Housing First: exploring participants' early support needs.

Background: Housing First has become a popular treatment model for homeless adults with mental illness, yet little is known about program participants' early experiences or trajectories. This study used a mixed methods design to examine participant changes in selected domains 6 months after enrollment in a Canadian field trial of Housing First.

Methods: The study sample included 301 participants receiving the Housing First intervention at the Toronto site of the At Home/Chez Soi project.