OBJECTIES: To inestigate and compare the prealence of pharyngeal reflux (PR) eents in normal controls and patients with clinically diagnosed reflux laryngitis.

• 目的：调查研究咽部返流事件在正常对照组和临床上诊断为返流性喉炎的患者组中的发生频率，并且对两组的发病率进行比较。