For Participants

Complete the Questionnaire

Get started now if you have been invited to complete the new questionnaire. The questionnaire for the current round of follow up (follow up 3) is the shortest questionnaire yet and only takes 10-15 minutes to complete!

Update Contact Details

The ABC Study is a long-term study so it’s important you keep your contact details up to date. Please update your details by logging in, or by notifying us via the form below.

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Participant Information

This information provides details for those taking part in the ABC Study.

Understand more about your participation

Frequently Asked Questions

Find answers to common questions about the ABC Study, including participation, data privacy, study findings, and technical support. Whether you need help logging in, updating your details, or understanding the latest research, this section provides the key information you need.

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