Ontario 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
- Acronym
- OHS
- Website
- OHS
- Investigators
-
- Contacts
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General Design
- Study design
- Cohort
- Start - End Year
- 2009 -
- 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
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- Individuals
- Number of Participants
- 225,000
- Number of Participants with Biological Samples
- 41,000
Access
Availability of data and biosamples
| Possible Access to Data | |
| Possible Access to Biosamples | |
| Other |
|
Timeline
Population
OHS population
The OHS cohort consists of men and women aged 18 years and older, residing in the province of Ontario.
Selection Criteria
- Minimum age
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18
- Countries
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- Canada
- Canadian Provinces
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- Ontario
- Supplementary Information about selection criteria
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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
- Supplementary Information
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Participants were recruited from the open community and workplaces, through commercial mailing lists and by referrals from friends and family.
Sample Size
- Number of Participants
- 225,000
- Number of Participants with Biological Samples
- 41,000
- Supplementary Information about selection criteria
-
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) | |
| 3 | OHS - COVID-19 questionnaire |
|
2020 (July) | 2020 (October) |
Participating Studies
| Acronym | Name | Study design | Countries |
|---|
Harmonization Initiatives Included
| Acronym | Name |
|---|
Datasets
| Name | Data Collection Events | Variables |
|---|
Areas of Information Collected
- Socio-demographic and economic characteristics
- Death
- Lifestyle and behaviours
- Physical measures and assessments
- Birth, pregnancy and reproductive health history
- Laboratory measures
- Perception of health, quality of life, development and functional limitations
- Cognition, personality and psychological measures and assessments
- Diseases
- Life events, life plans, beliefs and values
- Symptoms and signs
- Preschool, school and work life
- Medication and supplements
- Social environment and relationships
- Non-pharmacological interventions
- Physical environment
- Health and community care services utilization
- Administrative information
Variables Content Summary
Areas of Information Collected
No Areas of Information Collected
No Scales Collected
Areas of Information Collected per per Population and Data Collection Event
No Areas of Information Collected
No Scales Collected
Networks
| Acronym | Name | Harmonization Initiatives | Individual Studies |
|---|
Last Update: 2024-02-27T15:26:18.131