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A Twin Study of Suicide

Published online by Cambridge University Press:  01 August 2014

N. Juel-Nielsen  and
Th. Videbech
N. Juel-Nielsen*
Affiliation:
Dept. of Psychiatry, Odense; Dept. of Psychiatry, Århus; and The Danish Twin Register, Odense
Th. Videbech
Affiliation:
Dept. of Psychiatry, Odense; Dept. of Psychiatry, Århus; and The Danish Twin Register, Odense
*
Dept. of Psychiatry, Odense, Denmark

Extract

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Suicide is a complex problem and a phenomenon of mankind which is obviously influenced by a multitude of ethnological, socio-cultural, psychological and various other factors.

That a man takes his own life does not necessarily mean that he was mentally abnormal. On the other hand, it is a well established fact that the frequency of mental illness — affective disorders in particular — is high among suicides, and that one in six patients suffering from manic-depressive psychosis will commit suicide (Sainsbury, 1968). A family history of suicide is not quite uncommon, and beforehand one cannot exclude the possibility that somehow genetic factors may play a part in suicide; but evidence in favour of such an assumption seems to be scanty.

A survey of the literature reveals that there have been very few twin studies of suicide, and so far concordance in MZ twins seems to have been reported in three cases only.

The first case was observed, already in 1812, by a Dr. Stephens Williams from Massachusetts. He described twin brothers, presumably MZ, who both were captains and had distinguished themselves in the War of Independence. One of the twins settled down in the beautiful state of Vermont, whereas the other remained in Springfield. For several years, they continued to live apart, until, within short interval, they both committed suicide by cutting their throat. Williams points out that the mother and two siblings of the twins had presented symptoms of mental illness, and that, prior to their death, both had been in a state of melancholy, probably an endogenous depression.

Type
Session 17 - Twin Studies in Psychiatry and Neuropathology
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 19 , Issue 1-2 , April 1970 , pp. 307 - 310
Copyright
Copyright © The International Society for Twin Studies 1970

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