Back to Top

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.

Blood tubes in the laboratory centrifuge

New Study activities coming for OHS participants, says Dr. Victoria Kirsh

Aug 26, 2025 // Study Updates

Dr. Victoria Kirsh, an epidemiologist with more than two decades of research experience, is the new Principal Investigator and Interim Director of the Ontario Health Study. Read more in the July 2025 Ontario Health Study Newsletter

News Image

The Ontario Health Study Newsletter, July 2025

Jul 21, 2025 // OHS Newsletter

In this issue: • Ushering in a new era of data-driven health research • How have you been lately? • Update on additional blood collection • National study of heart and brain health includes OHS participants • Keeping your contact information up to date • Your data at work • They asked a cancer researcher

News Image

Women Face Greater Heart Disease Risk from Lifestyle Factors Than Men, Study Finds

Apr 15, 2025 // Study Updates

A new study using OHS data has found that common lifestyle and health factors such as diet, exercise, smoking, and blood pressure have a stronger impact on cardiovascular risk in women than men. The study, led by Dr. Maneesh Sud of Sunnybrook Health Sciences Centre in Toronto, used data which tracked the incidence of heart

News Image