Statistics Canada methodology
For health regions in all provinces/territories except for Quebec and British Columbia, the method is that of Statistics Canada, described below. These estimates are based on census data and on population estimates by census division (CD) produced by Demography Division.
- Population universe
- Method for deriving demographic estimates by health regions (HR)
Population estimates at the census division (CD) level are produced annually by Demography Division, using the component method, which accounts for changes in the number of births and deaths, as well as intra-provincial, inter-provincial and international migration. The CD population estimates are prorated to the provincial population estimates.
Demographic estimates by health region are derived from these estimates using the following steps:
Calculation of conversion factors:
Health Statistics Division has created a file linking dissemination areas (DAs), census subdivisions (CSDs) and census divisions (CDs) for each health region.
The 2006 Census population by CDs ( DAs or CDs in case of split CDs) was adjusted for late changes in geography and for partially enumerated Indian reserves to ensure DAs added up to the CD.
In cases where health regions split CDs, the proportion of population in each CD split is used to derive 'conversion factors' in order to allocate the CD level estimate to the appropriate health region.
- Application of conversion factors to CDdemographic estimates:
- Evaluation of the method
To assess the quality of demographic estimates by HR, two evaluations were performed. First, an estimate was produced for July 1, 2006 with a postcensal CD demographic estimate based on the 2006 Census which was compared with the 2006 Census counts. This comparison indicated that the conversion factors were providing results comparable with the census counts by HR.
Second, the same method was also used to generate estimates for 2006 by HR from a postcensal CDestimate based on the 2001 Census. The results were compared with the actual 2006 counts as derived from the 2006 Census, thereby allowing an evaluation of the accuracy of the method over a five-year period. The results indicated that the methodology adequately accounted for the demographic changes.
For more information on the method used to produce health region or CD estimates, contact Client Services (toll–free 1–866–767–5611; 613–951–2320; fax: 613–951–2307; mailto(email@example.com), Demography Division.
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