Figure 3
Receiver-operating characteristic curve (ROC) for white blood cells and neutrophil counts in complicated appendicitis patients. a) ROC curve for white blood cell count in complicated appendicitis patients. Area under curve (AUC) was 0.763 (standard error, 0.058; 95% CI = 0.670-0.840). White blood cell count ideal cutoff value was 11.100 × 103 cells/mm3, this cutoff value yields sensitivity of 75.4% and specificity of 65.5%. b) ROC curve for neutrophils count in complicated appendicitis patients. AUC was 0.749 (standard error, 0.060; 95% CI = 0.656-0.828). Neutrophils count ideal cutoff value was 7.540 × 103 cells/mm3, this cutoff value yields sensitivity of 81.8% and specificity of 65.5%.