Journal of the Korean neurological association (대한신경과학회지)

Korean Neurological Association (대한신경과학회)
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The Reliability and Validity of the Korean Versions of the International Restless Legs Scale and the Restless Legs Syndrome Quality of Life Questionnaire

한국판 국제하지불안척도와 하지불안증후군 삶의 질 설문지의 신뢰도 및 타당도 연구

  • Yang, Jun-Gyu (Department of Neurology, Dongsan Medical Center, Keimyung University School of Medicine) ;
  • Kim, Do-Hyung (Department of Neurology, Dongsan Medical Center, Keimyung University School of Medicine) ;
  • Lee, Joo-Hwa (Department of Neurology, Dongsan Medical Center, Keimyung University School of Medicine) ;
  • Park, Ki-Hyung (Department of Neurology, Gachon University of Medicine and Science, Graduate School of Medicine, Gil Medical Center) ;
  • Jung, Ki-Young (Department of Neurology, Korea University Medical Center, Korea University College of Medicine) ;
  • Shin, Won-Chul (Department of Neurology, Kyunghee University, East-West Neo Medical Center) ;
  • Cho, Yong-Won (Department of Neurology, Dongsan Medical Center, Keimyung University School of Medicine)
  • 양준규 (계명대학교 의과대학 신경과학교실) ;
  • 김도형 (계명대학교 의과대학 신경과학교실) ;
  • 이주화 (계명대학교 의과대학 신경과학교실) ;
  • 박기형 (가천의과학대학교 길병원 신경과) ;
  • 정기영 (고려대학교 의과대학 신경과학교실) ;
  • 신원철 (경희대학교 의과대학 동서신의학병원 신경과) ;
  • 조용원 (계명대학교 의과대학 신경과학교실)
  • Received : 2010.05.13
  • Accepted : 2010.07.05
  • Published : 2010.11.01
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Abstract

Background: The International Restless Legs Scale (IRLS) and the Restless Legs Syndrome Quality of Life questionnaire (RLSQoL) are valid and reliable tools for assessing RLS severity and the impact of RLS on daily life in Western countries. The purpose of this study was to validate the Korean versions of these questionnaires in Korean RLS patients. Methods: We developed the Korean versions of the IRLS and the RLSQoL. In total, 250 Korean primary RLS patients were included in this study. These questionnaires were used for the initial interview and a subsequent retest approximately 1 month later. The findings were compared with those obtained using the Clinical Global Impression, Short Form 36 Health Survey, and other instruments. The percentage agreement and Cronbach's alpha were calculated for each question, and the validity coefficients were estimated from these statistics. Results: The scores for the Korean versions of the IRLS (range: 0-40) and the RLSQoL (range 0-100) proved reliably consistent (Cronbach's alpha=0.96 and 0.92, respectively) and had good test-retest reliability (intraclass correlation coefficient=0.61-0.85 and 0.61-0.89, respectively). The Korean version of the RLSQoL could be used to distinguish between groups with none, mild, moderate, severe, and very severe symptoms (F=66.10, P<0.0001). The two questionnaires proved to have high reliability and validity coefficients. Conclusions: The Korean versions of the IRLS and the RLSQoL are valid and reliable tools for assessing RLS severity and the impact of RLS on the daily life of Korean RLS patients.

Keywords

References

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