Mohammad, Nik Mohd Yunus
(2015)
Development of Bahasa Malaysia reflux symptom index (M-RSI).
Masters thesis, Universiti Sains Malaysia.
Abstract
Introduction : Reflux Symptom Index (RSI), is a nine-item self-administer questionnaire,
functioned to help clinician to assess the relative degree of Laryngopharyngeal Reflux (LPR)
symptoms during initial evaluation and outcome after treatment.
Objective : The purpose of this study was to develop a Malay version of the RSI (M-RSI) and
to evaluate its validity, concistency and reliability in normal Malaysia population with
suspected LPR.
Materials and methods : This is a prospective study involving a total of 84 patients
presenting to otorhinology and head and neck (ORL-HNS) clinic. It was carried out at
Hospital Universiti Sains Malaysia (HUSM), Kubang Kerian, Kelantan. The developed
Malaysian RSI (M-RSI) was administered to 50 patients with suspected LPR. Internal
consistency and test-retest reliability were evaluated. Then, two group which consists of 17
patients with LPR and other 17 participants from control group were recruited to undergo the
M-RSI questionnaire answering session, laryngeal examination and insertion of the 24 hours
ambulatory pH monitoring. This is to test the validity of the M-RSI questionnaire by
comparing with other tools for diagnosis of LPR including reflux finding score (RFS) by
laryngeal examination and oropharnygeal pH monitoring.
Results : The Malaysian M-RSI showed satisfactory internal consistency (Cronbach’s α =
0.60). Test-retest reliability was assessed using intraclass correlation coefficient (ICC).
Intraclass Correlation Coefficient is 0.727 which is a good correlation between pre and post
assessment. Spearman Rank correlation coefficient is applied to determine the correlation
between the total M-RSI with total RFS, Ryan score upright and Ryan score supine.
Significant correlation is demonstrated between total M-RSI and total RFS (r = 0.80,
p<0.001).
Conclusion: This study shows that Malaysian M-RSI is easily administered, highly
reproducible and demonstrates good clinical validity. It is a valid tool for self-assessment of
LPR that can be used by Malaysian population. Results : The Malaysian M-RSI showed satisfactory internal consistency (Cronbach’s α =
0.60). Test-retest reliability was assessed using intraclass correlation coefficient (ICC).
Intraclass Correlation Coefficient is 0.727 which is a good correlation between pre and post
assessment. Spearman Rank correlation coefficient is applied to determine the correlation
between the total M-RSI with total RFS, Ryan score upright and Ryan score supine.
Significant correlation is demonstrated between total M-RSI and total RFS (r = 0.80,
p<0.001).
Conclusion: This study shows that Malaysian M-RSI is easily administered, highly
reproducible and demonstrates good clinical validity. It is a valid tool for self-assessment of
LPR that can be used by Malaysian population.
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