Transdiagnostic study of impulsivity and self-injurious behaviour in unstable and impulsive disorders

Abstract

Introduction. High comorbidity between borderline personality disorder (BPD) and eating disorders (ED) shows the necessity of developing transdiagnostic models, where impulsivity could play a relevant role in the manifestations of self-injurious behaviour. Objectives: 1) To compare the levels of impulsivity and self-injurious behaviour among people with BPD, people with ED and controls. 2) To predict the presence of self-injurious behaviour based on impulsivity and other relevant clinical variables, such as the experience of traumatic events and sensitivity to rejection. Methods. 108 women (23 controls; 29 with a diagnosis of restrictive ACT (rED); 21 with a diagnosis of purgative ACT (pED); and 35 with a diagnosis of BPD) were assessed using the Barratt Impulsivity Scale, the Traumatic Experiences Questionnaire and the Sensitivity to Rejection Questionnaire. Information about self-injurious behaviour was collected through interview and clinical history. Results. Differences in impulsivity and self-injurious behaviour scores were found between the groups, with higher impulsivity in the BPD and pED groups, and higher rates of self-injurious behaviour in the BPD group followed by both ED groups. On the other hand, impulsivity predicted suicide attempts, and together with sensitivity to interpersonal rejection predicted nonsuicidal self-harm (NSSH). Conclusion. Impulsivity is a dimensional variable in BPD and ED, which in turn plays a relevant role in the prediction of self-injurious behaviour.Acknowledgements and conflicts of interest. This work has been supported by the project PI16/01949, integrated in the Plan Nacional de I+D+I, AES 2013-2016; funded by the ISCIII and co-financed by the Fondo Europeo de Desarrollo Regional (FEDER). “Una forma de hacer Europa