An experimental analysis of the affect regulation model of binge eating

A dialectical behavior therapy skills training smartphone app for recurrent binge eating: a randomized clinical trial

BACKGROUND

Dialectical behavior therapy (DBT) is a specialized treatment that has a growing evidence base for binge-spectrum eating disorders. However, cost and workforce capacity limit wide-scale uptake of DBT since it involves over 20 in-person sessions with a trained professional (and six sessions for guided self-help format). Interventions translated for delivery through modern technology offer a solution to increase the accessibility of evidence-based treatments. We developed the first DBT-specific skills training smartphone application (Resilience: eDBT) for binge-spectrum eating disorders and evaluated its efficacy in a randomized clinical trial.

METHOD

Participants reporting recurrent binge eating were randomized to Resilience (n = 287) or a waitlist (n = 289). Primary outcomes were objective binge eating episodes and global levels of eating disorder psychopathology. Secondary outcomes were behavioral and cognitive symptoms, psychological distress, and the hypothesized processes of change (mindfulness, emotion regulation, and distress tolerance).

RESULTS

Intention-to-treat analyses showed that the intervention group reported greater reductions in objective binge eating episodes (incidence rate ratio = 0.69) and eating disorder psychopathology (d = -0.68) than the waitlist at 6 weeks. Significant group differences favoring the intervention group were also observed on secondary outcomes, except for subjective binge eating, psychological distress, and distress tolerance. Primary symptoms showed further improvements from 6 to 12 weeks. However, dropout rate was high (48%) among the intervention group, and engagement decreased over the study period.

CONCLUSION

A novel, low-intensity DBT skills training app can effectively reduce symptoms of eating disorders. Scalable apps like these may increase the accessibility of evidence-based treatments.

Emotional food craving across the eating disorder spectrum: an ecological momentary assessment study

PURPOSE

Emotional eating during negative emotions might underlie disordered eating behavior (i.e., binge eating and food restriction). Positive emotions, by contrast, seem to promote healthier eating behavior. Naturalistic research on the links between emotions and eating across individuals with binge-eating disorder (BED), bulimia nervosa (BN), binge-purge anorexia nervosa (AN-BP), and restrictive anorexia nervosa (AN-R) is, however, lacking.

METHODS

Individuals without eating disorders (comparison group, CG, n = 85), and patients with BED (n = 41), BN (n = 50), AN-BP (n = 26), and AN-R (n = 29) participated in an ecological momentary assessment study. Six daily notifications over eight days prompted ratings of momentary food craving and emotional states differing in valence and arousal.

RESULTS

Results supported specific emotion-food-craving patterns in each group. Compared to the CG, arousing negative emotions and higher cravings co-occurred in patients with BN. In patients with AN-BP (at trend level also in patients with AN-R) less arousing negative emotions and lower cravings co-occurred. In patients with AN, positive emotions and higher cravings co-occurred whereas in patients with BED less arousing positive emotions and lower cravings co-occurred.

CONCLUSION

The found emotion-craving associations may underlie group-specific (dys-)functional eating behaviors, i.e., binge eating and food restriction during negative emotions in patients with BN and AN, and normalized appetitive responses during positive emotions in patients with BED and AN. Therapeutic efforts could target arousing negative emotions in patients with BN, and less arousing negative emotions in patients with AN. Positive emotions could be used in a salutogenetic approach in patients with BED and AN.

Tonight, I'm disordered eating: The effects of food delivery app use, loneliness, and mood on daily body dissatisfaction and disordered eating urges

With the recent proliferation of food delivery applications ('apps'; FDAs), accessing a meal is more convenient and immediate than ever. However, these apps may foster dysregulated eating behaviours, including maladaptive eating to cope with negative emotional states. Using ecological momentary assessment (EMA), the current study assessed whether FDA use at baseline predicted levels of EMA-assessed disordered eating urges and body dissatisfaction, whether negative mood and loneliness impacted disordered eating urges and body dissatisfaction at the state level, and whether the latter relationships were moderated by FDA usage frequency. Participants (N = 483; 78.7% women; 20.1% men; 1.2% other) completed a baseline questionnaire and were characterised as current FDA users (49.3%) or non-users (50.7%). Participants then completed a smartphone-facilitated investigation into their experiences of loneliness, negative mood, body dissatisfaction, and disordered eating urges, six times per day for 7-days. Across the entire sample, current FDA users at baseline reported greater EMA-assessed urges to overeat. At the state level, loneliness and negative mood predicted greater body dissatisfaction, with the latter also predicting greater urges for restrictive eating and overeating. Among current FDA users at baseline, at the state level, loneliness predicted greater body dissatisfaction, and negative mood predicted greater body dissatisfaction and urges for overeating. No moderating effects were observed for baseline FDA usage frequency. These results elucidate FDA use and daily experiences of loneliness and negative mood as factors elevating eating disorder (ED)-related risk. Further extensions of this research with nuanced measures of state FDA use are required.

