Mean scores and symptoms of each reflux symptom index question in the participants
| Characteristic | Mean score±SD | Moderate or more severe symptoms prevalence (%) |
| Sore throat | 0.86±1.207 | 69 (9.4%) |
| Sputum production | 1.31±1.422 | 146 (19.9%) |
| Excessive secretions | 1.25±1.476 | 137 (18.7%) |
| Dysphagia | 0.87±1.309 | 92 (12.5%) |
| Coughing after eating, sleeping or laying down | 1.22±1.519 | 133 (18.1%) |
| Breathing difficulties | 1.07±1.409 | 113 (15.4%) |
| Extreme coughing episodes | 1.16±1.541 | 131 (17.9%) |
| A sense of a foreign body in throat | 1.17±1.457 | 112 (15.3%) |
| Epigastric burning sense, chest pain, indigestion, GORD | 1.69±1.643 | 199 (27.1%) |
| Total | 10.50±9.022 | – |
GORD, gastro-oesophageal reflux.