Eating behaviors最新文献

Reinforcement Sensitivity Theory (RST) provides a neurobiological personality framework for understanding approach and avoidance behavioural patterns. Recent research suggests an association between RST personality traits (reward interest and behavioural inhibition system [BIS]) and women's body image and eating behaviours. The current study aimed to extend this research by testing for indirect relationships between reward interest and BIS and eating disorder symptoms, as mediated through thin ideal internalisation. Adult female participants (N = 354, M = 22.06 years of age, SD = 6.78) completed self-report measures of reward interest, BIS, thin ideal internalisation, and eating disorder symptoms (i.e., restraint, eating concerns, weight and shape concerns). Indirect relationships were tested using bootstrapped mediation analyses. Results showed thin ideal internalisation mediated the pathways between the BIS and restraint, eating concern, and weight and shape concerns. Reward interest was not associated with thin ideal internalisation, or with eating disorder symptoms. Although the application of RST to women's body image is an emerging research area, these novel findings suggest BIS trait sensitivity may increase women's risk of body image concerns and restricted eating, via increased levels of thin ideal internalisation. Overall, these findings provide preliminary support for inclusion of individual differences in BIS sensitivity in risk factor models of body image and eating disturbances. Future research should aim to replicate these findings in more diverse samples, using longitudinal designs.

Introduction: In the context of understanding children's food refusal behaviors, such as food fussiness and food neophobia, research has predominantly focused on the role of parental feeding strategies. However, little is known about which general family context variables add to the understanding of children's food refusal behaviors. The purpose of this study was to examine the relation between 1) parents' own use of maladaptive emotion regulation strategies when they are anxious, 2) parents' reactions towards their children's emotions in stressful situations, and 3) parenting styles on the one hand, and children's food refusal behaviors on the other. Methods: Mothers and fathers (N = 157) of young children (M = 4.64, SD = 1.7) completed a series of self- and parent-report questionnaires. Results: The model examining the role of parenting styles was found to be significantly related to food refusal behaviors in children. More specifically, the current findings demonstrate that higher levels of a coercive parenting style were associated with higher levels of both food fussiness and food neophobia in children. Furthermore, higher levels of a chaotic parenting styles were associated with higher levels of food neophobia in children. The models examining parents' maladjusted emotion regulation strategies when anxious and parents' reactions towards their children's emotions during stressful situations were not found to be significant. Conclusions: Factors related to the parenting style appear to be important for understanding food refusal behaviors in children. Replication of the findings using longitudinal and observational designs is needed.

Introduction

Compulsive exercise is a transdiagnostic feature of eating disorders which adversely affects aspects of recovery, such as length of hospitalisation, risk of a chronic outcome, and risk of relapse. CompuLsive Exercise Activity TheraPy (LEAP) aims to reduce compulsive exercise through a cognitive behavioural approach. This study aims to investigate the effect of LEAP on compulsive exercise behaviour using subscales of the Compulsive Exercise Test (CET), a measure of exercise in individuals with eating disorders. Predictive validity of the CET's subscales and its ability to predict eating psychopathology are investigated.

Method

This study used data from a randomized controlled trial of LEAP (1). Linear mixed modelling was used to investigate the effect of LEAP on compulsive exercise behaviour, and the predictive ability of CET subscales on various outcomes. The CET was compared to other exercise measures to assess its superiority in predicting eating psychopathology.

Results

LEAP was superior in reducing the scores of the CET's Avoidance and Rule Driven Behaviour and Exercise Rigidity subscales. All subscales made a contribution to the respective models. The CET was superior to other measures in predicting eating pathology.

Conclusion

The results lend credibility to LEAP's ability to reduce core parts of compulsive exercise. The CET has been found to target important aspects of compulsive exercise behaviour, and has was superior to other exercise measures in predicting eating psychopathology.

Polycystic ovarian syndrome (PCOS) is a reproductive disorder driven by insulin resistance. Insulin resistance may increase weight gain and increase the rewarding intake of ultra-processed foods (UPFs). Individuals with PCOS may be more susceptible to the reinforcing properties of UPFs, increasing the risk to consume UPFs in addictive-like ways, operationalized by food addiction (FA). Additionally, hormonal birth control, commonly prescribed to women with PCOS, are found to increase food cravings and overeating. This study examined the relationships between PCOS status, FA, and hormonal birth control use. The study sample (N = 365, assigned female at birth) was drawn from Amazon Mechanical Turk, with half of the sample (n = 181) reporting having PCOS and the other half not (n = 184). Participants answered questions about women's reproductive health (i.e., PCOS, hormonal birth control use) and completed the modified Yale Food Addiction Scale 2.0 (mYFAS 2.0). A chi-square test found that 51.9 % of participants with PCOS (M = 6.23, SD = 3.82) met diagnostic criteria for FA (assessed by the mYFAS 2.0) compared to 16.8 % of participants without PCOS (M = 2.47, SD = 3.39). A hierarchical linear regression found independent main effects of PCOS status (β = 0.40, t(352) = 8.61, p < .001) and hormonal birth control use (β = 0.16, t(351) = 3.59, p < .001), to be associated with higher mYFAS symptom count scores. No differences were found between the types of hormonal birth control participants reported taking. The finding suggests that FA is an overlooked, understudied psychological condition impacting these individuals in weight loss treatments. Future studies are needed to understand the relationship between FA and PCOS in clinical samples.

