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Communicable diseases standardized rates per 1,000 population

Communicable Disease Rates

CD Rates - Age and Gender Standardized


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Data include all new communicable diseases (CD) cases reportable to the Regional Health Authority under the Public Health Act, Reportable Disease Regulations, excluding reportable sexually transmitted infections (Chlamydia, gonorrhea, syphilis), HIV/AIDS and tuberculosis.

Rates are based on case counts of CD per annum (calendar year) and represent confirmed cases by case status date. The rate is the number of cases per 1,000 population.

Incidence rates are comprised of the total number of new cases (numerator) divided by the total SHR covered population in the neighbourhood represented (denominator), expressed per 1,000 population. See Denominator Description below for definition of Covered Population. Rates are age and sex standardized using the Canadian 1991 population. Age/sex standardization is a method that adjusts for the age and sex distribution in a neighbourhood and allows for comparisons between neighbourhoods with different demographics.

Method of Calculation

The number of people with CD with a valid postal code for a given Saskatoon neighbourhood, divided by the number of people in the covered population with valid postal codes for the Saskatoon neighbourhood multiplied by 1,000.

Limitations

Neighbourhood rates based on case counts under five are suppressed. Standardized rates are based on case counts among residents of SHR, excluding those registered with First Nations and Indian Health (FNIH). Covered population include registered Indians. This means rates will be slightly under-estimated. Rates over time are sensitive to physician testing patterns but generally under-represent the true occurrence of infections.

Usage Considerations

High rates of CD do not necessarily reflect significant differences, but may be a function of low denominators. Confidence intervals are not presented here. Results were then age and sex standardized to the 1991 Canadian Census Population.