Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

The University of Oxford is required to keep the data collected about you for at least 25 years after the end of the study. The end of the study is when the last health information is collected about study participants - this may be 20 years after the end of the scheduled GP data collection and the main results are analysed.