Associations among weight-based teasing distress, impulsive emotion regulation, and loss of control eating in racially and ethnically diverse young men

According to affect regulation models, distress associated with weight-based teasing may be related to loss of control (LOC) eating. Maladaptive coping strategies may further exacerbate this association, but such hypotheses have not been evaluated in men. The purpose of the current study was to examine the association between distress from weight-based teasing and LOC eating in racially and ethnically diverse young men. The degree to which men engage in impulsive behavior when distressed was investigated as a moderating variable. Exploratory analyses examined the proposed associations within racial/ethnic identity groups. The current study included 1011 young men (18-30 years, M_age = 23.9 ± 3.6 y, 28.3% non-Hispanic White; 23.4% African American; 24.3% Hispanic/Latino; 23.8% Asian/Asian American). Participants completed an online survey with measures of weight-based teasing, LOC eating frequency, engagement in impulsive behavior when distressed, and demographics. After adjusting for age, race/ethnicity, and body mass index, there was a positive association between distress from weight-based teasing and LOC eating frequency (p < .001). In the full sample, the tendency to engage in impulsive behavior when distressed exacerbated this link (p < .01). Exploratory analyses revealed the moderating effect of impulsive coping on distress from teasing was significant in non-Hispanic White men, but was not significant for all others. These findings suggest that men are not immune to the negative correlates of weight-based teasing. LOC eating may function as a maladaptive coping mechanism, or may be an artifact of the disordered eating symptoms that can emerge during extreme efforts to obtain a thinner physique.

A rational emotive behavior therapy-based intervention for binge eating behavior management among female students: a quasi-experimental study

BACKGROUND

Binge eating behavior is highly likely to progress to an eating disorder, with female students particularly at risk.

OBJECTIVE

This study aimed to verify the effect of a binge eating behavior management program, based on rational emotive behavior therapy (REBT), on binge eating behavior and related cognitive and emotional factors among female college students.

METHOD

The study, conducted from November 1 to December 2, 2016, involved a pretest-posttest design and nonequivalent control group. The sample included 24 and 22 first- to third-year students, from a college in South Korea, in the experimental and control groups, respectively. Data were collected using self-esteem, covert narcissism, perfectionism, body dissatisfaction, anxiety, depression, and binge eating scales and analyzed via frequency analysis, χ² tests, t tests, and analysis of covariance.

RESULTS

The results indicated that the REBT-based binge eating behavior management program exerted positive effects on participants' self-esteem, reducing covert narcissism, body dissatisfaction, anxiety, depression, and binge eating. However, there was no significant difference in perfectionism, although the experimental group's mean score decreased from pretest to posttest.

CONCLUSIONS

Based on the results, the program was considered to be effective, and is expected to be useful in preventing the development of eating disorders among female college students by treating binge eating behavior and related cognitive and emotional factors. This intervention could ultimately contribute to the improvement of female college students' health and quality of life.

An examination of the interpersonal model of binge eating over the course of treatment

The current study examined the interpersonal model of binge eating, which posits that interpersonal problems lead to negative affect, which results in binge eating, over the course of two psychotherapy treatments (interpersonal psychotherapy and cognitive behavioural therapy) in 162 adults with binge-eating disorder. A series of longitudinal simple mediation analyses preliminarily showed that treatment addresses the mechanisms of the interpersonal model of binge eating as theoretically proposed in predicting reductions in binge eating, the primary dependent variable, and the secondary dependent variables including global eating disorder psychopathology, shape concern, and weight concern, but not reductions in restraint or eating concern. Moderated mediation analyses did not fully support treatment differences, as changes in the mechanisms of the interpersonal model occurred in both treatments and suggest both treatments addressed negative affect and interpersonal precipitants of eating disorder symptomatology. Future research should replicate this study using variables that do not overlap in time to investigate causation of the model, and more generally, further examine theoretical treatment models and treatment mediators as this research could help improve efficacy of treatment for binge-eating disorder.

