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Indicator Metadata

NameInfluenza Immunization for Seniors
Short/Other Names

Not applicable

DescriptionThe percentage of persons age 65 and older who report that they had their last influenza immunization (flu shot) less than one year ago
InterpretationHigh results are desirable.
HSP Framework Dimension

Health System Outputs: Appropriate and effective

Areas of Need

Staying Healthy

Geographic Coverage

All provinces/territories

Reporting Level/Disaggregation

National, Province/Territory, Region

Indicator Results

Accessing Indicator Results on Your Health System: In Depth

Identifying Information
NameInfluenza Immunization for Seniors
Short/Other Names

Not applicable

Indicator Description and Calculation
DescriptionThe percentage of persons age 65 and older who report that they had their last influenza immunization (flu shot) less than one year ago
Calculation: DescriptionNumber of respondents age 65 and older who received influenza immunization (flu shot) less than one year ago, divided by the total number of survey respondents age 65 and older
Calculation: Geographic Assignment

Place of residence

Calculation: Type of Measurement

Percentage or proportion

Calculation: Adjustment Applied

None

Calculation: Method of Adjustment

Not applicable

Denominator

Description:
Survey respondents age 65 and older who responded to the question

Numerator

Description:
Respondents age 65 and older who report that they have been immunized for influenza within the past year

Background, Interpretation and Benchmarks
Rationale

It has been recognized for many years that people age 65 and older are at greater risk of serious complications from the flu compared with young, healthy adults.

Every year, up to 20,000 Canadians are hospitalized as a result of influenza illness. It is estimated that between 4,000 and 8,000 persons, mostly seniors, die from pneumonia or pneumonia-related complications each year. This is because human immune defenses become weaker with age. For this reason, seniors age 65 years and older are advised to get influenza vaccine each year.

Interpretation

High results are desirable.

HSP Framework Dimension

Health System Outputs: Appropriate and effective

Areas of Need

Staying Healthy

Targets/Benchmarks

Not applicable

References

An Advisory Committee Statement (ACS) and National Advisory Committee on Immunization (NACI). Statement on Seasonal Influenza Vaccine for 2011-2012. Canada Communicable Disease Report. Ottawa, ON: Public Health Agency of Canada; 2011. Available at http://www.phac-aspc.gc.ca/publicat/ccdr-rmtc/11vol37/acs-dcc-5/index-eng.php. Accessed September 12, 2016.

Schanzer DL, Tam TW, Langley JM, Winchester BT. Influenza attributable deaths, Canada 1990-1999. Epidemiol Infect. 2007;135(7):1109-1116. PM:17306052.

Center for Disease Control and Prevention on What You Should Know and Do this Flu Season If You Are 65 Years and Older. Available at http://www.cdc.gov/flu/about/disease/65over.htm. Accessed September 12, 2016.

Statistics Canada. Health Trends. Statistics Canada Catalogue No. 82-213-XWE. Ottawa. Released December 12, 2013. http://www12.statcan.gc.ca/health-sante/82-213/index.cfm?Lang=ENG. Accessed September 12, 2016.

Health Link BC. Why Seniors Should get the inactivated flu (influenza) vaccine; 2013. Available at http://www.healthlinkbc.ca/healthfiles/hfile12a.stm. Accessed September 12, 2016.

Availability of Data Sources and Results
Data Sources

CCHS, Statistics Canada

Available Data Years

Type of Year:
Calendar
First Available Year:
2003
Last Available Year:
2014

Geographic Coverage

All provinces/territories

Reporting Level/Disaggregation

National, Province/Territory, Region

Result Updates
Update Frequency

Every year

Indicator Results

Web Tool:
Your Health System: In Depth
URL:
Accessing Indicator Results on Your Health System: In Depth

Updates

Not applicable

Quality Statement
Caveats and Limitations

Regional-level results for Nova Scotia are not available. In 2014, the Health Authorities Act passed by the Nova Scotia legislature consolidated the 10 district health authorities into 2 (1 provincial health authority with 4 management zones, and the IWK Health Centre). Canadian Community Health Survey (CCHS) data was not available for the new health authority boundaries.

The data year reflects the CCHS survey cycle. Prior to 2007, data for the CCHS was collected every 2 years, involving a sample of 130,000 respondents. In 2007, the survey transitioned to a yearly collection cycle, involving a sample of 65,000 respondents.

Some values have data quality flags that indicate "use with caution" or "suppressed" due to high coefficients of variation: health regions with small populations and results disaggregated by age group or sex within small regions.

The 2-year combined data is less current than annual estimates but has higher precision (less variability). Users should refer to the annual CANSIM Table 105-0501 as the primary source for the most current estimates from the CCHS, as well as to obtain data from previous years. However, where data quality flags indicate suppression (F) or higher variability (E), the 2-year CANSIM Table 105-0502 should be used. Self-reported data is subject to bias.

The CCHS covers the population age 12 and older living in the 10 provinces and 3 territories. Excluded from the survey's coverage are the following:

–Persons living on reserves and other Aboriginal settlements in the provinces

–Full-time members of the Canadian Forces

–The population of institutionalized persons

–Persons living in 2 Quebec health regions: Nunavik Health Region and Terres-Cries-de-la-Baie-James Health Region

Altogether, these exclusions represent less than 3% of the target population.

In the North, the frame for the CCHS covers 92% of the target population in Yukon, 96% in the Northwest Territories and 92% in Nunavut. Before 2013, coverage in Nunavut was 71%.

Trending Issues

Not applicable

Comments

The 2009 data on flu shots may include H1N1 vaccines received in fall 2009. In 2010, the word "seasonal" was added to the questions in order to collect the two types of vaccines separately.

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