Association between anorexia nervosa and other specified eating or feeding disorders and paranoia in adolescents: what factors are involved?

Introduction. In eating disorders, the association with other psychiatric symptoms is of particular interest. The association between anorexia nervosa and psychotic symptoms is less studied than that with affective disorders (anxiety/depression). The aim of this study is to describe a psychotic symptom (paranoia) in adolescents with anorexia nervosa looking at several potential explicative associated factors: eating disorder symptoms, body image concerns, depression and social anxiety. Our hypothesis is that paranoia in anorexia nervosa patients is better explained by the concomitant depression and social anxiety symptoms than the core symptoms of the disease (eating disorder symptoms or body image concerns). Methods. This is a retrospective study. Consecutive, help-seeking adolescents, admitted to the Eating Disorder Service of the Integrated Pediatric Care Department, Luigi Vanvitelli University Hospital, constituted the sample. Data was obtained through retrospective collection of clinical interviews and self-report questionnaires, used for the routine assessment of these patients, administered by trained and expert child and adolescent psychiatrists, they were the Eating Attitude Test-26 (EAT-26), the Body Uneasiness Test-A (BUT-A), the Children Depression Inventory (CDI), the Liebowitz Social Anxiety Scale-Children and Adolescents (LSAS-CA) and the paranoia subscale of the Specific Psychotic Experiences Questionnaire (SPEQ). Results. We obtained data from 92 adolescents with anorexia nervosa and other specified feeding or eating disorder (OSFED). Our regression model explained that paranoia (SPEQ-paranoia subscale) in this population was better explained by depression (CDI) (coefficient= 0.415 SD: 0.210, p=0.052) and social anxiety symptoms (LSAS-CA) (coefficient= 0.253 SD: 0.060; p<0.001) than eating disorder symptoms (EAT-26) (coefficient= 0.092 SD: 0.107; p=0.398) and body image concerns (BUT-A) (coefficient= 1.916 SD: 2.079; p=0.359). Conclusions. This study has some theoretical, clinical and treatment implications. It is important to carrying out screening for the presence of psychotic symptoms in patients with eating or feeding disorders. These symptoms and associated factors (depression and social anxiety) may complicate the clinical picture of the disease with the need, in certain cases, of psychopharmacological drugs and, among these, anti-psychotics. Finally in the psychotherapy context, paranoid ideas may be subject of treatment for patient with anorexia nervosa.