biostudies-literatureHwang SWAHRQ HHS779-84https://www.ebi.ac.uk/biostudies/studies/S-EPMC2553875biostudies-literatureUnknown179(8)<h4>Background</h4>We sought to determine the lifetime prevalence of traumatic brain injury and its association with current health conditions in a representative sample of homeless people in Toronto, Ontario.<h4>Methods</h4>We surveyed 601 men and 303 women at homeless shelters and meal programs in 2004-2005 (response rate 76%). We defined traumatic brain injury as any self-reported head injury that left the person dazed, confused, disoriented or unconscious. Injuries resulting in unconsciousness lasting 30 minutes or longer were defined as moderate or severe. We assessed mental health, alcohol and drug problems in the past 30 days using the Addiction Severity Index. Physical and mental health status was assessed using the SF-12 health survey. We examined associations between traumatic brCMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienneThe effect of traumatic brain injury on the health of homeless people.PMC25538751 R01 HS014129-01R01 HS014129Colantonio ACowan LLevinson WHwang SWRedelmeier DAKiss AChiu STolomiczenko GfalseThe effect of traumatic brain injury on the health of homeless people.<h4>Background</h4>We sought to determine the lifetime prevalence of traumatic brain injury and its association with current health conditions in a representative sample of homeless people in Toronto, Ontario.<h4>Methods</h4>We surveyed 601 men and 303 women at homeless shelters and meal programs in 2004-2005 (response rate 76%). We defined traumatic brain injury as any self-reported head injury that left the person dazed, confused, disoriented or unconscious. Injuries resulting in unconsciousness lasting 30 minutes or longer were defined as moderate or severe. We assessed mental health, alcohol and drug problems in the past 30 days using the Addiction Severity Index. Physical and mental health status was assessed using the SF-12 health survey. We examined associations between traumatic br2008-01-01T00:00:00Z2008 Oct2025-04-19T06:41:30.343Z2019-03-27T00:18:38ZS-EPMC25538751883845310.1503/cmaj.080341