Individual Study / OHS
Ontario Health StudyOntario Health Study
The Ontario Health Study (OHS) is a prospective cohort study investigtating environmental, lifestyle, clinical, and molecular and/or genetic risk factors on cancer and other chronic diseases (diabetes, heart disease, asthma, Alzheimer's), in Ontario, Canada.
Overview
- Website
- http://www.ontariohealthstudy.ca/
- Investigators
-
-
Dr. Philip Awadalla
Ontario Institute for Cancer Research
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Dr. Philip Awadalla
- Contacts
-
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Kelly McDonald
Ontario Health Study -
OHS Research Operations & Access Officer
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Kelly McDonald
Design
- General Information on Follow Up (profile, frequency)
- The baseline participants were recruited between 2010 and 2017. A follow-up was performed in 2016-2018 and additional follow-ups are planned in the future.
- Recruitment target
-
- Individuals
- Target number of participants
- 225,000
- Target number of participants with biological samples
- 41,000
Access
Access to external researchers or third parties provided or foreseen for
- Data
- Biosamples
- Other
Marker Paper
Victoria A Kirsh, Kimberly Skead, Kelly McDonald, Nancy Kreiger, Julian Little, Karen Menard, John McLaughlin, Sutapa Mukherjee, Lyle J Palmer, Vivek Goel, Mark P Purdue, Philip Awadalla, Cohort Profile: The Ontario Health Study (OHS), International Journal of Epidemiology, 2022, dyac156
PUBMED 35962976Timeline
Population
OHS population
The OHS cohort consists of men and women aged 18 and older at the time of enrolment residing in the Province of Ontario.
Selection criteria
- Minimum age
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18
- Countries
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- Canada
- Territory
- Ontario
- Supplementary information
- For the Pilot Phase, participants had to come from Mississauga, Owen Sound, or Sudbury.
Sources of recruitment
- General population
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- Volunteer enrolment
- Selected sample
- Participants from existing studies
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- Supplementary Information
- Participants were recruited from the open community and workplaces, through commercial mailing lists and by referrals from friends and family.
Sample Size
- Target number of participants
- 225,000
- Target number of participants with biological samples
- 41,000
- Supplementary information
-
Pilot Phase: 8,205 participants
Baseline Recruitement: 225,000 participants
Follow-Up 1: 47,773 participants
Data Collection Events
| # | Name | Data sources | Data sources - Biosamples | Start | End |
|---|---|---|---|---|---|
| 0 | OHS - Pilot Phase |
|
|
2009 (March) | 2010 (July) |
| 1 | OHS - Baseline Recruitment |
|
|
2010 (September) | 2017 (March) |
| 2 | OHS - Follow-Up 1 |
|
2016 (October) | 2018 (March) |
Participating Studies
| Acronym | Name | Participants | Countries |
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Harmonization Projects Included
| Acronym | Name |
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Datasets
| Name | Type | data-collection-events | Variables |
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Last Update: 2023-04-06T11:57:11.538