Cut-offs for weekly levels and comparison with the previous week have been established using indicator data from previous respiratory seasons in Renfrew County and District and will be routinely reviewed, assessed, and updated as needed throughout the 2024/2025 respiratory season. The indicators and definitions may also be revised.
Indicator Details
The following section provides detailed information on the indicators found in the Respiratory Illness Data Summary.
New respiratory outbreaks in healthcare and congregate institutions:
Definition
Number of new respiratory outbreaks declared in healthcare (i.e. long-term care homes, retirement homes, hospitals) and congregate (i.e. group homes, shelters) institutions in the past week. Includes COVID-19, influenza, respiratory syncytial virus (RSV), and other respiratory outbreaks.
Data source
- COVID-19 outbreaks from 2020 to May 2024: The provincial Case and Contact Management (CCM) solution, Ministry of Health
- COVID-19 outbreaks from June 2024 to present, influenza, RSV and other respiratory outbreaks: The integrated Public Health Information System (iPHIS), Ministry of Health
Weekly level cut-offs
Based on distribution (approximate quartile cut-offs) of local data for last respiratory season (June 2023 – May 2024)
- Low= 0 outbreaks
- Moderate= 1 outbreak
- High= 2 outbreaks
- Very high= 3 outbreaks or more
Comparison with previous week cut-offs
Based on differences exceeding the 66th percentile of historical weekly differences for past 12 months at time of calculation (June 2023 – May 2024)
- Lower = A decrease of 2 outbreaks or more
- Similar = A change between -1 and 1 outbreak
- Higher = Any increase of 2 outbreaks or more
Hospital bed occupancy due to respiratory illness:
Definition
The average daily hospital occupancy count per week of people admitted to local hospitals primarily being treated for active infection of COVID-19, influenza, and/or respiratory syncytial virus (RSV).
Data source
Inpatient Data File (Hospital Bed Census) from the Ministry of Health (Capacity Planning and Analytics Division) SAS Visual Analytics Hub
Data considerations
Includes hospital admissions (including ICU admissions) to local hospitals, regardless of whether the patient is a resident of RCD. Does not include emergency department visits. People may be counted in bed occupancy data for multiple days.
Weekly level cut-offs
Based on distribution (approximate quartile cut-offs) of local data for the past 12 months at time of calculation (June 2023 – May 2024)
- Low = 0 beds occupied
- Moderate = 1 bed occupied
- High = 2-3 beds occupied
- Very high = 4 beds occupied or more
Comparison with previous week cut-offs
Based on differences exceeding the 66th percentile of historical weekly differences for the past 12 months at time of calculation (June 2023 – May 2024)
- Lower = A decrease of 2 beds occupied or more
- Similar = A change between -1 and 1 bed occupied
- Higher = An increase of 2 bed occupied or more
COVID-19 percent (%) positivity
Definition
Percent of all COVID-19 molecular tests processed in the past week which have a positive result.
Data source
Ontario Laboratories Information System (OLIS) from the Ministry of Health (Capacity Planning and Analytics Division) SAS Visual Analytics Hub
Data considerations
Includes reports submitted to the Ontario Laboratory Information System (OLIS). Not all laboratories report to OLIS and only individuals with health card numbers are included in the OLIS dataset. Does not include results from rapid antigen tests (RATs). For information of current testing eligibility, visit the Ministry of Health’s COVID‑19 testing and treatment webpage.
Weekly level cut-offs
Based on distribution (approximate quartile cut-offs) of local data for past 12 months at time of calculation (June 2023 – May 2024)
- Low = Under 6.0% positivity
- Moderate = 6.0 to 10.9% positivity
- High = 11.0 to 17.9% positivity
- Very high = 18.0% positivity or higher
Comparison with previous week cut-offs
Based on differences exceeding the 66th percentile of historical weekly differences for past 12 months at time of calculation (June 2023 – May 2024)
- Lower = A decrease of 5.0% or more
- Similar = A change between -4.9% and 4.9%
- Higher = Any increase of 5.0% or more
Influenza percent (%) positivity
Definition
Percent of all influenza tests (influenza A and B) processed in the past week which have a positive result.
Data source
Ontario Laboratories Information System (OLIS) from the Ministry of Health (Capacity Planning and Analytics Division) SAS Visual Analytics Hub.
Data considerations
Data includes reports submitted to the Ontario Laboratory Information System (OLIS). Not all laboratories report to OLIS and only individuals with health card numbers are included in the OLIS dataset.
For information on current testing eligibility, visit the Public Health Ontario Respiratory Viruses (including influenza) webpage.
Weekly level cut-offs
Based on the thresholds for influenza percent positivity levels used in the Ontario Respiratory Virus Tool by Public Health Ontario (described in the Technical Notes). Local data too variable and sporadic to establish meaningful cut-offs.
