Figure 2
Receiver-operating characteristic curve (ROC) for white blood cells and neutrophil counts in inflamed appendicitis patients. a) ROC for white blood cells in inflamed appendicitis patients. Area under curve (AUC) is 0.704 (standard error, 0.055; 95% CI =0.655-0.749). White blood cell count ideal cutoff value was 9,400 ×103 cells/mm3; this yields sensitivity of 75.4% and specificity of 65.5%. b) ROC for neutrophils count in inflamed appendicitis patients. AUC was 0.664 (standard error, 0.056; 95% CI = 0.614-0.712). Neutrophils count ideal cutoff value was 8.080 × 103 cells/mm3, this cutoff value yields sensitivity of 65.4% and specificity of 69.0%.