Procalcitonin and Cellulitis: Cohort Study of the Correlation of Procalcitonin Blood Levels With the Severity and Outcome in Patients With Limb Cellulitis

The size of the correlation coefficient is the degree of correlation between procalcitonin and a variable; the p value gives the degree of statistical likelihood that this correlation is true. *95% CI 0.486, 0.638 Figure 2. Primary outcome and ROC curves of neutrophil:lymphocyte ratio, procalcitonin, total affected area and C-reactive protein A ROC curve with high sensitivity and high specificity would have a large area under the curve (AUC) and the optimum value would be close to the upper left corner of the chart.