Main outcome measures
The Korean version of the Sniffin’ stick II (KVSS-II) was used to perform the olfactory function test. A visual analog scale and the Korean version of the Mini-Mental State Examination (K-MMSE) were used to assess nasal and psychological functions. Three months after the baseline examination, all subjects were reviewed using endoscopy and the KVSS-II..
The baseline LM score, POSE score, visual analogue scale (VAS) for olfactory ability, and KVSS II score (threshold, discrimination, identification) were collected. The LM scoring system was used to compare preoperative status. Likewise, the POSE scoring system was used for the comparison of postoperative status. Olfactory function was evaluated using KVSS-II. The LM score was used to describe the CT findings. This score ranges from 0 (complete lucency of all sinuses) to 24 (complete opacity of all sinuses).15