Introduction

Compensatory eating disorder (CED) is a newly proposed ‘other specified feeding and eating disorder’ characterized by recurrent non-purging compensatory behaviors (e.g., compulsive exercise and/or food restriction), overvaluation of weight/shape, the absence of objective binge-eating episodes, and the absence of low weight or recent significant weight loss. This study compared individuals with CED to individuals with anorexia nervosa (AN), bulimia nervosa (BN), or binge-eating disorder (BED) on measures of psychiatric impairment, eating-disorder (ED) symptomatology, and comorbid internalizing disorders.

Method

Adults (N = 187) with CED, AN, BN, or BED completed measures of ED-related-psychiatric impairment and ED symptomatology. Structured clinical interviews were administered to assess ED and internalizing-disorder diagnoses.

Results

Linear regression models were fit to compare the CED group to full-threshold ED groups on psychiatric impairment, body dissatisfaction, cognitive restraint, negative attitudes towards obesity, and weight suppression. A chi-square difference test examined group differences on internalizing-disorder prevalence. Results indicated that the CED group had high levels of psychiatric impairment, yet psychiatric impairment was significantly lower in the CED group compared to other groups. The AN group had significantly lower body dissatisfaction than the CED group. Individuals with CED had similar cognitive restraint, negative attitudes towards obesity, internalizing psychopathology, and weight suppression compared to other ED groups.

Conclusion

Individuals with CED had substantial ED psychopathology and internalizing-disorder prevalence, comparable to individuals with full-threshold EDs. Individuals with CED had high levels of psychiatric impairment, but their impairment was lower than individuals with full-threshold EDs. Our results indicate that CED is a clinically significant disorder.

Adolescents and young adults (AYA) with anorexia nervosa (AN) frequently have co-occurring anxiety and depression, which can negatively impact prognosis. To inform treatment of co-occurring anxiety and depression, we assessed the association of nutritional intake and hunger/stress hormones on anxiety and depression using a six-month longitudinal study of 50 AYA females receiving care for AN. At baseline and six months, we measured anxiety (Spielberger State/Trait Anxiety Inventory [STAI]), depression (Beck Depression Inventory [BDI]), body mass index (BMI), 3-day dietary intake (total calories and proportion of fat, carbohydrate, protein), and serum cortisol, leptin, and adiponectin. We performed mixed effects linear regression analyses, adjusting for age, duration of AN, and percentage of median BMI (%mBMI). At baseline, median age was 16.3 (interquartile range [IQR] = 2.5) years, duration of AN was 6 (IQR = 8.8) months and %mBMI was 87.2 (IQR = 10.5)%. Fifty-six percent had clinically significant anxiety; 30 % had depression. Over 6 months, participants had significant improvements in %mBMI (+2.2[IQR = 9.2]%, p < .01), STAI (−9.0[IQR = 25.0], p < .01), and BDI (−5.0[IQR = 13.8], p < .01) scores. Participants with larger improvements in caloric intake had greater improvements in STAI (p = .03) and BDI scores (p = .04). Larger improvement in BDI was significantly associated with increased fat intake (p < .01), but not carbohydrate or protein intake. Change in STAI was not associated with changes in fat, carbohydrate, or protein intake. Changes in STAI or BDI scores were not associated with changes in cortisol, leptin, or adiponectin. Increased caloric intake may augment treatment of co-occurring anxiety and depression, and increased fat intake may improve depression for AYA with AN.

