Evaluating the De-Escalation of Surveillance for Patients Who Have Undergone Curative Treatment for Primary Breast Cancer (De-Escalation)

This study began in 2025 at the Breast Centre in Beaumont RCSI Cancer Centre. We expect that around 600 people will take part. If you agree to join the study, you will be placed into one of two groups:

• One group will continue with the usual follow-up plan after breast cancer treatment. This includes regular hospital visits for up to five years.
• The other group will follow a new plan, where hospital visits will stop after two years, but yearly mammograms will continue as normal.
• Participants will continue to have access to the breast care team by the usual contact points such as your breast care nurse. All patients following treatment of breast cancer in Beaumont hospital are provided with a direct phone number to contact the breast care nurse should they have any concern.

Participants won't need to take any new medicines or treatments. Each year, we'll ask you to complete a short questionnaire (either in person or over the phone) to tell us how participants are feeling and how the follow-up process is working for them.

This will help the researchers understand whether the new follow-up plan is just as safe and possibly more convenient for patients.

Participants will be placed into one of two groups, this will be chosen at random (like flipping a coin). Both groups will be followed for a total of five years after their breast cancer treatment.

Group 1 - Current Follow-Up Plan (Usual Care):

• Continue with the current schedule of hospital clinic visits at: 6, 12, 18, 24, 36, 48 and 60 months after your treatment
• Be invited for your annual mammogram as normal
• Be asked to fill in a short questionnaire at your clinic visits at 24, 36, 48, and 60 months. This will help us understand how you're feeling and your experience with follow-up care
• All your appointments will take place in person at the Breast Centre in Beaumont Hospital.

Group 2 - New Follow-Up Plan (Study Group):

• Attend clinic visits at: 6, 12, 18, and 24 months after treatment
• Be discharged from hospital clinics after 2 years
• Continue to have your annual mammogram as normal
• Fill in the same questionnaire at 24 months in person, and then by telephone at 36, 48 and 60 months
• If you are in this group and ever feel you would prefer to return to hospital clinic visits, you will be supported to do so.

No extra hospital visits, medical tests, or blood samples are required for this study. The questionnaire may ask about your health, daily activities, and how you feel about the follow-up care you are receiving. Some people may find questions about quality of life or cancer follow-up a little emotional or upsetting, but you can skip any question you don't want to answer. Researchers may look at medical records to check information about diagnosis, treatment, and follow-up care. This will be done confidentially, and only by members of the research team who are trained to handle personal health information safely.