Personality and eating and weight disorders: an open research challenge

Risk factors of disordered eating in adolescent girls from a community sample: a multidimensional approach

BACKGROUND

Eating disorders (ED) are severe, chronic, and complex in nature mental illnesses that are difficult to treat. One of the ways to stave off EDs is by screening among adolescents to preempt the development of clinical forms of ED in risk groups.

AIM

1) to investigate the prevalence of ED risk among adolescent girls and compare subgroups at high and low risk of ED; 2) to investigate using a multidimensional approach those variables that can interact with temperament and character traits to predict ED symptomatology.

METHODS

The cross-sectional observational self-report study of a community sample of adolescent girls 1217 years old (n=298; M=14.771.13) was carried out in the city of Ryazan, Russia. The Russian versions of Eating Attitudes Test and Cloningers Temperament and Character Inventory-Revised were used. In addition, an original questionnaire (Risk Factors of Eating Disorders) was developed. Regression models (to test for significant moderation) and path analysis (to test for significant mediations) were used.

RESULTS

Girls at risk of developing EDs are characterized by a heightened level of concern about weight and dissatisfaction with their body, tend to suffer from low self-directedness, higher novelty seeking and tendency to higher harm avoidance, display high alexithymia, experience self-distrust, negative emotionality and are dissatisfied with family relationships. They also suffer from low self-esteem and tend to be perfectionism and engage in risk behavior. Significant moderating effects were uncovered between the following ED risk factors: (1) self-distrust/risk behavior and BMI; (2) alexithymia/negative emotionality/self-esteem and cooperativeness; and (3) negative emotionality/risk behavior and self-transcendence. Family relationship dissatisfaction mediates the association between self-directedness/cooperativeness/self-transcendence and disordered eating.

CONCLUSION

There are various mutual influences between the numerous ED risk and prevention factors, which all together determine the paths between the predictors and final outcome.

Associations of personality traits with night eating among students in health sciences who live in a post-conflict setting

The intake of food later in the evening can have harmful health consequences. Some researchers suggest that having certain personality characteristics may be associated with the onset of eating disorders. There is a lack of studies on personality traits and night eating in a complex socio-political setting. The purpose of this study was to examine the association between personality traits and more intense night eating among students in northern Kosovo. A cross-section study was conducted in a population of health science students at the University in Kosovska Mitrovica. Students completed a socio-demographic questionnaire, Night Eating Questionnaire (NEQ), HEXACO-60 personality inventory, Beck's Depression Inventory (BDI) and Beck's Anxiety Inventory (BAI). The independent variables (exposures) were the six domains of the HEXACO-60 (Honesty-Humility, Emotionality, Extraversion, Agreeableness, Conscientiousness and Openness to Experience). The study outcome was the NEQ score. The study sample consisted of 534 students. The prevalence of night eating syndrome was 3.0%. The multivariate linear regression model suggested that stronger Extraversion and Openness to Experience were associated with more frequent night eating. Additionally, later bedtime, poorer sleep quality and higher scores on BDI and BAI were associated with more frequent night eating across all six models of models of personality traits. In a population of health science students who live in a complex socio-political environment, extraversion and openness to experience traits were associated with more frequent night eating. These findings could help researchers and clinicians tailor specific behavioral therapies to match the personality traits of people with night eating issues.

Measuring perfectionism, impulsivity, self-esteem and social anxiety: Cross-national study in emerging adults from eight countries

This study assessed the measurement invariance of selected self-report measures of perfectionism, impulsivity, self-esteem and social anxiety in samples of emerging adults from eight different countries. Participants (N = 6272) completed the Multidimensional Perfectionism Scale (MPS), the UPPS-P Impulsive Behavior Scale, the 5-item Rosenberg Self-Esteem Scale (5-item RSES) and the Social Interaction Anxiety Scale (SIAS-6). Multigroup confirmatory factor analysis was run to examine cross-measure equivalence. Evidence for structural invariance was found for all questionnaires, while weak invariance was supported only for the 5-item RSES and the SIAS-6, and a partial weak invariance was found for the MPS and the UPPS-P. No measure achieved strong invariance. Strict invariance was achieved for the 5-item RSES, whereas only a partial strict invariance was supported for the MPS, UPPS-P and SIAS-6. These results suggest that perfectionism, impulsivity, self-esteem, and social anxiety are subjected to linguistic/cultural influence as well as to the effects of socio-demographic variables and can be evaluated by using the selected measures in eight different countries worldwide - but results should be interpreted with caution.

