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Parental representation in twins discordant for schizophrenia

Published online by Cambridge University Press:  09 July 2009

Sidsel Onstad ,
Ingunn Skre ,
Svenn Torgersen  and
Einar Kringlen
Sidsel Onstad*
Affiliation:
Departments of Psychiatry and Psychology, University of Oslo, Norway
Ingunn Skre
Affiliation:
Departments of Psychiatry and Psychology, University of Oslo, Norway
Svenn Torgersen
Affiliation:
Departments of Psychiatry and Psychology, University of Oslo, Norway
Einar Kringlen
Affiliation:
Departments of Psychiatry and Psychology, University of Oslo, Norway
*
1Address for correspondence: Dr Sidsel Onstad, Department of Psychiatry, University of Oslo, PO Box 85, 0319 Oslo 3, Norway.
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Synopsis

Parental representation was assessed with the Parental Bonding Instrument (PBI) in 12 monozygotic (MZ) and 19 dizygotic (DZ) same-sexed twin pairs discordant for DSM-III-R schizophrenia. The schizophrenic twins reported less care and more overprotection from both parents than the non-schizophrenic co-twins. Multiple regression analysis disclosed that the results were independent of sex and age. Furthermore, the analysis demonstrated that whether the twins were monozygotic or dizygotic had no impact on the results. A stepwise discriminant analysis showed that difference in perceived paternal protection was the most important variable distinguishing between schizophrenic probands and their non-schizophrenic co-twins.

Type
Original Articles
Information
Psychological Medicine , Volume 23 , Issue 2 , May 1993 , pp. 335 - 340
Copyright
Copyright © Cambridge University Press 1993

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