[Diagnostic criteria for borderline schizophrenia on the basis of the SSDBS (symptom schedule for the diagnosis of borderline schizophrenia). A comparison between borderline syndrome, schizophrenias and affective diseases].

In the present study the SSDBS, a reliable instrument for detecting borderline schizophrenia developed by Khouri and co-workers (1980), was used to determine the number of probands with this diagnosis in an index sample composed of heterogeneous borderline syndromes as well as in schizophrenic, manic and depressive control groups. On this basis, significant differences between borderlines, on the one hand, and those with mania and depression, on the other, came to light--even after controlling for Schneider's first rank symptoms-, whereas none occurred between borderline patients and probands with schizophrenia. The research problem of SSDBS-symptom overlap with the symptomatology found in the schizophrenics of the present investigation as well as the possibility that other borderline concepts not based on the SSDBS might overlap more with morbid affectivity was then discussed.