Outcomes
SENTINEL NODE
Questionnaire data were collected between August 2017 and March 2021 either electronically or on paper (based on patient preference) at baseline and at 6, 12, and 18 months after diagnosis. The primary outcome was psychological distress, as measured using the Distress ThermometerBaseline data were collected on demographic characteristics (age: <60 or ≥60 yearsFrom medical records, we obtained information on breast surgery (lumpectomy, mastectomy, or mastectomy with primary reconstruction), axillary surgery (axillary dissection or sentinel node biopsy), adjuvant radiotherapy (no or yes), adjuvant endocrine therapy (no or yes), chemotherapy (adjuvant, neoadjuvant, or none), and trastuzumab (no or yes). Additionally, nurse registrations on intervention exposure (3 single items) and patient-reported acceptability (7 single items) were obtained in the intervention group.