Length of hospital stay had negative correlation with SpO2 (r = 0.33, p = 0.005), eosinophils (r = −0.25, p = 0.035), monocytes (r = −0.23, p = 0.048), albumin (r = −0.32, p = 0.006), and positive correlation with T2DM (r = 0.24, p < 0.045), the need for oxygen supply (r = 0.43, p = 0.002) and community-acquired pneumonia (r = 0.27, p = 0.020). This evidence concerns the gene ALB and type 2 diabetes mellitus.