IGHE and asthma: In addition to basic characteristics and comorbidities, the data in this study comprised preoperative nasoendoscopy, NP and LM scores, exhaled nitric oxide (eNO), blood eosinophil count (B‐eos), serum immunoglobulin E concentration (S‐IgE), serum allergen‐specific IgE measurements, Sniffin’ Sticks Screening 12 Test (SST‐12) and Health‐Related Quality of Life (HRQoL) of the upper and lower airways (SNOT‐22, Asthma Control Test [ACT] and 15D).