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Multimorbidity and mortality in Ontario, Canada: A population-based retrospective cohort study by BL Ryan; B Allen; M Zwarenstein; M Stewart; RH Glazier; M Fortin; SJ Wetmore; SZ Shariff is a Medicine article available to read on EtoBox.

What is Multimorbidity and mortality in Ontario, Canada: A population-based retrospective cohort study about?

## Objective: To examine the relationship between multimorbidity and mortality, and whether relationship varied by material deprivation/rural location and by age. ## Methods: Retrospective population-based cohort study conducted using 2013–14 data from previously created cohort of Ontario, Canada residents classified according to whether or not they had multimorbidity, defined as having 3+ of 17 chronic conditions. Adjusted rate ratios were calculated to compare mortality rates for those with and without multimorbidity, comparing rates by material deprivation/rural location, and by age group. ## Results: There were 13,581,191 people in the cohort ages 0 to 105 years; 15.2% had multimorbidity. Median length of observation was 365 days. Adjusted mortality rate ratios did not vary by material deprivation/rural location; overall adjusted mortality rate ratio was 2.41 (95% CI 2.37–2.45). Adjusted mortality rate ratios varied by age with ratios decreasing as age increased. Overall rate ratio was 14.7 (95% CI 14.48–14.91). Children (0–17 years) had highest ratio, 40.06 (95% CI 26.21–61.22). Youngest adult age group (18–24 years) had rate ratio of 9.96 (95% CI 7.18–13.84); oldest age group

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Author

BL Ryan; B Allen; M Zwarenstein; M Stewart; RH Glazier; M Fortin; SJ Wetmore; SZ Shariff

Published

2020

Language

EN

Field

Medicine (Health Sciences)