ALOX15 and chronic rhinosinusitis with nasal polyps: Based on the optimal cut-off value of -0.778 for the combination of ALOX15 mRNA and blood eosinophils, the CRSwNP patients were divided into a high combination level group (values ≥ -0.778, n = 30) and a low combination level group (values < -0.778, n = 18).