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The Development of Sleep Questionnaires Thai Version (ESS, SA-SDQ, and PSQI): Linguistic Validation, Reliability
Background:
The Epworth Sleepiness Scale (ESS), Sleep Apnea Scale of Sleep Disorders Questionnaire (SA-SDQ), and Pittsburgh Sleep Quality Index (PSQI) are widely used in English speaking countries for sleep problem screening. However, there is no officially validated Thai-version of sleep questionnaires available.
Objective:
To provide standard Thai version of three sleep questionnaires and find cut-off level to screening sleep problems in Thai population.
Material And Method:
We used Mapi Research Institute Methods for translation from original language to Thai questionnaire. Then, test-retest reliability analysis was performed. Finally, we collected data from patients who underwent polysomnography in Phramongkutklao Sleep Lab Centre between June and August 2011. Cut-off value to screen population at risk for sleep-related disorder was researched.
Results:
The questionnaires were translated with very good inter-rater agreement. Cut-off of ESS, SA-SDQ, and PSQI suggested sleep disorders would be 9, 27, and 6.5 respectively.
Conclusion:
Sleep disorder questionnaires including ESS, SA-SDQ, and PSQI were translated into Thai with high validity, reliability, and accuracy.
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