Table 1 PICO

Population (Setting)

Care homes for primarily older adults (aged ≥65 years) defined as a facility with 24 h surveillance and access to some level of medical care within the facility.

Intervention (Exposure)

Facility size, facility location, facility design, use of temporary hired employment, staff compartmentalizing, residence of staff, and nurse aides hours per resident.

Comparison

No restriction

Outcome

An infectious disease outbreak (at least 1 resident infected in the care home facility). Studies that included disease outbreaks of non-infectious or non-communicable diseases were excluded.