목적: To analyze the incidence of pharyngeal reflux in laryngopharyngeal reflux (LPR) patients over a 24-hour period and find out the basic timing of pharyngeal reflux. 방법:This was an observational, retrospective case study. We reviewed 69 patients who visited our clinic with LPR-related symptoms and were proven to have pharyngeal reflux via 24-hour hypopharyngeal- esophageal multichannel intraluminal impedance pH monitoring. Quantitative analysis was conducted for the LPR profiles, such as the acidity of reflux, nighttime reflux, and positional reflux. The time series of pharyngeal reflux episodes and mealtimes were analyzed over a 24-hour period. 결과:The quantitative analysis revealed that pharyngeal reflux occurred 4.88 ± 4.59 times over 24 hours. Weakly acidic pharyngeal reflux was more abundant than acidic or weakly alkaline reflux. Pharyngeal reflux occurred mainly during daytime in the upright position. The time-series analysis indicated that pharyngeal reflux occurred more frequently in the post-prandial period than in the pre-prandial period. 결론:The basic timing of pharyngeal reflux in patients with LPR was post- prandial and daytime in the upright position.