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Brief communication Evaluating the Validity and Reliability of the Korean Version of the Scales for Outcomes in Parkinson’s Disease–Cognition
Jinse Park1orcid , Eungseok Oh2orcid , Seong-Beom Koh3corresp_iconorcid , In-Uk Song4orcid , Tae-Beom Ahn5orcid , Sang Jin Kim6orcid , Sang-Myung Cheon7orcid , Yoon-Joong Kim8orcid , Jin Whan Cho9orcid , Hyeo-Il Ma10orcid , Mee Young Park11orcid , Jong Sam Baik12orcid , Phil Hyu Lee13orcid , Sun Ju Chung14orcid , Jong-Min Kim15orcid , Han-Joon Kim16orcid , Young-Hee Sung17orcid , Do Young Kwon18orcid , Jae-Hyeok Lee19orcid , Jee-Young Lee20orcid , Ji Seon Kim21orcid , Ji Young Yun22orcid , Hee Jin Kim23orcid , Jin Yong Hong24orcid , Mi-Jung Kim25orcid , Jinyoung Youn9orcid , Hui-Jun Yang26orcid , Won Tae Yoon27orcid , Sooyeoun You28orcid , Kyum-Yil Kwon29orcid , Su-Yun Lee30orcid , Younsoo Kim9,31orcid , Hee-Tae Kim32orcid , Joong-Seok Kim4orcid , Ji-Young Kim33orcid

DOI: https://doi.org/10.14802/jmd.24061 [Epub ahead of print]
Published online: April 3, 2024
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1Department of Neurology, Heundae Paik Hospital, Inje University College of Medicine, Busan, Korea
2Department of Neurology, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea
3Depratment of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
4Department of Neurology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
5Department of Neurology, Kyung Hee University Medical Hospital, Kyung Hee University College of Medicine, Seoul, Korea
6Department of Neurology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
7Department of Neurology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea
8Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
9Department of Neurology and Neuroscience Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
10Department of Neurology, Hallym University College of Medicine, Anyang, Korea
11Department of Neurology, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
12Department of Neurology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
13Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
14Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
15Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
16Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
17Department of Neurology, Gachon University Gil Meidcal Center, Gachon University College of Medicine, Incheon, Korea
18Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
19Department of Neurology, Pusan National University Yangsan Hospital, Yangsan, Korea
20Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
21Brainup Neurology Clinic, Daejeon, Korea
22Department of Neurology, Ewha Womans University Seoul Hospital, Ewha Womans University School of Medicine, Seoul, Korea
23Department of Neurology, Myungju Hospital, Yongin, Korea
24Department of Neurology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
25Department of Neurology, Bobath Memorial Hospital, Seongnam, Korea
26Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
27Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
28Department of Neurology, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea
29Department of Neurology, Soonchunhyang University Seoul Hospital, Soonchunhyang University School of Medicine, Seoul, Korea
30Department of Neurology, S Pohang Stroke and Spine Hospital, Pohang, Korea
31Department of Neurology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
32Department of Neurology, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Korea
33Department of Neurology, Seoul Now Hospital, Seongnam, Korea
Corresponding author:  Seong-Beom Koh, Tel: +82-2-2626-3169, Fax: +82-2-2626-1270, 
Email: parkinson@korea.ac.kr
Received: 8 March 2024   • Revised: 29 March 2024   • Accepted: 2 April 2024
Jinse Park and Eungseok Oh contributed equally to this study as co-first authors.

Objective
The Scales for Outcomes in Parkinson’s Disease–Cognition (SCOPA-Cog) was developed to assess cognition in patients with Parkinson’s disease (PD). In this study, we aimed to evaluate the validity and reliability of the Korean version of the SCOPACog (K-SCOPA-Cog).
Methods
We enrolled 129 PD patients with movement disorders from 31 clinics in South Korea. The original version of the SCOPA-Cog was translated into Korean using the translation-retranslation method. The test–retest method with an intraclass correlation coefficient (ICC) and Cronbach’s alpha coefficient were used to assess reliability. Spearman’s rank correlation analysis with the Montreal Cognitive Assessment-Korean version (MOCA-K) and the Korean Mini-Mental State Examination (K-MMSE) were used to assess concurrent validity.
Results
The Cronbach’s alpha coefficient was 0.797, and the ICC was 0.887. Spearman’s rank correlation analysis revealed a significant correlation with the K-MMSE and MOCA-K scores (r = 0.546 and r = 0.683, respectively).
Conclusion
Our results demonstrate that the K-SCOPA-Cog has good reliability and validity.

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