This study attempted to determine if Housing First (HF) decreased suicidal ideation and attempts compared to
treatment as usual (TAU) amongst homeless persons with mental disorders, a population with a demonstrably high risk of
suicidal behaviour. The At Home/Chez Soi project is an unblinded, randomised control trial conducted across 5 Canadian cities
(Vancouver, Winnipeg, Toronto, Montreal, Moncton) from 2009 to 2013. Homeless adults with a diagnosed major mental
health disorder were recruited through community agencies and randomised to HF (n ¼ 1265) and TAU (n ¼ 990). HF
participants were provided with private housing units and received case management support services. TAU participants
retained access to existing community supports. Past-month suicidal ideation was measured at baseline and 6, 12, 18, and
21/24 months. A history of suicide attempts was measured at baseline and the 21/24-month follow-up.