal competitiveness with peers (n = 17), familial competitiveness (n = 8) and competitiveness to avoid inferiority (n = 5). CONCLUSION: Varying conceptualisations of competitiveness were identified within the ED literature, and preliminary evidence suggests competitiveness may be associated with ED pathology in ED and community samples, although results were not uniform. Future research is needed to clarify these relationships and to identify possible clinical implications.