Th2 cytokines and IgE levels were decreased in the sera of patients with CRS-FA after the sinus surgery. Th1/Th2 cytokines and specific IgE were measured with ELISA as detailed in the text. Bars represent levels of cytokines or IgE in the sera. Data are expressed as mean ± SD. *, p < 0.05, compared with values of the 1st tests (before surgery).