RT Journal Article T1 Plasma Levels of Mid-Regional Proadrenomedullin Accurately Identify H1N1pdm09 Influenza Virus Patients with Risk of Intensive Care Admission and Mortality in the Emergency Department. A1 Valenzuela-Méndez, Blanca A1 Valenzuela-Sánchez, Francisco A1 Rodríguez-Gutiérrez, Juan Francisco A1 Bohollo-de-Austria, Rafael A1 Estella, Ángel A1 Martínez-García, Pilar A1 González-García, María Ángela A1 Rello, Jordi K1 CRP K1 H1N1 influenza pneumonia K1 ICU admission K1 MR proadrenomedullin K1 biomarkers K1 ferritin K1 procalcitonin K1 sepsis K1 virus AB Early identification of severe viral pneumonia in influenza virus A (H1N1pdm09) patients is extremely important for prompt admission to the ICU. The objective is to evaluate the usefulness of MR-proadrenomedullin (MR-proADM) compared to C reactive protein (CRP), procalcitonin (PCT), and ferritin in the prognosis of influenza A pneumonia. This prospective, observational, multicenter study included one hundred thirteen patients with confirmed influenza virus A (H1N1pdm09) admitted to an Emergency Department and ICUs of six hospitals in Spain. Measurements and Main Results: one-hundred thirteen patients with confirmed influenza virus A (H1N1pdm09) were enrolled. Seventy-five subjects (mortality 29.3%) with severe pneumonia caused by influenza A H1N1pdm09 virus (H1N1vIPN) were compared with 38 controls (CG).The median MR-proADM levels at hospital admission were 1.2 nmol/L (IQR (0.8-2.6) vs. 0.5 nmol/L (IQR 0.2-0.9) in the CG (p = 0.01), and PCT levels were 0.43 μg/L (IQR 0.2-1.2) in the H1N1vIPN group and 0.1 μg/L (IQR 0.1-0.2) in the CG (p 1.2 nmol/L at hospital admission were significant predictive factors for ICU and 90-day mortality (HR: 1.3). Conclusions: the initial MR-proADM, ferritin, CRP, and PCT levels effectively determine adverse outcomes and risk of ICU admission and mortality in patients with influenza virus pneumonia. MR-proADM has the highest potency for survival prediction. SN 2075-4426 YR 2022 FD 2022-01-10 LK http://hdl.handle.net/10668/21370 UL http://hdl.handle.net/10668/21370 LA en DS RISalud RD Apr 7, 2025