In terms of all-cause mortality at 28-d, compared with SOFA score (AUC: 0.666, 95%CI: 0.592–0.740), SIRS score (AUC: 0.551, 95%CI: 0.482–0.620), GCS score (AUC: 0.583, 95%CI: 0.518–0.647), RDW (AUC: 0.682, 95%CI: 0.613–0.751) and Alb (AUC: 0.647, 95%CI: 0.567–0.727), RAR had a higher diagnostic efficacy (AUC: 0.703, 95%CI: 0.628–0.777). Here, ALB is linked to systemic inflammatory response syndrome.