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BACKGROUND Urinary tract infections (UTIs) can be caused by multiple drug-resistant bacteria. Empirical broad-spectrum antibiotics help minimize the risk of disease progression. Although antibiotic de-escalation is important to reduce resistance, adverse drug effects, and costs, few studies have evaluated the impact of antibiotic de-escalation on complicated UTIs in hospitalized patients. METHODS In this retrospective cohort single center observational study conducted over a period of 1 year at Prince Sultan Military Medical City (PSMMC),