M2
Slide 14
CONTENT
Multimorbidity and Complexity of Care Needs
One of the defining characteristics of health among people experiencing homelessness is not the presence of a single disease, but the coexistence of multiple interacting conditions. This pattern is known as multimorbidity — the presence of two or more chronic conditions in one individual.
Among homeless populations, multimorbidity often includes:
Chronic physical illness
Severe mental health disorders
Substance use disorders
Social instability
In many cases, this combination evolves into trimorbidity, where physical illness, mental illness, and addiction coexist simultaneously.
Early Onset and Accelerated Ageing
In the general population, multimorbidity is typically associated with older age. In homeless populations, however:
Multimorbidity appears decades earlier.
Individuals in their 40s may present with disease profiles typical of housed individuals in their 70s.
Chronic stress and deprivation accelerate biological ageing.
Repeated exposure to trauma, environmental hardship, malnutrition, and poor access to preventive care contribute to this accelerated disease burden.
Interaction Between Conditions
Multimorbidity in homelessness is not simply additive — conditions interact. For example:
DIABETES
increases infection risk and slows wound healing.
DEPRESSION
reduces treatment adherence for chronic illness.
ALCOHOL
use worsens liver disease and cardiovascular risk.
RESPIRATORY DISEASE
is exacerbated by smoking and environmental exposure.
These interactions increase complication rates and hospital admissions.
Care plans must therefore consider the interdependence of conditions.
Fragmentation and Care Discontinuity
Traditional healthcare systems are often organised around single-disease specialisation.
WHAT PEOPLE EXPERIENCING HOMELESSNESS COMMONLYENCOUNTER
Attend multiple emergency departments
Have inconsistent primary care access
Miss follow-up appointments
Lack stable contact information
Interrupt medication regimens
WHAT FRAGMENTED SYSTEMS COMMONLYDELIVER
Treatment plans are rarely coordinated.
Medication interactions may be overlooked.
Preventive care is delayed.
Clinical information is not shared effectively.
The system treats diseases separately, while the patient experiences them simultaneously.