BIBLIOGRAFÍA 1. Arancibia HF, Díaz PO. [ Severe community-acquired pneumonia in adults ]. Revista chilena de infectologia : organo oficial de la Sociedad Chilena de Infectologia . 2005;22 Suppl 1:s46-51. 2. Murillo-Zamora E, Medina- Gonzalez A, Zamora- Perez L, Vazquez-Yanez A, Guzman -Esquivel J, Trujillo- Hernandez B. Performance of the PSI and CURB-65 scoring systems in predicting 30-day mortality in healthcare-associated pneumonia . Med Clin ( Barc ). 2018;150(3):99-103. 3. Bilan N, Dastranji A, Ghalehgolab Behbahani A. Comparison of the spo2/fio2 ratio and the pao2/fio2 ratio in patients with acute lung injury or acute respiratory distress syndrome . J Cardiovasc Thorac Res. 2015;7(1):28-31. 4. Chen W, Janz DR, Shaver CM, Bernard GR, Bastarache JA, Ware LB. Clinical characteristics and outcomes are similar in ARDS diagnosed by oxygen saturation /Fio2 ratio compared with Pao2/Fio2 ratio. Chest . 2015;148(6):1477-83. 5. Khemani RG, Thomas NJ, Venkatachalam V, Scimeme JP, Berutti T, Schneider JB, et al. Compariso of SpO2 to PaO2 based markers of lung disease severity for children with acute lung injury . Critical care medicine. 2012;40(4):1309-16. 6. Mandell LA. Community-acquired pneumonia : An overview . Postgraduate medicine. 2015;127(6):607-15. 7. Hecker M, Sommer N, Tello K, Hecker A, Seeger W, Mayer K. [ Community-acquired pneumonia ]. Medizinische Klinik , Intensivmedizin und Notfallmedizin . 2018;113(4):313-24. 8. Metlay JP, Waterer GW, Long AC, Anzueto A, Brozek J, Crothers K, et al. Diagnosis and treatment of adults with community-acquired pneumonia . An official clinical practice guideline of the American Thoracic Society and Infectious Diseases Society of America . American journal of respiratory critical care medicine.2019;200(7):e45-e67. 19. Lambden S, Laterre PF, Levy MM, Francois B. The SOFA score- development , utility and challenges of accurate assessment in clinical trials . Critical care (London, England ). 2019;23(1):374.