Associations among eating disorder symptoms and the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) in college students

PURPOSE

To identify associations between eating disorder (ED) attitudes and behaviors and scores on the MMPI-2-RF in college students.

METHODS

The study included 425 undergraduate students (38.5% males and 61.5% females) with a mean age of 19.13 (SD = 1.77). Measures included the MMPI-2-RF and the Eating Disorder Examination Questionnaire. Correlations and relative risk ratios were computed between MMPI-2-RF scores and ED variables.

RESULTS

Scores on several MMPI-2-RF Scales were associated with the presence of subthreshold ED symptoms. Manifestations of emotional/internalizing dysfunction were associated with all ED symptom presentations.

CONCLUSIONS

The results of this study identified narrowly defined personality and psychopathology constructs relevant to, and found across college students experiencing various subthreshold ED symptoms. Considering this additional information in ED screening or treatment planning could reduce the likelihood of subthreshold symptoms worsening and increase the effectiveness of ED interventions with at-risk college student populations.

LEVEL OF EVIDENCE

Level III, evidence obtained from well-designed cohort or case-control analytic studies.

Cross-cultural differences in orthorexic eating behaviors: Associations with personality traits

OBJECTIVES

Sociocultural factors and personality traits play key roles in determining dietary behaviors. Orthorexia nervosa (ON), the pathologic obsession with healthy eating, is increasingly receiving scientific attention. However, mechanisms and risk factors are not completely understood. The aims of this study were to compare the prevalence of orthorexic eating attitudes among adults in Germany and Lebanon, and to examine the relationship with primary facets of personality and maladaptive personality traits.

METHODS

The German sample comprised 391 adults, of which 314 were women (80.3%) and the mean age was 27 y. The Lebanese sample comprised 519 adults, of which 283 were women (56%) and the mean age was 36 y. In addition to sociodemographic data, participants completed the Dusseldorf Orthorexia Scale (DOS), the Teruel Orthorexia Scale (TOS), the Big Five Inventory, and the Personality Inventory for the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition.

RESULTS

Generally higher levels of healthy orthorexia among women and higher levels of ON according to the TOS-ON and DOS scores were found in Lebanon. In the Lebanese sample, 8.4% presented a high risk for ON, whereas this was true for only 4.9% of the German sample. Some associations between DOS/TOS scores and personality traits appeared but coefficients were generally low. Hierarchical multiple regression showed that the negative association between ON and the traits agreeableness and negative affectivity was clearly evident in the Lebanese sample but less so in the German sample. Age, body mass index, marital status, and subjective social status were not relevant moderators of effects. Comparison by country indicated higher prevalence of pathologic healthful eating and ON in the Lebanese sample compared with the German group. Personality traits, but not sociodemographic variables, partly contributed to this difference.

CONCLUSION

The present results suggested the importance of sociocultural factors in the development of eating pathologies and proposed specific personality traits as important associated factors.

Orthorexia nervosa, eating patterns and personality traits: a cross-cultural comparison of Italian, Polish and Spanish university students

BACKGROUND

The amount of research about orthorexic attitudes and behaviours has increased in the last five years, but is still mainly based on descriptive and anecdotal data, yielding a variety of prevalence data and inconsistent results. The interplay between socio-cultural context and orthorexia has been poorly investigated and is still far from being understood.

METHOD

Multicentre, cross-sectional study involving Italian (N = 216), Polish (N = 206) and Spanish (N = 242) university students, assessed through a protocol including informed consent, socio-demographic and anamnestic data sheet and self-administered questionnaires (ORTO-15, Eating Attitudes Test- 26 [EAT-26], Temperament and Character Inventory [TCI]).

RESULTS

Higher prevalence of orthorexia (as described by the ORTO-15 cutoff) was found in Poland. Female gender, Body Mass Index (BMI), current Eating Disorder, dieting, EAT-26 score ≥ 20 and low/medium Persistence were associated with orthorexia in the whole sample. The cross-cultural comparison showed several differences among the three subgroups of students.

CONCLUSIONS

The associations found between orthorexic attitudes, self-reported current eating disorder, BMI and adherence to a dieting need to be supported by further research. The differences among students from the three countries seem to suggest a possible rolve for cultural elements in the construct of orthorexia.