Table 1.

Study Design

Study design	Retrospective cohort
Participants	Patients newly diagnosed with breast cancer March 17-May 17, 2019 and March 17-May 17, 2020
Data sources	• Institutional breast cancer tracking database • Electronic health records
Data collection	• Database queries • Chart review
Outcomes	• Patient characteristics • Tumor characteristics • Consultation type, timing • Treatment type, timing

Retrospective cohort study comparing patients newly diagnosed with breast cancer March 17, 2019 – May 17, 2019 to patients diagnosed March 17, 2020 – May 17, 2020