Table 1

Cohort development

Study arm 1:
First Nations cohort
Study arm 2:
Metis cohort
Study arm 3:
Inuit cohort
The cohort will include all registered First Nations people living in Manitoba at any point from 1 January 2020 to the end of the study.The cohort will include all Metis living in Manitoba at any point from 1 January 2020 to the end of the study.The cohort will include all Inuit living in Manitoba at any point from 1 January 2020 to the end of the study.
Registered First Nations people will be identified using the Manitoba First Nations Research File, cross-referenced with four other datasets that include information on First Nations identity (see table 2 for details). All individuals who are identified as First Nations (or who have self-identified as First Nations) in at least one of these five datasets will be included in the cohort. Additionally, we will include all mothers of First Nations people in the cohort using existing mother-child linkages in the repository.Metis citizens will be identified using the Manitoba Metis Registry.Inuit will be identified using data collected by the Manitoba Inuit Association for an ongoing administrative data study. These data are already housed at the Manitoba Centre for Health Policy.
The comparison group will comprise all other Manitobans, including Metis and Inuit.The comparison group will comprise all other Manitobans, including First Nations and Inuit.The comparison group will comprise all other Manitobans, including First Nations and Metis.