RT Journal Article T1 Mid-regional pro-adrenomedullin, methemoglobin and car-boxyhemoglobin as prognosis biomarkers in critically ill pa-tients with COVID-19: an observational prospective study A1 Oblitas, Christian Mario A1 Galeano Valle, Francisco A1 Ramírez Navarro, Jesús A1 López Cano, Jorge A1 Monterrubio Manrique, Ángel A1 García Gámiz, Mercedes A1 Sancho González, Milagros A1 Arenal López, Sara A1 Álvarez-Sala Walther, Luis Antonio A1 Demelo Rodríguez, Pablo AB Mid-regional pro-adrenomedullin (MR-proADM), methemoglobin (MetHb), and carboxyhemoglobin (COHb) levels have been associated with sepsis. In this study, we assessed the role of this potential biomarkers in critically ill COVID-19 patients. Outcomes were mortality and a combined event (mortality, venous or arterial thrombosis, and orotracheal intubation (OTI)) during a 30-day follow-up. A total of 95 consecutive patients were included, 51.6% required OTI, 12.6% patients died, 8.4% developed VTE, and 3.1% developed arterial thrombosis. MetHb and COHb levels were not associated with mortality nor combined event. Higher MR-proADM levels were found in patients with mortality (median of 1.21 [interquartile range-IQR-0.84;2.33] nmol/L vs. 0.76 [IQR 0.60;1.03] nmol/L, p = 0.011) and combined event (median of 0.91 [IQR 0.66;1.39] nmol/L vs. 0.70 [IQR 0.51;0.82] nmol/L, p < 0.001); the positive likelihood ratio (LR+) and negative likelihood ratio (LR−) for mortality were 2.40 and 0.46, respectively. The LR+ and LR− for combined event were 3.16 and 0.63, respectively. MR-proADM ≥1 nmol/L was the optimal cut-off for mortality and combined event prediction. The predictive capacity of MR-proADM showed an area under the ROC curve of 0.73 (95% CI, 0.62–0.81) and 0.72 (95% CI, 0.62–0.81) for mortality and combined event, respectively. In conclusion, elevated on-admission MR-proADM levels were associated with higher risk of 30-day mortality and 30-day poor outcomes in a cohort of critically ill patients with COVID-19. PB MDPI SN 1999-4915 YR 2021 FD 2021-12-06 LK https://hdl.handle.net/20.500.14352/129437 UL https://hdl.handle.net/20.500.14352/129437 LA eng NO Oblitas CM, Galeano-Valle F, Ramírez-Navarro J, López-Cano J, Monterrubio-Manrique A, García-Gámiz M, Sancho-González M, Arenal-López S, Álvarez-Sala Walther L, Demelo-Rodríguez P. Mid-regional pro-adrenomedullin, methemoglobin and car-boxyhemoglobin as prognosis biomarkers in critically ill pa-tients with COVID-19: an observational prospective study. Viruses. 2021;13(12):2445. https://doi.org/10.3390/v13122445 DS Docta Complutense RD 20 ene 2026