- Low = Under 10.0% positivity
- Moderate = 10.0 to 16.9% positivity
- High = 17.0 to 24.9% positivity
- Very high = 25.0% positivity or higher
Comparison with previous week cut-offs
Based on the comparison with previous week cut-offs for COVID-19 percent (%) positivity for consistency across indicators related to percent positivity. Local data is too variable and sporadic to establish meaningful cut-offs for influenza alone.
- Lower = A decrease of 5.0% or more
- Similar = A change between -4.9% and 4.9%
- Higher = An increase of 5.0% or more
Respiratory Syncytial Virus (RSV) percent (%) positivity
Definition
Percent of all RSV tests processed in the past week which have a positive result.
Data source
Ontario Laboratories Information System (OLIS) from the Ministry of Health (Capacity Planning and Analytics Division) SAS Visual Analytics Hub.
Data considerations
Data includes reports submitted to the Ontario Laboratory Information System (OLIS). Not all laboratories report to OLIS and only individuals with health card numbers are included in the OLIS dataset.
For information on current testing eligibility, visit the Public Health Ontario Respiratory Viruses (including influenza) webpage.
Weekly level cut-offs
Based on the thresholds for RSV percent positivity levels used in the Ontario Respiratory Virus Tool by Public Health Ontario (described in the Technical Notes). Local data is too variable and sporadic to establish meaningful cut-offs.
- Low = Under 5.0% positivity
- Moderate = 5.0 to 9.9% positivity
- High = 10.0% to 14.9% positivity
- Very high = 15.0% positivity or higher
Comparison with previous week cut-offs
Based on the comparison with previous week cut-offs for COVID-19 percent (%) positivity for consistency across indicators related to percent positivity. Local data is too variable and sporadic to establish meaningful cut-offs for RSV alone.
- Lower = A decrease of 5.0% or more
- Similar = A change between -4.9% and 4.9%
- Higher = An increase of 5.0% or more
Respiratory-related emergency department (ED) visits
Definition
Percentage of all ED visits by RCD residents that are specifically for respiratory-related concerns in the past week (syndrome = RESP)
Data source
The Acute Care Enhanced Surveillance Application (ACES), KFL&A Public Health
Data considerations
Includes data from most local emergency departments and non-local emergency departments that RCD residents may visit.
ACES, or Acute Care Enhanced Surveillance (ACES), is an Ontario-wide system that monitors hospital registration records in real time to identify potential disease outbreaks or other public health threats. It uses natural language processing to scan the words or phrases included in the “chief complaint” or “reason for admission” and to sort the records into “syndromes”. Monitoring syndromes in real time can identify an outbreak much faster than is possible using laboratory results, but syndromes are not clinical diagnoses and therefore need to be interpreted with care.
Weekly level cut-offs
Based on distribution (approximate quartile cut-offs) of local data for past 12 months at time of calculation (June 2023 – May 2024)
- Low = Less than 7.0% of visits
- Moderate = 7.0 to 9.9%% of visits
- High = 10.0 to 11.9% of visits
- Very high = 12.0% of visits or higher
For more information on respiratory-related emergency department visits in Ontario, visit KFL&A’s Viral Respiratory Mapper.
Comparison with previous week cut-offs
Based on differences exceeding the 66th percentile of historical weekly differences for the past 12 months at time of calculation (June 2023 – May 2024)
- Lower = A decrease of 2.0% or more
- Similar = A change between -1.9% and 1.9%
- Higher = An increase of 2.0% or more
Archived Data Notes
Influenza percent (%) positivity (Archived October 28, 2024)
Definition
Percent of all influenza tests (influenza A and B) processed in the past week which have a positive result
Data source
Public Health Ontario Laboratories
Data considerations
For information of current testing eligibility, visit the Public Health Ontario Respiratory Viruses (including influenza) webpage.
Weekly level cut-offs
Based on the thresholds for influenza percent positivity levels used in the Ontario Respiratory Virus Tool by Public Health Ontario (described in the Technical Notes). Local data too variable and sporadic to establish meaningful cut-offs.
- Low = Under 10.0% positivity
- Moderate = 10.0 to 24.9% positivity
- High = 25.0 to 39.9% positivity
- Very high = 40.0% positivity or higher
Comparison with previous week cut-offs
Based on the comparison with previous week cut-offs for COVID-19 percent (%) positivity for consistency across indicators related to percent positivity. Local data is too variable and sporadic to establish meaningful cut-offs for influenza alone.
- Lower = A decrease of 5.0% or more
- Similar = A change between -4.9% and 4.9%
- Higher = An increase of 5.0% or more
