[Basic symptoms in schizophrenia and alcoholism. A methodological comparative study].

The results of a study on the subjective basic symptoms associated with schizophrenia and drug abuse (especially alcoholism) are presented. A total of 242 psychiatric inpatients (74 with a dual diagnosis of schizophrenia and drug consumption, 81 schizophrenics, and 87 alcoholics) were included. The three groups did not differ with regard to the general score of subjective basic symptoms measured by the Frankfurt Complaint Questionnaire (Frankfurter Beschwerde-Fragebogen, FBF). Further analyses showed that the FBF statements are only partly typical for schizophrenia; another part is connected with alcoholism. Two new scales ("FBF-S" and "FBF-A") were created from the schizophrenia-typical items and the alcoholism-typical items, respectively. In "FBF-S" schizophrenics (with and without alcoholism) had higher scores than patients suffering from alcoholism alone; in "FBF-A" alcoholics (with and without schizophrenia) reached higher scores than schizophrenic patients. Consistent correlations with independent parameters of psychosis and alcoholism confirm the validity of "FBF-S" and "FBF-A". It is concluded that the FBF's capacity to discriminate different diagnoses can be improved and that the model of basic disturbances must be re-evaluated.