By health region

Data source: Ontario HIV Laboratory Cohort
 

Key points

  • Health regions are aggregations of public health units and their boundaries. See Technical Notes for more information.
  • Health region data is only available from 2011 onwards, as address of residence was not collected prior to that year. For this reason, the figures below only present data for the year 2015. Data from 2011 to 2015 are available in the tables at the end of the page.
  • ART status is documented on viral load (VL) test requisitions by the ordering health care provider and is missing for 17 to 20% of requisitions. Those with missing data were assumed to be on ART if virally suppressed.
  • The percent of people with diagnosed HIV living in Ontario who were on ART increased over time for all health regions and was lower in the Northern region and slightly lower in Ottawa.

 

Figures

Figure 1 Percent of people with diagnosed HIV living in Ontario who were on ART by health region, 2015


Trends: In 2015, the percent of people with diagnosed HIV who were on ART was highest in the Central West and lowest in the Northern health region. See Tables 1 and 2 below for definitions and data from 2011 to 2015.
 

Tables and definitions

Table 1 Number of people with diagnosed HIV living in Ontario who were on ART by health region, 2011 to 2015


“on ART” definition
Documented on ART, or ART status missing and virally suppressed, on last viral load test requisition

Table 2 Percent of people with diagnosed HIV living in Ontario who were on ART by health region, 2011 to 2015


Estimate of percent on ART “on ART” definition (numerator) “Diagnosed” definition (denominator)
Main Documented on ART, or ART status missing and virally suppressed, on last viral load test requisition (See Table 1 above for data) Nominal HIV-positive diagnostic test or HIV viral load test, and not administratively lost to follow-up after 2 years (See Table 1 here for data)

 
Notes: Data provided by Public Health Ontario Laboratories. Diagnoses assigned to a health region based on their address of residence or, if unknown, the address of the ordering provider. ART status documented on viral load test requisition by ordering provider and missing for 17-20% of requisitions. Individuals missing information on sex were excluded (approximately 0.4%). Tables and Figures display main estimates only. A range of plausible values, calculated using alternative definitions, are available upon request.