Are there delusions specific for paranoid disorders vs. schizophrenia?

DSM-III proposes that only persecutory delusions and delusions of jealousy can occur in paranoid disorders, all other types of delusions in the absence of an affective syndrome being indicative of schizophrenia. The scant empirical evidence relevant to this issue suggests that the type of delusion on admission is not predictive of outcome in patients with paranoid psychosis. These findings raise questions about the validity of the distinction drawn in DSM-III between types of delusions.