CRTH2 expression showed the highest accuracy as a predictor for rNP (Figure 7B, AUC=0.9107) compared with tissue eosinophil number (AUC=0.7354), concomitant asthma (AUC=0.6115), and blood eosinophil number (AUC=0.7083). The gene discussed is PTGDR2; the disease is asthma.