J Korean Neurol Assoc.
2007 Nov;25(4):494-499.
The Reliability and Validity of the Korean Version of Paradigm of Questions for Epidemiology Studies of Restless Legs Syndrome and the Johns Hopkins Telephone Diagnostic Interview Form for the Restless Legs Syndrome
- Affiliations
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- 1Department of Neurology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea.
- 2Department of Preventive Medicine, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea.
- 3Department of Neurology, Inha University Hospital, Incheon, Korea.
- 4Department of Neurology, Kyunghee University, East-West Neo Medical Center, Seoul, Korea.
- 5Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
- 6Department of Neurology, Hanyang University Hospital, Seoul, Korea.
- 7Korean Sleep Society, Korea. neurocho@dsmc.or.kr
Abstract
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BACKGROUND: There are two questionnaires available for the diagnosis of restless legs syndrome (RLS); Paradigm of questions for epidemiology studies of RLS, and the Johns Hopkins telephone diagnostic interview form (JHTDIF) for the RLS. The purpose of this study was to validate the Korean version of these questionnaires and to evaluate their usefulness.
METHODS
We developed the Korean version of the RLS questionnaire proposed for epidemiology and the JHTDIF for the RLS. A total of 96 participants (34 RLS, 62 non-RLS) were included in this study. These questionnaires were used for the interview with a retest approximately a month later. These results were compared with the clinical diagnosis. Kappa value, percent agreement, and Cronbach's Alpha were calculated for each question and validity coefficients were estimated from these statistics.
RESULTS
The Kappa values of the Korean version in the RLS questionnaire for epidemiology studies were 0.794 for the 1st test, and 0.745 for the retest. The Kappa values of the Korean version in the Johns Hopkins telephone diagnostic interview for the RLS were 0.883 for the 1st test, and 0.834 for the retest. The two questionnaires proved to have high Kappa values and validity coefficients. Two forms were found to have a high test-retest reliability (r=0.927, 0.958).
CONCLUSIONS
The Korean version of the RLS questionnaire proposed for epidemiology and the JHTDIF for the RLS could be a reliable and valid tool for screening patients with RLS in Korea.
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