Metabolic syndrome (MetS), a precursor to cardiovascular disease and type II diabetes, is rapidly increasing in young adults. Accordingly, earlier interventions aimed at combating the onset of MetS in young adults are required. However, current behavioral interventions have failed to consider the eating behaviors that precede disease development, likely contributing to the consistently high failure rates of these interventions. The purpose of this cross-sectional study was to evaluate the associations between eating behaviors and MetS severity (MetS_index) in a sample of young adults. A sample of 104 (non-Hispanic White: 45; non-Hispanic Black: 49; Hispanic White: 5; Asian: 5) young adult (age: 23.1 ± 4.4) males and females (F:61, M:43) completed anthropometric, blood pressure, blood glucose, and blood lipid assessments; each of which were used to calculate a continuous MetS_index score. Participants also completed the revised version of the 18-item Three-factor Eating Questionnaire to measure emotional eating (EmE), uncontrolled eating (UE), and cognitive restraint (CR). EmE was positively associated with MetS_index for young adult females (p = 0.033) and non-Hispanic Black participants (p = 0.050), but not male (p = 0.506) or non-Hispanic White participants (p = 0.558). Additionally, MetS_index was greater in the highest EmE tertile compared to the lowest EmE tertile for the total sample (p = 0.037) and young adult females (p = 0.015). UE and CR were not associated with MetS_index. These data suggest a potential link between EmE and MetS severity in young adults, and that behavioral interventions aimed at MetS prevention should focus on treating the underlying EmE behaviors common in young adults, particularly for young female and Black adults at the greatest risk.

Despite the theoretical connection between media literacy and body dissatisfaction, empirical findings about their relationship are decidedly mixed. There is not a clear explanation for these discrepancies. The present study aimed to 1) compare the attitudes young adult women with those of a reference group of adolescents to examine whether similar values were observed despite differences in age group and racial/ethnic identity, 2) to examine the relationships between media literacy and body dissatisfaction using recommended measures of media literacy. Racially diverse female undergraduate students (N = 152, M_age = 21.62) completed the Media Attitudes Questionnaire, the Critical Thinking about Media Measure, and the Body Shape Questionnaire online. Young adult women endorsed greater critical thinking about media messages and greater skepticism towards the similarity of media messages than adolescents. Additionally, greater skepticism towards the desirability and realism of media messages was associated with lower body dissatisfaction while greater critical thinking about media messages was found to be positively related to greater body dissatisfaction. It is possible that greater critical thinking within the context of media literacy cannot occur without increased attention towards or time spent thinking about media messages. Findings suggest that enhancing critical thinking about the media may not be the main mechanism of change for effective media literacy interventions. These findings underscore the complexities that exist within the relationships between media literacy and body dissatisfaction and highlight the continued need for research in this area.

Introduction

Inappropriate compensatory behaviors (ICBs), including purging, restricting, and excessive exercising, are key symptoms of several eating disorders (EDs). Studies have found positive associations between trauma and ICBs, although few studies have explored mechanisms that may explain these relationships. Emotion dysregulation has been posited as a mechanism that explains associations among ICBs and trauma. Given that individuals with high neuroticism may be particularly likely to use ICBs to regulate emotions following a trauma, the purpose of this study was to test whether neuroticism moderated the relationship between trauma-related symptoms and each type of ICB (purging, restricting, and excessive exercise).

Method

A community sample of adults with a DSM-5 ED (N = 263; 83.7 % female) completed measures of trauma-related symptoms, ED psychopathology, and personality.

Results

Zero-inflated negative binomial models revealed that trauma-related symptoms alone predicted restricting and purging behavior. In addition, we found that neuroticism alone predicted the presence of excessive exercise. We found no significant interaction between trauma-symptoms and neuroticism.

Conclusion

Although past research has documented high rates of co-occurring ED and PTSD, the connections between trauma-related symptoms and ICBs are complex and may be unique to each type of ICB. Given that neuroticism may not influence the relationship between trauma-related symptoms and ICBs, more research should be done to establish an understanding of factors that could explain the relationship between ICBs and trauma-related symptoms. Novel interventions that simultaneously target restricting, purging, and trauma-related symptoms could be beneficial to explore.

Emerging research suggests that modifying the presentation context of healthy food items can subtly ‘nudge’ individuals to make healthier choices. The present study aimed to investigate the effect of spatial separation between high and low nutritional value items on food and drink choices from an online fast-food menu. Participants (N = 210 women) were presented with one of three pictorial menus in which high nutritional value food and drink items were presented spatially mixed, grouped, or separate from low nutritional value items. Participants were asked to make one selection from each menu category (a main, drink, and dessert), and then completed a measure of dietary restraint. Overall, there was no main effect of menu condition. However, dietary restraint status moderated the effect of menu condition on healthy choices. In particular, women who scored low (but not those who scored high) on dietary restraint were positively influenced by the experimental manipulation, making approximately 14 % healthier selections when high nutritional value items were presented separately from low nutritional value items. This was principally the case for desserts, and to a lesser extent drinks. The findings have practical implications for the design of online fast-food menus to promote healthier food and drink selections.