Article Figures & Data
Tables
Location Number of Reported Episodes Episodes by Year, on Average Number of Victims, on Average Number of Wounded, on Average Number of Cases Ending With the Suicide of the Perpetrator(s) US 44 1.0 (1966 to 2008) 3.8 6.3 15 (34%) Canada 7 .2 (1975 to 2007) 3.4 7.5 4 (57%) Europe 7 .4 (1989 to 2008) 6.8 8.5 6 (85%) Other 5 .5 (1997 to 2008) 3.0 2.2 None Reported in Wikipedia; updated as of May 29, 2008.
Predicted on the Basis of Past Studies* Occurred in Real Case Scenarios† High-Risk Factors Uncontrolled anger Threats of violence Recent history of violence History of aggression Detailed plan, often communicated to others Past history of violence Threats of violence Blames others for problems History of suicidal behavior Recent loss History of aggression Family history of violence Symptoms of depression/hopelessness Uncontrolled anger History of substance abuse Social isolation (real or perceived) Depression and/or suicidal threats Medical condition Feelings of being persecuted or bullied Poor coping and social skills Use of medication Access to firearms Feelings of being rejected by peers Access to and experience with weapons Feelings of being persecuted or bullied Recent loss Access to firearms Recent humiliation Fascination with weapons and explosives Communication of violent intentions Organized for attack Lack of a prosocial support system Recent loss Lack of supervision at home * Extracted from References 41 and 44.
† Extracted from Reference 14, and Reference 10, p 43.
