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What’s New With the OHS?

Since 2010, the Ontario Health Study (OHS) has been working hard to build a platform for chronic disease research. Working together with the research community and Ontarians across the province we are now following the health of about 225,000 people and have collected more than 40,000 blood samples. We’re building a database of health information and a biobank so researchers can better understand the link between genetics, lifestyle and environment—and the role they play in our health.

In this section, you’ll find information about the various Study activities and upcoming initiatives.

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Study Updates

Boosting Immunity Insights: Collaborative Canadian Effort Contributes to Nationwide COVID-19 Immunity Study

Aug 14, 2023 // Study Updates

TORONTO, Monday, August 14, 2023 – Today, CanPath (the Canadian Partnership for Tomorrow’s Health) has contributed to the first peer-reviewed publication showcasing pan-Canadian seroprevalence estimates – published in the Canadian Medical Association Journal (CMAJ). Seroprevalence refers to how many people across Canada developed antibodies in response to infection or vaccination. Studies like this give us an idea

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Provincial Variation in Colorectal Cancer Screening Adherence in Canada; evidence from the Canadian Partnership for Tomorrow’s Health (CanPath)

Jul 24, 2023 // Study Updates

Data from more than 158,000 Canadians, including almost 80,000 OHS participants, were used to examine why so few Canadians follow recommended screening guidelines for colorectal cancer, even though regular screening is shown to reduce incidents of the disease or death. Based on self-reported data from online questionnaires, it turns out only 47.7 percent of the

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Time spent in the sun and the risk of developing non-Hodgkin lymphoma: a Canadian cohort study

Jul 24, 2023 // Study Updates

A study used data from almost 80,000 Canadians, including almost 6,000 OHS participants, to research the link between sun exposure and the risk of developing Non-Hodgkin Lymphoma (NHL). The research found that moderate daily exposure (30 minutes to two hours) was associated with a lower risk of developing this category of cancer. The authors noted

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