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Month of birth, a risk factor for violent behaviour in suicidal patients admitted in emergency?

Lionel Cailhol1, Raluca Moraru, Remy Barbe

  • 1Service of psychiatry and medical psychology, Universitary Hospital of Purpan-Casselardit, 170, Avenue de Casselardit, 31059, Toulouse, Cedex, France.

The Psychiatric Quarterly
|April 22, 2009
PubMed

Although there are numerous publications on the existing link between month of birth and suicide, only two studies focus on suicide attempts and auto-aggressive behavior. Research data suggest that month of birth is related to a variation of 5-HIAA in the cerebrospinal fluid, which correlates with violent behavior (VB). Therefore, the aim of this study is to search, for the first time, for a possible link between month of birth and the occurrence of VB in emergency, for patients admitted for a suicide attempt with medication. This is a 10 months prospective study among all the patients of the canton of Geneva, Switzerland, admitted in emergency for a suicide attempt with medication. During a 10 months study period we included 493 patients, of which 77 (15.62%) presented VB. Higher incidence of VB was found in subjects where born at the end of winter and the beginning of spring, with a maximum for April and a minimum for December. In spite of a relatively small number of subjects, it seems promising to study the occurrence of VB as a function of month of birth in patients admitted in emergency for a suicide attempt.

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