Does geography matter in mortality? An analysis of potentially avoidable mortality by remoteness index in Canada

Abstract

Background: The avoidable mortality rate is a key indicator of overall health and health care utilization. However, the avoidable mortality rate may differ by the relative remoteness of a community. Avoidable mortality rates specific to remote areas cannot be investigated unless there is a clear geographic classification of remoteness. Therefore, this research uses a newly developed remoteness index to explore the geographic variability of avoidable mortality in Canada.

Data and methods: The remoteness index, Canadian Vital Statistics-Death Database (2011 to 2015), and the 2016 Census of Population are used to understand the geographic variability of preventable and treatable mortality rates in Canada. Descriptive and multivariate data analysis techniques are used to test the hypothesis that remoteness is one of the statistically significant predictors of avoidable mortality rates in Canada.

Results: There is a clear gradient of preventable and treatable mortality rates by relative remoteness. The preventable and treatable mortality rates are significantly higher in more remote areas than in easily accessible areas. The remoteness index is a good predictor of both preventable and treatable causes of mortality for low-Aboriginal census subdivisions but not for high-Aboriginal census subdivisions in Canada.

Discussion: Both preventable and treatable mortality rates vary significantly by remoteness, despite Canada's universal health care system. The remoteness of Canadian communities may have affected health care delivery and utilization.

Keywords: Aboriginal population; Remoteness; education; health outcome; health status; income; preventable mortality; treatable mortality.