Impact on mindfulness, emotion regulation, and emotional overeating of a DBT skills training group: a pilot study

PURPOSE

The current study investigated the impact of a modified Dialectical Behavior Therapy skills (DBT) training group for patients at a hospital outpatient weight management clinic. Emotional eating is a problematic strategy for managing unpleasant feelings that can have a deleterious impact on weight management. DBT addresses emotional dysregulation via incorporation of skills aimed at coping with unpleasant affect.

METHODS

This study examines outcomes for 18 patients who participated in a 12-week DBT skills building group. A pre-post design with 3-month follow-up investigated the impact of the group on emotional eating, psychological distress, emotion regulation, and mindfulness.

RESULTS

Four repeated measures ANOVAs were run to assess for changes related to life difficulties and functioning, emotional overeating, emotion regulation, and mindfulness. Fisher's LSD tests assessed for linear and quadratic trends. Improvements in mindfulness, emotion regulation, and emotional overeating were found; these were maintained at follow-up.

CONCLUSIONS

This study demonstrated the utility of a group-based intervention aimed at improving emotion regulation and mindfulness skills among weight management patients. Further study is needed to determine whether improvements in the constructs studied in this research would translate to improved weight management outcomes and in determining the pathway for improvements.

LEVEL OF EVIDENCE

Level IV, multiple time series with intervention.

Independent and interactive associations of negative affect, restraint, and impulsivity in relation to binge eating among women

There is growing recognition that impulsivity may serve as an underlying risk factor for binge eating. In addition, the association of impulsivity with binge eating may be moderated by other affective and cognitive risk factors. This study examined independent and interactive associations of negative affect, dietary restraint, and facets of impulsivity with binge eating. A diverse sample of 566 undergraduate women completed online questionnaires of study variables. Results revealed a three-way interaction of negative affect, dietary restraint, and attentional impulsivity in relation to binge eating. Women who were high on each of these three variables reported the greatest levels of binge eating. In addition, a two-way interaction was found for negative affect and nonplanning impulsivity in relation to binge eating, such that nonplanning impulsivity strengthened the association between negative affect and binge eating. Attentional and nonplanning facets of impulsivity may function as an underlying trait-level risk factor interacts with affective and/or cognitive risk (e.g., negative affect, dietary restraint) factors to predict elevated binge eating.

Examination of the interpersonal model of loss of control eating in the laboratory

BACKGROUND

The interpersonal model of loss of control (LOC) eating proposes that interpersonal problems lead to negative affect, which in turn contributes to the onset and/or persistence of LOC eating. Despite preliminary support, there are no data examining the construct validity of the interpersonal model of LOC eating using temporally sensitive reports of social stress, distinct negative affective states, and laboratory energy intake.

METHOD

117 healthy adolescent girls (BMI: 75th-97th %ile) were recruited for a prevention trial targeting excess weight gain in adolescent girls who reported LOC eating. Prior to the intervention, participants completed questionnaires of recent social stress and consumed lunch from a multi-item laboratory test meal. Immediately before the test meal, participants completed a questionnaire of five negative affective states (anger, confusion, depression, fatigue, anxiety). Bootstrapping mediation models were conducted to evaluate pre-meal negative affect states as explanatory mediators of the association between recent social stress and palatable (desserts and snack-type) food intake. All analyses adjusted for age, race, pubertal stage, height, fat mass percentage, and lean mass.

RESULTS

Pre-meal state anxiety was a significant mediator for recent social stress and palatable food intake (ps<.05). By contrast, pre-meal state anger, confusion, depression, and fatigue did not mediate the relationship between social stress and palatable food intake (ps>.05).

DISCUSSION

Pre-meal anxiety appears to be the salient mood state for the interpersonal model among adolescent girls with LOC eating. Interventions that focus on improving both social functioning and anxiety may prove most effective at preventing and/or ameliorating disordered eating and obesity in these adolescents.