Dysphoria Dimensional Model for Feeding And Eating Disorders: a Preliminary Study

BACKGROUND: Anorexia Nervosa (AN), Bulimia Nervosa (BN) and Binge Eating Disorder (BED) are severe psychiatric illnesses which represent the main expression of Feeding and Eating Disorders (FED). Clinicians agree that emotional and behavioural dysregulation play a crucial role in FED. Dysphoria could help us to better understand these components. Indeed, we define dysphoria as a generic state of dissatisfaction and emotional instability, without any specific features. Among the multitude of symptoms, we find that irritability, discontent, interpersonal resentment and surrender prevail. These dimensions correspond to the four subscales of Neapean Dysphoria Scale - Italian version (NDS-I). Dysphoria role in FED has not yet been investigated. Using this test, we can characterize dysphoria both in quantitative and qualitative terms. Accordingly, domain evaluation could discriminate these disorders allowing us to assess possible differential phenomenological expressions. AIMS: The aim of this paper is to understand in which way the dimensional spectrum that composes dysphoria differs between Anorexia Nervosa, Bulimia Nervosa and Binge Eating Disorders through an observational comparative study. SUBJECTS AND METHODS: The enrolled sample (30 patients) is represented by patients with a history of FED (AN, BN or BED). Patients were males and females between the ages of 13 and 45 with a good knowledge of Italian language. Patients with severe cognitive impairment (MMSE <19) and civil incapacitation were excluded. Patients were recruited from the Psychiatric Service of the Santa Maria della Misericordia Hospital in Perugia (PG), and other residential and semi residential structures specialized in FED treatment (FED specialized center at Palazzo Francisci in Todi (PG), Nido delle Rondini in Todi (PG), BED (Binge Eating Disorders) center in Citta della Pieve (PG) and ambulatory services for FED in Umbertide (PG)). We administered them the Neapen Dysphoria Scale - Italian Version (NDS-I), a specific dimensional test for dysphoria. Starting from the dataset, with the aid of the statistical program SPSS 20, we have carried out a comparison between disorders groups selected and NDS-I total score and subscales (irritability, discontent, interpersonal resentment, surrender). For this we have used the Mann-Whitney U test, a nonparametric test with 2 independent samples, by setting a significance level p<0.05. CONCLUSIONS: This study allowed us to better understand and characterize the most common Eating Disorders. Beyond that, despite the small sample size, we found in our analysis statistically significant difference in the expression of various dysphoria dimension spectrum inside our 3 groups.