IL5 and asthma: A receiver operating characteristic (ROC) revealed a sensitivity of 67.1% for IL-12 (p40) and 66.5% for IL-5 and specificity of 66.7% for IL-12 (p40) and 58.3% for IL-5 serum levels to distinguish between the extrinsic and intrinsic asthma phenotype in children (Figure 2 A and B).