“…Cluster analyses with homeless individuals have been conducted using multiple variables: sociodemographic (e.g., age and sex), clinical (e.g., mental health disorders (MHD) and substance use disorders (SUD)) and service use (e.g., frequency of emergency department visits (ED) and hospitalizations) [ 2 , 17 , 20 , 25 ]. Some typologies have included risk factors (e.g., victimization and arrest history) and protective factors (e.g., social support and positive perceived health) as pertinent variables [ 15 , 22 ]. However, several variables have been less studied with respect to housing stability, including suicidal behavior and functional disability, both very prevalent in homelessness [ 26 ]; use of public primary care services, such as having a family doctor [ 27 , 28 ]; or required codes of living/conduct in different housing models [ 29 , 30 ], for example enforcing stringent abstinence policies against substance use as opposed to the harm reduction policies characteristic of Housing First, a PH model with case management [ 31 , 32 ], which offers direct access for homeless individuals with serious MHD and/or SUD to a PH without the obligation to participate in treatment [ 33 ].…”