Symptom ratings were made using the SAPS and SANS and the OPCRIT checklist on the members of 109 sibling pairs with DSM-IV schizophrenia or schizoaffective disorder.
Associations of schizophrenia subtypes, psychotic symptoms (defined by SAPS/SANS and OPCRIT), affective episodes and demographic variables were studied in 109 sibling pairs with DSM-IV schizophrenia or schizoaffective disorder.