Predictive value of blood eosinophil count and serum total immunoglobulin E for type 2 chronic rhinosinusitis according to allergic sensitization status.

Blood eosinophil count and blood eosinophil percentage, but not serum total IgE, were positively correlated with tissue eosinophil count, regardless of allergic sensitization.

Consistently, the area under the curve (AUC) values for blood eosinophil count in ROC analyses were comparable across the total cohort and the allergic and non-allergic groups and remained stable across different histologic definitions of T2 chronic rhinosinusitis.