The number of failed organs was classified into 3 grades: grade 1 (no failed organs; EPIC score 0–2), grade 2 (1 failed organ; EPIC score 3–4), and grade 3 (2 failed organs; EPIC score 5–7). A McNemar–Bowker value of 47.966 was obtained (df = 3, P < .001). Kappa analysis indicated that EPIC score correlated weakly with the number of failed organs (Kappa = 0.214, P < .001). Spearman correlation analysis revealed a moderate correlation of EPIC scores with the number of failed organs (r = 0.343, P < .01).