The Homelessness Project evaluated health service use among the homeless across six large health systems (HS) in the CAPriCORN network. An honest broker, the Medical Research Analytics and Informatics Alliance (MRAIA), was used to join CAPriCORN diagnosis and visit history data to regional Homeless Management Information System (HMIS) data from the city of Chicago and suburban Cook County. The team evaluated fragmentation of care, comorbidities, and health services use among the homeless population.
Results of the project revealed homelessness was much more common than previously recognized through health system administrative billing codes, and there was a subset of homeless who had not received services from the homeless system. The project found a strong association between stable housing and avoidance of emergency department visits and hospitalizations.
William Trick, MD, Internist at Cook County Health (CCH) was the principal investigator of the study. Fred Rachman, MD, Chief Executive Officer of AllianceChicago was co-investigator.
‐ William Trick, MD, Cook County Health (CCH)The Homelessness Project at the scale realized would not have been possible without the CAPriCORN infrastructure. The infrastructure provided working relationships between major healthcare institutions in the city of Chicago, a standardized data model for efficient extraction and linkage, a process for performing de-identified data linkage, and an honest broker to link data without the possibility of re-identification.
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