Fig. 3

Quarterly Trend in ICU Vancomycin Consumption (DOT/1000 Patient-Days) in a Tertiary Hospital in Alexandria, Egypt from 2019 to 2023. This figure illustrates the quarterly trend in Vancomycin consumption within the intensive care unit (ICU) of a tertiary hospital in Alexandria, Egypt, from January 2019 to December 2023. The downward-sloping regression line (β = − 5.02) reflects a significant reduction in Vancomycin use over time. Abbreviations: DOT/1000PD, days of therapy per 1000 patient-days; β, regression coefficient