In addition, results at the time of admission revealed that severe COVID-19 was associated with lower lymphocyte counts (1.28 (0.87, 1.77) × 109/L versus 0.82 (0.63, 1.37) × 109/L, P = .001) and total protein (TP) (70.85 (65.45, 76.83) g/L versus 54.05 (60.95, 65.88) g/L, P < .001), albumin (ALB) (44.30 (38.33, 49.60) g/L versus 28.50 (26.30, 33.15) g/L, P < .001), and creatine kinase levels (65.00 (48.10, 98.75) U/L versus 39.50 (22.75, 116.00) U/L, P = .011) compared to common COVID-19. Here, ALB is linked to COVID-19.