APACHE II score (0 points for 0–14, 1 point for 15–19, and 2 points for ≥30), qSOFA score ≥ 2 (2 points), serum albumin level < 3.4 g/dL (1 point), and infectious or respiratory disease (1 point) were incorporated into risk scoring system for mortality. This evidence concerns the gene ALB and respiratory system disorder.