CYGB and susceptibility to pneumonia measurement: In model 2, patients with elevated HGB had higher incidences of pneumonia (OR 2.14, 95%CI 1.25–3.66, p = 0.006), DVT (OR 2.63, 95%CI 1.31–5.31, p = 0.007), and unfavorable outcomes at 90 days (OR 2.13, 95%CI 1.17–3.89, p = 0.013), compared to patients with standard HGB.