Nasal allergen provocation test in nasal polyposis with and without allergy

Methods Four groups of patients (n=48) underwent nasal allergen provocation test for grass pollen. We included 12 patients with allergic rhinitis based on grass allergy, 12 patients with CRSwNP without grass allergy, 12 patients with CRSwNP with grass allergy, and 12 control patients. The diagnosis of grass allergy was based on skin prick test and RAST. The test was positive based on change in nasal airflow measured by active anterior rhinomanometry and symptoms. In annex, VAS scores were performed before and after NAPT.