Year: 2017 Source: JAMA Psychiatry. (2017). Published online 26 July 2017. doi:10.1001/jamapsychiatry.2017.1925 SIEC No: 20170406

In this longitudinal cohort study of administrative records from 9650 medically documented soldiers who attempted suicide between the years 2004 and 2009 and 153 528 control person-months, the risk of suicide attempt among soldiers increased as the number of past-year suicide attempts within their unit increased. This finding was true for combat arms and other occupations and for units of any size but particularly for smaller units (1-40 soldiers).