Procedure
RECRUITMENT
Women being offered BC-Predict were sent an invitation letter 1–2 working days after their breast screening invitation letter was sent. The BC-Predict invitation letter was sent along with the participant information sheet and instructions directing prospective participants to the online risk assessment platform. Each invitation letter included details of the participant’s “Date of first offered appointment”. This is the first breast screening appointment date that was offered to the participant. This date was relevant because participants could join the study either before the date of their first offered appointment or up to six-weeks after. After this time, it was not possible for them to login to the BC-Predict risk assessment platform.Once participants consented to the study online via the online form after reading the participant invitation letter and information on consent online and completed the eligibility criteria, they were directed to the BC-Predict risk assessment questionnaire. Participants could answer part of the questionnaire, save, and return at a later date, as long as this occurred within their 6-week recruitment window. Assessment of the online questionnaire during the pilot phase (Once a negative mammography result was provided, risk feedback letters were generated by a member of the study team based on the participant’s answers on their questionnaire and mammographic breast density (calculated from uploaded raw data by VolparaTo assess self-reported harms and benefits, and to inform a subsequent economic analysis, allied studies involved projected sub-samples of 