Extended Data Table 3.

Regression of Physician Expertise Level, Patient Skin Color, and DLS Assistance on Diagnostic Accuracy

Ordinary Least Squares regressions with robust standard errors clustered on physician participants. This regression includes only board-certified dermatologist (BCD) and primary-care physician (PCP) participants. We code the Specialist, Dark Skin, AI Assistance binary variables as follows: Specialist equals 1 for BCDs and 0 for PCPs, Dark Skin equals 1 for FST 5 and 6 and 0 for FST 1 to 4, and AI Assistance equals 1 for participant responses with access to the DLS prediction and 0 for participant responses before access to the DLS predictions. The coefficients represent the change in the dependent variable for a one-unit change in the independent variable while holding everything else constant. The numbers in parentheses are standard errors indicating the variability of coefficient estimates. *, **, and *** indicates the p-value from the ordinary least-squares regression is less than 0.05, 0.01, and 0.001.