Figure 1
Receiver-operating characteristic curve (ROC) for white blood cells and neutrophil counts in all appendectomy patients. a) ROC for white blood cells in all appendectomy patients. ROC for white blood cell count of all appendectomy patients. Area under the curve (AUC) was 0.701 (standard error, 0.055; 95% CI =0.671-0.755). Ideal white blood cell count cutoff value was 9,400 cells/mm3, this yields sensitivity of 76.8% and specificity of 65.5%. b) ROC for neutrophils count of all appendectomy patients. AUC is 0.680 (standard error, 0.056; 95% CI = 0.635-0.722). Neutrophils count ideal cutoff value was 7.540 ×103 cells/mm3, this yields sensitivity of 71.0% and specificity of 65.5%.