Development of a Japanese Version of the Multiple Sclerosis Self-Management Scale-Revised

Abstract

Objective: This study aims to develop a Japanese version of the multiple sclerosis selfmanagement scale-revised (MSSM-R) developed in the United States and test its reliability and validity.Methods: A back-translation procedure was used to develop the Japanese version of the scale, a preliminary survey was conducted, and the primary survey was administered to 524 patients with multiple sclerosis. Reliability was examined for stability and internal consistency, and validity was examined for concurrent validity and construct validity.Result: The ICC for the stability of the test-retest conducted 2 weeks after the primary survey was 0.93. Overall, the Cronbach's α for the Japanese version of the MSSM-R was 0.85. The correlation coefficient with the external criteria scale was r = 0.64. An exploratory factor analysis revealed that the factor structure of the Japanese version of the MSSM-R was similar to that of the original version except for one item. The Japanese version of the MSSM-R had a goodness of fit of GFI = 0.84, AGFI = 0.80, CFI = 0.83, and RMSEA = 0.08. Conclusion:The overall reliability and validity of the Japanese version of the MSSM-R were confirmed, and this scale was deemed usable. However, as only one item in the international comparison differs from the original version in terms of factors, international comparisons of subscales should be approached with caution. 要 旨 目的：米国で開発された多発性硬化症セルフマネジメント尺度(MSSM-R)の日本語版を作成し，日 本語版尺度の信頼性と妥当性を検証する． 方法：逆翻訳の手順を踏んで日本語版尺度を作成し予備調査を実施後，MS 患者 524 名に対して本調 査を実施した．信頼性を安定性および内的整合性で検討し，妥当性を併存妥当性および構成概念妥当性 で検討した． 結果：本調査実施 2 週間後の再テスト法による安定性は ICC(1, 2)で 0.93 であった．MSSM-R 日本語 版尺度全体でクロンバック α 係数 0.85 であった．また，外的基準との相関は r = 0.64 であった．探索的 受付日：2022 年 11 月 30 日 受理日：2022 年 12 月 23 日