F2 and diabetes mellitus: Many variables on admission were consistently predictive of both ventilation need and in-hospital mortality, including male sex, diabetes mellitus, cancer, admission vital signs including diastolic blood pressure, respiratory rate, SpO2, and SpO2:FiO2 ratio, lower levels of albumin and eGFR, and elevated absolute neutrophils, anion gap, activated partial thromboplastin and prothrombin time, blood urea nitrogen (BUN), C-reactive protein (CRP), creatinine, d-dimer, eGFR, plasma glucose, neutrophil to lymphocyte ratio, procalcitonin, and troponin T (high sensitivity).