In pediatric patients, vancomycin plays a pivotal role in combating infections, necessitating precise therapeutic drug monitoring to ensure efficacy and safety. The adoption of model-informed precision dosing (MIPD) has demonstrated potential in optimizing dosing strategies based on the area under the concentration-time curve (AUC ). However, predictive performance of population pharmacokinetic models using only trough concentrations to estimate AUC has not been evaluated.