Figure 2. Model Performance When Identifying Days of Therapy of Antimicrobials During the Encounter by Age, Location, Antimicrobial Group, and Input Variable Feasibility Tier.

A, Model output for adult encounters. B, Model output for pediatric and neonatal encounters. Each data point represents a unique model built based on location, feasibility tier of variables used, antimicrobial group, and adult or pediatric populations. The closer the mean absolute error is to 0, the better the model was at estimating the number of days of antimicrobial therapy. Some location strata in the analysis of pediatric encounters were too small to fit a model. In these scenarios, only estimates for the “all locations” category were reported. Antimicrobial groups and agents are listed in eTable 1 in the Supplement. BL indicates beta-lactam; CDI, Clostridioides difficile infection risk agents; CO, community onset; and ICU, intensive care unit.