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KMID : 1130620130090010026
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Journal of Clinical Neurology
2013 Volume.9 No. 1 p.26 ~ p.31
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Translation and Validation of the Korean Version of the 39-Item Parkinson’s Disease Questionnaire
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Kwon Do-Young
Kim Jae-Woo
Ma Hyeo-Il
Ahn Tae-Beom
Cho Jin-Whan
Lee Phil-Hyu
Chung Sun-Ju
Kim Joong-Seok
Baik Jong-Sam
Koh Seong-Beom
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Abstract
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Background and Purpose: The importance of health-related quality of life (HrQoL) has been increasingly emphasized when assessing and providing treatment to patients with chronic, progressive, degenerative disorders. The 39-item Parkinson’s disease questionnaire (PDQ-39) is the most widely used patient-reporting scale to assess HrQoL in Parkinson’s disease (PD). This study evaluated the validity and reliability of the translated Korean version of the PDQ-39 (K-PDQ-39).
Methods: One hundred and two participants with PD from 10 movement disorder clinics at university-affiliated hospitals in South Korea completed the K-PDQ-39. All of the participants were also tested using the Unified Parkinson’s Disease Rating Scale (UPDRS), Korean version of the Mini-Mental State Examination (K-MMSE), Korean version of the Montgomery-Asberg Depression Scale (K-MADS), Epworth Sleepiness Scale (ESS) and non-motor symptoms scale (NMSS). Retests of the K-PDQ-39 were performed over time intervals from 10 to 14 days in order to assess test-retest reliability.
Results: Each K-PDQ-39 domain showed correlations with the summary index scores (rS=0.559-0.793, p<0.001). Six out of eight domains met the acceptable standard of reliability (Cronbach’s α coefficient ≥0.70). The Guttman split-half coefficient value of the K-PDQ-39 summary index, which is an indicator of test-retest reliability, was 0.919 (p<0.001). All of the clinical variables examined except for age, comprising disease duration, levodopa equivalent dose, modified Hoehn and Yahr stage (H&Y stage), UPDRS part I, II and III, mood status (K-MADS), cognition (K-MMSE), daytime sleepiness (ESS) and (NMSS) showed strong correlations with the K-PDQ-39 summary index (p<0.01).
Conclusions: The K-PDQ-39 has been validated for use in the Korean-speaking PD population. The questionnaire is a valid and reliable assessment tool for assessing the HrQoL of Korean PD patients.
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KEYWORD
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Parkinson’s disease, quality of life, validation
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