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. 2021 Nov 9. Online ahead of print. doi: 10.1016/j.clinbiochem.2021.11.001

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© 2021 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.

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Fig. 2 — Variance importance matrix plot of variables collected in the first 24 hours of intensive care unit for artificial neural network in patients with COVID-19. ALB, mass concentration of albumin in plasma; BIL, substance concentration of bilirubin in plasma; CA, substance concentration of calcium(II) in plasma; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration glomerular filtration rate; CL, substance concentration of chloride in plasma; CREA, substance concentration of creatinine; CRP, mass concentration of C-reactive protein in plasma; Days_ adm_hos_ICU, number of days from hospital admission to ICU admission; Days_sym_adm_hos, number of days between appearance of clinical symptoms and admission to the hospital; Days_sym_adm_ICU, number of days between appearance of clinical symptoms and admission to the ICU; DD, mass concentration of D-dimer in plasma; FERRI, mass concentration of ferritin in plasma; GLU, substance concentration of glucose in plasma; LDH, catalytic concentration of lactate dehydrogenase in plasma obtained within the first admission day; K, substance concentration of potassium ion in plasma; PT, relative time of prothrombine in plasma; NA, substance concentration of sodium ion in plasma; TROP-T, mass concentration of troponin T in plasma; UREA, substance concentration of urea in plasma; paCO₂, partial pressure of carbon dioxide in arterial blood; paO₂, partial pressure of oxygen in arterial blood; apH, pH in arterial blood; aSatO₂, substance fraction of oxygen in arterial blood, paO₂/FiO₂, partial pressure of oxygen in arterial blood/fraction of inspired oxygen quotient value; #BAS, number concentration of basophiles in blood; %BAS, number fraction of basophiles in the leucocytes of the blood; #EOS, number concentration of eosinophils in blood; %EOS, number fraction of eosinophils in the leucocytes of the blood; LEU, number concentration of leucocytes in blood; #LYM, number concentration of lymphocytes in blood; %LYM, number fraction of lymphocytes in the leucocytes of the blood; #MON, number concentration of monocytes in blood obtained; %MON, number fraction of monocytes in the leucocytes of the blood; #NEU, number concentration of neutrophils in blood; %NEU, number fraction of neutrophils in the leucocytes of the blood; PLT, number concentration of platelets in blood; MPV, entitic volum of platelets in blood (mean platelet volume); ERY, number concentration of erythrocytes in blood; HGB, mass concentration of haemoglobin in blood; HCT, volume fraction of erythrocytes in blood (haematocrit); MCV, entitic volum of erythrocytes in blood (mean corpuscular volume); MCH, entitic mass of haemoglobin contained in the erythrocytes of the blood (mean corpuscular haemoglobin); MCHC, mass concentrarion of haemoglobin contained in the erythrocytes of the blood (mean corpuscular haemoglobin concentration); relative distibution width of the erythrocytic volume in the erythrocytes of the blood (red blood cell distribution width).