Figure. Raw Trends in Patient Medical Advice Requests and Patient Call Messages (Weighted Average, per Physician, per Day) by Specialty, Ambulatory Visit Volume, and Type, March 2018 to June 2021.

Missing data are indicated by dashed lines and black dots. Findings are from modeling by piecewise linear regression of patient medical advice request trend using a spline for month with a single knot at March 2020 and Huber-White SEs.