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Brief communication Evaluating the validity and reliability of the Korean version of Scales for Outcomes in Parkinson’s Disease–Cognition
Jinse Park1, Eung Seok Oh2, Seong-Beom Koh3corresp_icon, In-Uk Song4, Tae-Beom Ahn5, Sang Jin Kim6, Sang-Myung Cheon7, Yun Joong Kim8, Jin Whan Cho9, Hyeo-Il Ma10, Mee-Young Park11, Jong Sam Baik12, Phil Hyu Lee13, Sun Ju Chung14, Jong-Min Kim15, Han-Joon Kim16, Young-Hee Sung17, Do Young Kwon18, Jae-Hyeok Lee19, Jee-Young Lee20, Ji Sun Kim21, Ji Young Yun22, Hee Jin Kim23, Jin Young Hong24, Mi-Jung Kim25, Jinyoung Youn9, Ji Seon Kim26, Hui-Jun Yang27, Won Tae Yoon28, Sooyeoun You29, Kyum-Yil Kwon30, Su-Yun Lee31, Younsoo Kim9, Hee-Tae Kim32, Joong-Seok Kim4, Ji-Young Kim33

DOI: https://doi.org/10.14802/jmd.24061 [Accepted]
Published online: April 3, 2024
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1Department of Neurology, Heundae Paik Hospital, Inje University
2Depratment of Neurology, Chungnam National University, School of Medicine, Choungnam University Hospital
3Depratment of Neurology, Korea University Guro Hospital
4Department of Neurology, College of Medicine, The Catholic University of Korea
5Department of Neurology, Kyung Hee University College of Medicine
6Department of Neurology, Busan Paik Hospital, Inje University College of Medicine
7Department of Neurology, Dong-A University College of Medicine
8Department of Neurology, Youngin Severence Hospital
9Department of Neurology and Neuroscience Center, Samsung Medical Center, Sungkyunkwan University School of Medicine
10Department of Neurology, Hallym University College of Medicine
11Department of Neurology, Yeungnam University College of Medicine
12Department of Neurology, Sanggye Paik Hospital, Inje University College of Medicine
13Department of Neurology, Severance Hospital, Yonsei University College of Medicine
14Department of Neurology, Parkinson/Alzheimer Center, Asan Medical Center, University of Ulsan College of Medicine
15Department of Neurology, Seoul National University College of Medicine, Seoul National University Bundang Hospital
16Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine
17Department of Neurology, College of Medicine, Gachon University
18Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine
19Department of Neurology, Pusan National University Yangsan Hospital
20Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, College of Medicine, Seoul National University
21Brainup neurology clinic
22Department of Neurology, Ewha Womans University School of Medicine, Ewha Womans University Seoul Hospital
23Department of Neurology, Myungju Hospital
24Department of Neurology, Yonsei University Wonju College of Medicine
25Department of Neurology, Bobath Memorial Hospital
26Department of Neurology, Soonchunhyang University Seoul Hospital, Soonchunhyang University School of Medicine
27Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine
28Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
29Department of Neurology, Keimyung University School of Medicine
30Department of Neurology, Soonchunhyang University Gumi Hospital, Soonchunhyang University School of Medicine
31S Pohang stroke and spine hospital
32Department of Neurology, Hanyang University College of Medicine
33Department of Neurolgoy, Seoul Nowmedical
Corresponding author:  Seong-Beom Koh, Tel: +82-2-2626-3169, Fax: +82-8-2626-2249, 
Email: parkinson@korea.ac.kr
Received: 8 March 2024   • Revised: 29 March 2024   • Accepted: 2 April 2024
Jinse Park and Eung Seok 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 screen for cognition in PD. In this study, we aimed to evaluate the validity and reliability of the Korean version of the SCOPA-cog.
Methods
We recruited 129 PD patients from 31 clinics with movement disorders in South Korea. The original version of the SCOPA-cognition was translated into Korean using the translation-retranslation method. The test-rest method with an intraclass correlation coefficient (ICC) and Cronbach’s alpha coefficient were used to assess reliability. The Spearman’s Rank correlation analysis with Montreal Cognitive Assessment-Korean version (MOCA-K) and 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 showed a significant correlation with the K-MMSE and MOCA-K scores (r = 0.546 and r = 0.683, respectively).
Conclusions
Our results demonstrate that K-SCOPA-Cog exhibits good reliability and validity.

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JMD : Journal of Movement Disorders