Assessment of LPR
LPR was defined as both RSI score >13 and RFS score >7.
During the initial visit, all the patients filled out RSI questionnaire to evaluate the severity of LPR-related symptoms, which containing 9-item and 0-5 score: the higher the score, the more serious the problem.
The RFS 5 is a useful tool to assess and follow-up LPR patients, which contains 8 items for judging severity of laryngoscopic findings. The laryngoscopy were reviewed by an otolaryngologist blinded to patient RSI and PSG information. They rated 8 items from 0 (normal) to 4 (severe problem) according to laryngoscopic findings.