Ontario Health Study (OHS)
The OHS is one of seven cohorts that form the Canadian Partnership for Tomorrow's Health (CanPath) consortium. OHS aims to engage participants in ongoing data collection over their lifespan. Adult residents of Ontario aged 18 years and over were eligible to participate and had to be sufficiently proficient in English or French. Compared to the Ontario population aged 18 years and over, the study population is overrepresented for women (61% vs. 51%), overrepresented for adults with a university degree (77% vs. 55%), and underrepresented for minority populations (20% vs. 33%), including immigrants (21% vs. 33%). The OHS is geographically diverse, with proportional representation from urban and rural areas across Ontario’s public health units.
Study design
Cohort
Number of participants at first data collection
225 620 (participants)
Age at first data collection
≥18 years (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2010
Primary Institutions
Ontario Institute for Cancer Research (OICR)
Links
maelstrom-research.org/study/ohs
ontariohealthstudy.ca/for-researchers/data-linkage-opportunities/
Profile paper DOI
Funders
COVID-19 Immunity Task Force (CITF)
Canadian Institutes of Health Research (CIHR, Instituts de recherche en santé du Canada, IRSC)
Canadian Partnership Against Cancer (Partenariat Canadien Contre Le Cancer, CPAC)
Genome Canada
Ontario Health
Ongoing?
Yes
Data types collected
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Self-completed questionnaire – online
- None
- None
- Geographic, spatial & environmental data
- Healthcare data
- Mortality data
- Other government data
Engagement
Keywords
Consortia and dataset groups
