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Multi-variate robust Poisson regression: unadjusted and adjusted relative risk (RR) of factors associated with in-hospital death at a COVID-19 reference hospital in North-east Brazil. (A) Analysis with quick sequential organ failure assessment (SOFA) score (2220 patients included). (B) Analysis with SOFA score (658 patients included). CI, confidence interval; SpO2, peripheral capillary oxygen saturation; FiO2, fraction of inspired oxygen ratio.
