title: Variables associated with familial suicide attempts in a sample of suicide attempters.
abstract: Attempted suicide appears to be a familial behavior. This study aims to determine the variables associated with family history of attempted suicide in a large sample of suicide attempters. The sample included 539 suicide attempters 18 years or older recruited in an emergency room. The two dichotomous dependent variables were family history of suicide attempt (10%, 51/539) and of completed suicide (4%, 23/539). Independent variables were 101 clinical variables studied with two data mining techniques: Random Forest and Forward Selection. A model for family history of completed suicide could not be developed. A classificatory model for family history of attempted suicide included the use of alcohol in the intent and family history of completed suicide (sensitivity, specificity, 98.7%; and accuracy, 96.6%). This is the first study that uses a powerful new statistical methodology, data mining, in the field of familial suicidal behaviors and suggests that it may be important to study familial variables associated with alcohol use to better understand the familiality of suicide attempts.
authors.affiliation: Department of Psychiatry, Fundacion Jimenez Diaz University Hospital, Autonoma University of Madrid, Avda. Reyes Católicos, 2, Madrid 28040, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Baca-Garcia
authors.forename: M Mercedes
authors.initials: MM
authors.lastname: Perez-Rodriguez
authors.forename: Dolores
authors.initials: D
authors.lastname: Saiz-Gonzalez
authors.forename: Ignacio
authors.initials: I
authors.lastname: Basurte-Villamor
authors.forename: Jeronimo
authors.initials: J
authors.lastname: Saiz-Ruiz
authors.forename: José M
authors.initials: JM
authors.lastname: Leiva-Murillo
authors.forename: Mario
authors.initials: M
authors.lastname: de Prado-Cumplido
authors.forename: Ricardo
authors.initials: R
authors.lastname: Santiago-Mozos
authors.forename: Antonio
authors.initials: A
authors.lastname: Artés-Rodríguez
authors.forename: Jose
authors.initials: J
authors.lastname: de Leon
mesh_terms: D000293:Adolescent; D000328:Adult; D019992:Databases as Topic / Q000706:statistics & numerical data*; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013406:Suicide, Attempted / Q000523:psychology* / Q000706:statistics & numerical data*