The following maps show statistics based on causes of death, such as cancer or cardiovascular diseases. Each group is divided into two sub-groups: SMR (standardized mortality ratio) and PYLLI (potential years of life lost index).
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SMR (Standardized Mortality Ratio)The ratio of the number of deaths occurring to residents of a geographic area to the expected number of deaths in that area based on provincial age-specific mortality rates. Within our maps, a value greater than 1 indicates that the LHA experienced a greater number of deaths than expected. A value less than 1 indicates that the LHA experienced fewer deaths than expected.
PYLL (Potential Years of Life Lost)The number of years of life lost when a person dies before a specified age (75 years). All deaths are assumed to occur at the midpoint of five-year age groups. This technique considers the age of death rather than the event of death, as it assigns different weights to deaths that occur at different moments of life.
Island Health uses geographical information systems (GIS) to map health statistics. The type of map we use is called a choropleth map. Read more