Translation and validation of the Korean Version of the Reflux Symptom Score

To assess the validity and reliability of the Korean version of the reflux symptom score (K-RSS). The English version of the RSS was translated into Korean and completed by 77 people (44 and 33 people in the patient group and control group, respectively). They completed the K-RSS (K-RSS-1) and reflu...

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Bibliographic Details
Published in:Journal of voice 2024-03, Vol.38 (2), p.545.e1-545.e8
Main Authors: Min, Hye Kyu, Jeon, So Young, Lechien, Jerome R, Park, Jung Min, Park, Hwanhee, Yu, Jung-wan, Kim, Suk, Jeong, Su Jin, Kang, Jung wook, Su il, Kim, Young chan, Lee, Eun, Young-Gyu, Ko, Seong-Gyu
Format: Article
Language:English
Subjects:
Korean version
Laryngopharyngeal reflux
Reflux symptom score
Reliability
Validity
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Summary:To assess the validity and reliability of the Korean version of the reflux symptom score (K-RSS). The English version of the RSS was translated into Korean and completed by 77 people (44 and 33 people in the patient group and control group, respectively). They completed the K-RSS (K-RSS-1) and reflux symptom index (RSI) questionnaires and answered questions about age, sex, underlying disease, smoking history, and alcohol and coffee consumption. They completed the K-RSS once more (K-RSS-2) after 1 – 2 weeks. Internal consistency was evaluated using Cronbach's α and test-retest reliability using the intraclass correlation coefficient (ICC). External validity was evaluated using the Spearman rank test between the RSI and K-RSS. The Mann-Whitney U test was used to assess internal validity by comparing the K-RSS-1 scores between the patient and control groups. The most common symptoms were globus sensation, throat clearing, and throat pain. The K-RSS reported high internal consistency (α = 0.894). The ICC for the total score was 0.883, indicating excellent test–retest reliability. According to the Spearman analysis, there was a significant correlation between the total score of the K-RSS and that of the RSI (rs = 0.902; P < 0.001), demonstrating strong external validity. Furthermore, the patient group showed significantly higher values than the control group in all K-RSS scores, suggesting high internal validity. The K-RSS is a patient-reported outcome questionnaire with excellent criterion-referenced validity and ideal reliability.
ISSN:0892-1997
1873-4588
DOI:10.1016/j.jvoice.2021.08.026