Characteristics of Laryngopharyngeal Reflux in Patients with Chronic Cough Induced by Gastroesophageal Reflux Disease.

Objective: To summarize the characteristics of laryngopharyngeal reflux in patients with chronic cough induced by gastroesophageal reflux disease (GERD). Materials and Methods: The clinical data of patients with chronic cough induced by GERD treated at our hospital were retrospectively analyzed, including their reflux symptom index (RSI), reflux finding scores (RFS), and results of oropharyngeal pH monitoring. Results: There were 44 patients in total, including 21 males and 23 females. The average history of chronic cough was 29.60 (29.60 ± 37.60) months. In addition to coughing, all patients had at least 2 symptoms of laryngopharyngeal reflux disease (LPRD), and their RSI averaged 15.66 (15.66 ± 6.33). The most frequent symptoms were cough, throat clearing, excessive phlegm, or postnasal drip. All patients had LPRD signs, with an average RFS of 10.89 (10.89 ± 2.81). The most frequent signs were erythema or hyperemia/vocal cord edema, posterior commissure hypertrophy, and diffuse laryngeal edema. There were 42 patients (42/44, 95.45%) whose RSI and/or RFS were abnormal. Oropharyngeal pH monitoring identified 10 patients (10/44, 22.72%) with abnormal Ryan scores. Conclusions: All patients with chronic cough induced by GERD had symptoms and signs of LPRD, and most of them had an abnormal RSI and/or RFS and could be diagnosed with suspect LPRD. A part of the patients had LPR episodes according to Dx-pH monitoring, most of which occurred in the upright position. These results indicated that most patients with chronic cough induced by GERD may have suspected LPRD simultaneously and that cough was one of their LPRD symptoms.