Scores of daily function, employment, living situation, marital status and Global Assessment Scale in 979 persons diagnosed with schizophrenia and 1,509 of their relatives were found to be heritable, with global rating of function being the most heritable. The study, appearing in Schizophrenia Research, concludes that interventions at the family level may be beneficial for schizophrenia.
Savage, R; Heritability of Functioning in Families with Schizophrenia in Relation to Neurocognition, Schizophrenia Research, available online May 23 2012