RT Journal Article T1 Clinical outcomes of carbapenem de-escalation regardless of microbiological results: A propensity score analysis. A1 Sadyrbaeva-Dolgova, Svetlana A1 Aznarte-Padial, Pilar A1 Pasquau-Liaño, Juan A1 Expósito-Ruiz, Manuela A1 Calleja Hernández, Miguel Ángel A1 Hidalgo-Tenorio, Carmen K1 Antimicrobial stewardship programme K1 Carbapenems K1 De-escalation K1 Extended spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae AB The aim of this study was to evaluate the safety and efficacy of de-escalation in patients under treatment with carbapenems and its impact on clinical outcomes. A prospective observational study was conducted for 1year. Patients administered active carbapenems for at least 24h were included. Primary outcomes were in-hospital mortality, mortality at 30 days after carbapenem prescription, and infection-related readmission within 30 days. De-escalation was defined as the substitution of carbapenem with narrower spectrum antimicrobial agents or its discontinuation during the first 96h of treatment. The study included 1161 patients, and de-escalation was performed in 667 (57.5%) of these. In the de-escalation group, 54.9% of cultures were positive. After propensity score matching, 30-day mortality was lower (17.4% vs. 25.7%, p=0.036), carbapenem treatment was 4 days shorter (4 vs. 8 days, p Carbapenem de-escalation is a safe strategy that does not compromise the clinical status of patients. YR 2019 FD 2019-05-07 LK http://hdl.handle.net/10668/13939 UL http://hdl.handle.net/10668/13939 LA en DS RISalud RD Jul 30, 2025