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Ontario Health Study

Ontario Institute for Cancer Research and partner institutions

HDB-0384

The Ontario Health Study is a longitudinal cohort of 225,000 Ontario participants with health questionnaires, biological samples (blood, urine, DNA), physical measurements, and MRI scans collected since 2010. Researchers access ready-to-use epidemiological and clinical datasets through a formal data access application process.

Category

IPD repository

Access

By application

Region

Canada — Canada

Coverage

225,000 Ontario residents, 2010-present

Data types

cohort-data, biosamples, health-questionnaires, imaging-data

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Record HDB-0384 · last verified 2026-08-23 · listed in IPD repositories

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