2.1 Design and participants
We conducted a retrospective control study among patients with AR and AH
in the XX Hospital. Participants enrolled from Jan 2020 to Jan 2021. AR
patients were diagnosed with a positive skin prick test and the
diagnosis was based on the Allergic Rhinitis and its Impact on Asthma
guidelines [6]. AH was diagnosed by ear, nose, and
throat specialists based on history and endoscopic physical
examination[3]. The adenoid size was recorded
using fiberoptic nasal endoscopy by assessing the percentage of choanal
obstruction: grade I: 0 to 25%; grade II: 26 to 50%; grade III: 51 to
75%; and grade IV: 76 to 100% [7]. Detailed
history of allergic conditions was obtained for each patient. This study
was approved by the ethics committee of XX University (XJT2020- J112).