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Considerations
for data production > Healthy Canadians >
45-HTL: Mortality rate for stroke
Definition
Rationale and notes for interpretation
Technical specifications
Data availability
Considerations for indicator quality and comparability
Responsibility to produce the data
The number of deaths of individuals where the underlying cause of death is one of those specified, per 100,000 population, that would be observed in the population if it had the same age composition as the reference or "standard" population.
Age-standardized cancer or AMI or cerebrovascular disease death rate trends may indicate long-term success in reducing deaths from these diseases, compared with other provinces and countries. Lower death rates indicate success in cancer or cardiovascular disease prevention, detection, and treatment.
| Exclusions: |
Deaths of non-residents of Canada. |
| Calculation: |
The age-standardized death rate for each cancer site (colon/rectum, female breast, and prostate) and for acute myocardial infarction and cerebrovascular disease is calculated by multiplying each observed age-specific death rate by the standard population in the corresponding age-group, summing the results, multiplying the sum by 100,000 and then dividing the product by the total standard population. The 1991 Canadian Census population is used as the standard population.
Causes of death are classified according to the ICD-9 from 1979 to 1999. The year 2000 and subsequent years available are coded to ICD-10. The selected causes are presented here with corresponding codes from each ICD revision. |
| Cause |
ICD-9 |
ICD-10 |
Impact of ICD-10 |
| Colorectal cancer |
153-154 |
C18-C21 |
- |
| Lung cancer |
162 |
C33-C34 |
2% decrease |
| Breast cancer |
174 |
C50 (and specify sex=F) |
- |
| Prostate cancer |
185 |
C61 |
3.3% increase |
| Acute myocardial infarction |
410 |
I21-I22 |
2.7% decrease |
| Cerebrovascular disease |
430-438 |
I60-I69 * |
6.9% increase |
| Selected cerebrovascular diseases ** |
430-432, 434, 436 |
I60-I66 |
? |
* I60-I69 does not include a category comparable to ICD-9 code 435, transient cerebral ischemia (ICD-10 G45)
** PIRC refers to "all stroke" for this subset which is not an accurate description. The STC Vital Statistics classification experts would refer to this unconventional grouping as "selected cerebrovascular diseases". |
| Source: |
Statistics Canada, Vital Statistics, and Demography Division; ISQ. |
| References: |
Statistics Canada Vital Statistics Death Databases. |
- Age-standardized mortality rate is reported per 100,000 (1991 Canadian Census standard population) and to one decimal place, though attention should also be drawn to any qualifications on data quality provided by Statistics Canada/ISQ.
- Age-standardized mortality rate is reported for each sex separately where applicable.
- Results from the most recent mortality data available at the national level (2001) are reported.
- Over 20 years of data (1979-2001) available for Canada, the Provinces and the Territories, however, the time series comparability is broken by the implementation of ICD-10 for 2000 data.
Note regarding comparable reporting over time: From 1979 to 1999, the underlying cause of death was coded using ICD-9; beginning with 2000, the underlying cause of death was coded using ICD-10, thus introducing discontinuity to the trend data. To help users interpret the impact of the conversion, i.e., the extent to which it affects comparability, a sample of the data for 1999 were also coded to ICD-10. Bridge coding reveals a significant impact on comparability (break in series) for lung cancer and prostate cancer death, unintentional injuries, AMI, and cerebrovascular disease deaths due to the implementation of ICD-10.
Statistics Canada
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