Study population

Women aged ≥ 40 years eligible for national cancer screening in the relevant year who read the study participant recruitment brochure and read and signed the Participant Information Sheet and Informed Consent Form will be recruited in this study. Women must meet all the following inclusion criteria to be enrolled in the study: eligible for national cancer screening in the relevant year and visited the site for breast cancer screening, provided consent for study participation using the informed consent form, and completed a study questionnaire. Participants who met any of the following criteria were excluded from the study: history of or current breast cancer, current pregnancy or planned pregnancy over the next 1 year, history of breast surgery (mammoplasty or insertion of a foreign substance such as paraffin or silicon), and underwent mammography for diagnostic purposes (Supplementary Data 1).