Figure 3From: Distribution of sputum cellular phenotype in a large asthma cohort: predicting factors for eosinophilic vs neutrophilic inflammation Receiver-operating characteristic (ROC) curve for the whole group to determine the blood eosinophil count value that best identified a sputum eosinophilia ≥3%. The optimum cut-off point was 220/mm3 (Sensitivity 77%, specificity: 70%, AUC: 0.790, p < 0.0001).Back to article page