Several well designed studies have shown a reduction of significant symptoms in patients with borderline personality disorder on inpatient or day hospital basis with cognitive-behavioural or dynamic medium length programs.

In present study we asses the socio-demographic and clinical variables that predict the evolution of 90 patients (60 BPD) who attended a Day Program with a dynamic approach based on the theory of object relations, during 66 days average stay.

Group therapy is part of a multidimensional programme, including the prescription and control of medication, offering a range of corrective experiences which allow the modification of the symptoms of the patient, his or her social adaptation and, ideally, their relationship structures.

Favourable results have been found in patients with borderline personality disorders when compared to those of patients with other diagnoses and with their status during the year preceding their admission to the hospital program.

Co-morbidity, substance abuse, early onset of the symptoms, bad social adjustment and other clinical and social variables were detected as poor outcome predictors.