IGHE and diabetes mellitus: The following factors were determined pre-operatively: age, sex, primary or revision surgery, presence/absence of polyps, Likert scale scores for nasal discharge and nasal obstruction, relative onset latency and duration of odor detection response in the IVO test, detection and recognition score in the T & T olfactory test, Lund-Mackay computed tomography (CT) score, IgE (IU/mL), percentage and number of eosinophils, presence/absence of allergic rhinitis, asthma, and diabetes mellitus, current smoking status, and Brinkman smoking index.