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Your continued involvement in the study is crucial to the success of the CLSA and we value your feedback about your CLSA experience. If you have changed your contact details or would like to share your ideas and suggestions, please access this link.

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CLSA COVID-19 Studies

In response to coronavirus, the CLSA has launched three sub-studies to explore the impacts of the virus.  

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Did you take part in a telephone interview only?

A total of 21,241 people from across Canada have agreed to take part in a telephone interview that takes about 60-90 minutes, once every three years. These participants were selected randomly, and were aged 45 to 85 when first contacted.

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Did you take part in a home interview, and visit a Data Collection Site?

An additional 30,097 people have consented to participate in a 90-minute, in-home interview, and a visit to one of 11 Data Collection Sites across Canada where they took part in a range of physical assessments. These interviews and visits will take place once every three years over the 20-year course of the study.

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Data Collection Sites

For information about each of the CLSA Data Collection Sites across the country, click here.


The CLSA is committed to protecting the privacy of participants, safeguarding the confidentiality of personal information, and ensuring a secure environment for all information collected as part of the study.

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Visit our Frequently Asked Questions webpage for answers to some of the most common queries about the CLSA. If you still have questions, please call us toll free at 1-866-999-8303, or send as an email:

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Information Documents

The CLSA wants to make sure that all of our participants are fully informed about what their participation in the study involves. We have provided links to the information packages and consent forms for the various steps in the study. If you would like to review the questionnaires, please visit the Questionnaires page in the Researchers section.

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Participant Newsletters

For the latest CLSA news and updates, view the Participant Newsletters section.

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