Psychiatric comorbidities are common among patients with schizophrenia. Substance abuse
comorbidity predominates. Anxiety and depressive symptoms are also very common …

Objective Most investigators presume that schizophrenia and affective disorder are separate
diseases. Others have proposed alternatives to this Kraepelinian view. These alternatives …

Objective Although most modern investigators accept the Kraepelinian view that
schizophrenia and affective disorder are biologically distinct, others have suggested the …

Morbidity risks for mental illness were determined in 750 first-degree relatives of chronic
schizophrenic and normal control probands. Psychiatric disorders that were more frequent in …

• Ninety-one consecutively admitted patients with schizophrenia (n= 21), schizoaffective
depression (n= 43), or psychotic depression (n= 27) entered a blind family study along with …

BackgroundThe hypothesis that schizophrenia is neurodevelopmental was investigated in a
prospective study of young people with a postulated 10–15% risk for the development of …

Data regarding the co-occurrence of anxiety symptoms or syndromes in schizophrenia is
scant. Hierarchical assumptions embedded in diagnostic systems and methodologic …

Schizophrenia is a severe mental illness that often co-occurs with and can be exacerbated
by other psychiatric conditions. There have not been adequate efforts to examine …

BackgroundAlthough a genetic component in schizophrenia is well established, it is likely
that the contribution of genetic factors is not constant for all cases. Several recent studies …

Strong familial aggregation of schizophrenia has been reported but there is uncertainty
concerning the degree of genetic contribution to the phenotypic variance of the disease. This …