P02-69 Neurobiological and clinical predictors of impulsivity in bulimia nervosa

Objective The main aim of this study was to analyze the association between a set of neurobiological/clinical factors and impulsivity in patients suffering from bulimia nervosa, as well as the capability of this factors to predict the severity of impulsivity. Methods The Impulsive Behaviors Scale (IBS), the Diagnostic Interview for Bordeline Patients - Revised (DIB-R), the Beck Depression Inventory (BDI), the Millon Multiaxial Clinical Inventory (MMCI-II) and the Family Environment Scale (FES) were applied to 70 female patients with DSM-IV BN (purging subtype). Twenty-four hour urinary excretion of norepinephrine (NE), 3-methoxy-4-hydroxyphenylglycol (MHPG), serotonin (5-HT), 5-hydroxi-indol-acetic acid (5-HIAA), dopamine (DA), homovallinic acid (HVA), and morning serum cortisol levels before and after the administration of 1 mg of dexamethasone were determined. Results Impulsivity was associated to lower levels of urinary 5-HT and 5-HIAA, borderline features, and lower family expressed emotion. Conclusions The consideration of impulsivity as a core clinical feature in patients with bulimia nervosa could lead us to identify clinical subtypes of patients, with specific clinical profiles and specific treatment needs.