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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Factor structure and familiality of first-rank symptoms in sibling pairs with schizophrenia and schizoaffective disorder.

BACKGROUND: Since their introduction as diagnostic criteria by Schneider in 1937, nuclear symptoms have played a key role in concepts of schizophrenia, but their relationship to each other and to genetic predisposition has been unclear. AIMS: To ascertain the factor structure and familiality of nuclear symptoms. METHODS: Nuclear (Schneiderian) symptoms were extracted from case notes and interviews in a study of 103 sibling pairs with DSM-III-R schizophrenia or schizoaffective disorder. RESULTS: Principal components analysis demonstrated two major factors: one, accounting for about 50% of the variance, groups thought withdrawal, insertion and broadcasting, with delusions of control; and the second, accounting for < 20% of the variance, groups together third-person voices, thought echo and running commentary. Factor I was significantly correlated within sibling pairs. CONCLUSIONS: The correlation within sibling pairs suggests that, contrary to the conclusion of some previous studies, some nuclear symptoms do show a degree of familiality and therefore perhaps heritability.[1]

References

  1. Factor structure and familiality of first-rank symptoms in sibling pairs with schizophrenia and schizoaffective disorder. Loftus, J., Delisi, L.E., Crow, T.J. The British journal of psychiatry : the journal of mental science. (2000) [Pubmed]
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