Fig. 2

Diagnostic values for sepsis patients estimated by receiver operating curve (ROC) analysis. a For clinical variables in non-surgically treated patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for C-reactive protein (CRP) was 0.697 (95 % CI 0.620–0.767, P < 0.001), procalcitonin (PCT) 0.698 (95 % CI 0.620–0.768, P < 0.001), interleukin-6 (IL-6) 0.522 (95 % CI 0.441–0.602, P = 0.713), white blood cells (WBC) 0.525 (95 % CI 0.445–0.604, P = 0.676), body temperature 0.511 (95 % CI 0.431–0.591, P = 0.851) and sepsis-related organ failure assessment (SOFA) 0.587 (95 % CI 0.507–0.664, P < 0.001). b For calculated score in non-surgically treated patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for calculated score was 0.745 (95 % CI 0.670–0.810, P < 0.001). c For clinical variables in non-surgically treated patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for C-reactive protein (CRP) was 0.762 (95 % CI 0.683–0.830, P < 0.001), procalcitonin (PCT) 0.810 (95 % CI 0.734–0.871, P < 0.001), interleukin-6 (IL-6) 0.503 (95 % CI 0.415–0.591, P = 0.953), white blood cells (WBC) 0.486 (95 % CI 0.390–0.582, P = 0.775), body temperature 0.478 (95 % CI 0.382–0.575, P = 0.659) and sepsis-related organ failure assessment (SOFA) 0.684 (95 % CI 0.600–0.769, P < 0.001). d For calculated score in non-surgically treated patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for calculated score was 0.836 (95 % CI 0.764–0.893, P < 0.001). e For clinical variables in newly hospitalized sepsis patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for C-reactive protein (CRP) was 0.805 (95 % CI 0.705–0.882, P < 0.001), procalcitonin (PCT) 0.868 (95 % CI 0.778, 0.931, P < 0.001), interleukin-6 (IL-6) 0.601 (95 % CI 0.490–0.705, P = 0.102), white blood cells (WBC) 0.482 (95 % CI 0.354–0.610, P = 0.774), body temperature 0.505 (95 % CI 0.378–0.632, P = 0.940) and sepsis-related organ failure assessment (SOFA) 0.781 (95 % CI 0.679–0.863, P < 0.001). f For calculated score in newly hospitalized sepsis patients: Area under the curve (AUC) for a null hypothesis was 0.5. AUC for calculated score was 0.896 (95 % CI 0.812–0.952, P < 0.001)