Individuals who receive an HIV diagnostic test are assigned to a geographic region based on their residence or, if unknown, the address of the ordering provider. About 27% of tests are missing information on address of residence and assigned based on provider address.
Health regions are aggregations of public health units and their boundaries (see Tables and Figure below).
Table 1. Aggregations of public health units for each health region
Health region
Public health unit
Toronto
Toronto
Ottawa
Ottawa
Northern
Algoma, North Bay Parry Sound, Northwestern, Porcupine, Sudbury, Thunder Bay, Timiskaming
Eastern
Eastern Ontario; Hastings and Prince Edward Counties; Kingston, Frontenac, Lennox & Addington; Leeds, Grenville and Lanark; Renfrew
Central East
Durham; Haliburton, Kawartha, Pine Ridge; Peel; Peterborough; Simcoe Muskoka; York Region