Fig. 4

The serum levels of IL-5 (A, D), POSTN (B, E) and IL-33 (C, F) in CRSwNP patients with mild to severe stage of the disease according to L–M evaluation of CT imaging (A–C) and clinical symptomps evaluated by VAS (D–F). *p < 0.05; **p < 0.01; ***p < 0.001