ALB and COVID-19: Adjusted for age, sex, BMI and comorbidities, the logistic regression models revealed that patients whose nucleic acid turned negative within 14 days had lower LDH, CRP and higher ALB, patients with heavier severity COVID-19 had higher AST, LDH, CRP, PCT and lower ALB, and with hospital stay > 31 days had a lower CRP(P < 0.05) (Table 4).