This study has been designed as a randomized controlled trial including women invited to a national screening program for breast cancer in Norway, BreastScreen Norway in 2025. The program invites women aged 50-69 to biennial screening mammography. The study includes two substudies with the intervention of sending an SMS notification three days prior to the screening appointment in the first substudy and two days prior to the screening appointment in second study. The comparison is made between the study groups, where women are sent an SMS notification two or three days prior to their scheduled screening appointment and the control groups where women will not be sent an SMS notification about a scheduled screening appointment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SCREENING
Masking
NONE
Enrollment
133,770
Available in the NCCR and sent an SMS notification three or two days prior to a scheduled screening appointment
Norwegian Institute of Public Health
Oslo, Oslo County, Norway
Screening attendance
Attendance after a routine or reminder invitation, with and without an SMS notification
Time frame: Three months (180 days) after scheduled date for a screening examination following a routine invitation or three months (180 days) after a reminder was posted.
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