Moreover, COVID-19 patients with ARDS had lower levels of lymphocytes (0.53 × 109 /L, IQR: 0.40–1.07 vs 1.03 × 109 /L, IQR: 0.78–1.52) and serum albumin (ALB: 29.4 g/L, IQR: 26.5–33.0 vs 33.7 g/L, IQR: 29.9–36.5) than COVID-19 patients without ARDS. Here, ALB is linked to acute respiratory distress syndrome.