Prevalence of laryngopharyngeal reflux in health annual check-up population at HRH Princess Maha Chakri Sirindhorn Medical Center


  • Pannipa Wiriyaamornchai Department of Otolaryngology, Faculty of Medicine, Srinakharinwirot University
  • Pisit Wanichakorntrakul Department of Otolaryngology, Faculty of Medicine, Srinakharinwirot University
  • Panuwat Wongwattana Department of Otolaryngology, Faculty of Medicine, Srinakharinwirot University


laryngopharyngeal reflux, health checkup, reflux symptom index


Laryngopharyngeal reflux (LPR) is commonly diagnosed in otolaryngology clinic and negatively effects to the quality of life. This study aims to establish the prevalance of laryngopharyngeal reflux in health check up population at HRH Princess Maha Chakri Sirindhorn medical center and identify associated factors. The study design is a cross-sectional study. The data was collected from 1st June to 31st December 2013. All subjects were given the reflux symptom index (RSI) in Thai version. The validity and reliability assessment of RSI Thai version were 0.85 and 0.86. The RSI score greater than 13 is suggestive for laryngopharyngeal reflux.
There were total of 165 subjects, including 58 males (35.2%) and 107 females (64.8%). The age were ranged from 18-81 years old (mean±SD: 44±14) and mean BMI were 24.3 kg/m2. Mean RSI were 6.7. Twenty-four subjects reported RSI >13 (14.5%), which included 15 females (9%) and 9 males (5.5%). Thirty-seven subjects reported alcohol drinking (37%), 14 reported smoking (8.5%) and 110 had history of tea and coffee drinking (66.7%). In conclusion, the study showed that the prevalence of laryngopharyngeal reflux was 14.5%. Factors affecting laryngopharyngeal reflux included smoking. Meanwhile, factor not associated with laryngopharyngeal reflux included sex, BMI, alcohol drinking and tea-coffee drinking


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