The control is a static survivorship care plan template in PDF format that includes information similar to what an oncologist currently provides as "standard of care."

An 8 item list of continuing care services adapted from the CanSORT Provider Roles Scale (iCanCare Study) is used to assess participants' preferences for seeing their Oncologist or PCP.

The percentage of patients who have scheduled a follow-up visit with their PCP after viewing the CCC web tool (intervention arm) or after receiving the static survivorship care plan (control arm).

A 5-point scale will be used to ask patients to rate their satisfaction with the coordination of care provided by their Oncologist and PCP. The rating scale will range from a value of 1 ('not at all') to a value of 5 ('extremely satisfied'), with a higher numeric value representing greater satisfaction with coordination of care. The mean satisfaction scores will be compared between the intervention and control arms.

Communication with PCP about provider roles was measured using an item adapted to the patient perspective from a prior study of providers' views about shared cancer care roles. Patients were asked if they communicated in the past 3 months with their PCP about who will manage specific aspects of their survivorship care (yes/no).

Knowledge about team-based survivorship care was measured utilizing an 8-item scale adapted from the Perceived Primary Care Delivery of Survivorship Care Scale. It includes items specific to patients' knowledge of PCPs roles in team-based care delivery, (e.g. second cancer screening, symptom management). The responses were rated on a 5-point Likert scale ranging from 1 (strongly disagree) to 5 (strongly agree). The responses to the 8 items were then averaged to create a mean knowledge summary score for each participant, ranging from 1 to 5, with higher values representing greater knowledge about team-based survivorship care.

Total of all reporting groups

Participants self-reported their breast cancer stage at diagnosis, with response options stage 0, stage I, stage II, stage III and stage IV, with higher values representing a higher stage at diagnosis.

11 participants did not self-report this data.

Acceptability and usability assessed by the following 6 key factors: 1. Ease of use; 2. Helpful during the transition to survivorship; 3. Helpful in terms of planning when to see my PCP and when to see my Oncologist; 4."Would recommend CCC to other patients"; 5. Length of time it took to go through the website; 6. Amount of information on the website. Each of the 6 factors will be assessed using a 5-point (1-5) Likert scale with higher scores (3, 4, 5) representing better acceptance and usability of the CCC website. Based on prior work, a cut off of 50% or more reporting a score of 3 or higher will be used to measure acceptance within each domain. The average of each participant's responses to the 6 items will result in one score per participant, on a scale of 1 - 5. A single summary score of acceptability across all participants will be determined by averaging the individual scores. On a scale of 1-5, a score of 3 or higher indicates acceptability to the majority of participants.

Intervention arm only; participants who completed the follow-up survey at 3 months post-randomization

An 8 item list of continuing care services adapted from the CanSORT Provider Roles Scale (iCanCare Study) is used to assess participants' preferences for seeing their Oncologist or PCP.

The percentage of patients who have scheduled a follow-up visit with their PCP after viewing the CCC web tool (intervention arm) or after receiving the static survivorship care plan (control arm).

A 5-point scale will be used to ask patients to rate their satisfaction with the coordination of care provided by their Oncologist and PCP. The rating scale will range from a value of 1 ('not at all') to a value of 5 ('extremely satisfied'), with a higher numeric value representing greater satisfaction with coordination of care. The mean satisfaction scores will be compared between the intervention and control arms.

Communication with PCP about provider roles was measured using an item adapted to the patient perspective from a prior study of providers' views about shared cancer care roles. Patients were asked if they communicated in the past 3 months with their PCP about who will manage specific aspects of their survivorship care (yes/no).

Participants who saw a PCP after completing the baseline survey are included in the analysis population

Knowledge about team-based survivorship care was measured utilizing an 8-item scale adapted from the Perceived Primary Care Delivery of Survivorship Care Scale. It includes items specific to patients' knowledge of PCPs roles in team-based care delivery, (e.g. second cancer screening, symptom management). The responses were rated on a 5-point Likert scale ranging from 1 (strongly disagree) to 5 (strongly agree). The responses to the 8 items were then averaged to create a mean knowledge summary score for each participant, ranging from 1 to 5, with higher values representing greater knowledge about team-based survivorship care.

ConnectedCancerCare (CCC) is a web-based guide to support survivorship care for women who have been treated for early-stage (stages 0-II) breast cancer. It encourages patients to utilize team-based care by oncologists and primary care physicians and provides them with the information on cancer surveillance, screenings and preventive healthcare during survivorship.