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Svenn Torgersen, DPh

Arch Gen Psychiatry. 1986;43(5):502-505.

Abstract
• I investigated the contribution of hereditary factors in somatoform disorders. Fourteen monozygotic and 21 dizygotic index twins and their co-twins were personally interviewed. The results showed a concordance of 29% in monozygotic and 10% in dizygotic pairs. However, similarity in childhood experience seemed to influence the concordance rates. Thus, even if somatoform disorders appear familial, the transmission may be environmental. Furthermore, the study showed a high frequency of anxiety disorders, especially generalized anxiety disorders, in the co-twins of somatoformdisordered twins.

Author Affiliations
From the Department of Psychiatry, University of Oslo.

Footnotes
Accepted for publication March 13, 1985.

Reprint requests to Department of Psychiatry, University of Oslo, PO Box 85, Vinderen, 0319 Oslo 3, Norway (Dr Torgersen).

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