Study design and hypotheses
In this two‐arm, multi‐site randomized controlled trial (RCT), participants were randomized to the intervention arm or the usual care arm. Outcomes were measured at 12 months. For those in the control arm (usual care), the intervention was offered after completion of the 12 month outcome measures. All participants who had not undergone RRSO were contacted at 24 months to collect information on RRSO scheduling and/or completion.We hypothesized that women who received the follow‐up theoretically‐guided behavioral telephone genetic counseling intervention would have higher uptake of RRSO at 1 year compared to women who received usual care. We also hypothesized that at 1 year after receiving the intervention, women would have lower decisional conflict and cancer‐related distress, and higher knowledge levels compared to women who received usual care. We also evaluated an exploratory aim recognizing that booking a gynecological consult, electing for surgery, and booking surgery may take longer than 1 year. For this exploratory aim, we hypothesized that 2 years after randomization, those who received the intervention would have higher uptake of RRSO compared to those who received usual care. The trial was approved by Research Ethics Boards at all participating centres.