Figure. Multinomial Logistic Regression of Changes in Antibiotic Use Among Patients With Penicillin Allergies.

Odds ratio of a patient with penicillin allergy receiving a course of antibiotic treatment, by category, at the intervention site before vs after removal of a warning against cephalosporin use from the electronic health record compared with odds ratios of patients without a penicillin allergy and those at the comparison site receiving the treatment in those periods. Whiskers indicate 95% CIs; vertical line represents a ratio of ratios of rate ratios of 1.0, indicating no change in antibiotic use (compared with other groups) after the removal of the warning.