Month of Birth, a Risk Factor for Violent Behaviour
in Suicidal Patients Admitted in Emergency?
Lionel Cailhol Æ Raluca Moraru Æ Remy Barbe Æ Anne-He
ne Moncany Æ
Sophie Garcin Æ Coralie Lazignac Æ Cristian Damsa
Published online: 21 April 2009
Ó Springer Science+Business Media, LLC 2009
Abstract 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 medi-
cation. 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.
Keywords Month of birth Á Suicide attempt with medication Á Violent behavior Á
This paper was presented as a new research poster in the last APA Congress May 2007.
L. Cailhol Á A.-H. Moncany
Service of psychiatry and medical psychology, Universitary Hospital of Purpan-Casselardit,
170, Avenue de Casselardit, 31059 Toulouse, Cedex, France
L. Cailhol Á R. Moraru Á R. Barbe Á S. Garcin Á C. Lazignac Á C. Damsa
Cantonal Universitary Hospital Geneva, 24, rue Micheli-du-Crest, 1211 Geneva, Switzerland
C. Damsa (&)
Department of Psychiatry, Clinical Investigation Program, University of Colorado Health Sciences
Center, 4455 East 12th Avenue, Denver, CO 80220, USA
Psychiatr Q (2009) 80:125–130