軽症脳梗塞の高齢者を対象とした「再発に関するリスク認知尺度」および「再発に関する楽観性尺度」の開発

Development of a Recurrence Risk Perception Scale and a Recurrence Optimism Scale for Older Persons with Mild Ischemic Stroke

抄録

　本研究は，軽症脳梗塞の高齢者を対象に，再発という望ましくない，不確実な出来事に対する主観的な意味づけを測定する尺度を開発し，信頼性と妥当性を検証することを目的とした．先行研究とパイロットスタディから「再発に関するリスク認知尺度」および「再発に関する楽観性尺度」を作成し，入院中の軽症脳梗塞の高齢者101人を対象に無記名質問紙調査を実施した．項目分析，探索的因子分析の結果，「再発に関するリスク認知尺度」3因子12項目，「再発に関する楽観性尺度」3因子10項目が抽出された．「再発に関するリスク認知尺度」のCronbachのα係数は.88，「再発に関する楽観性尺度」のCronbachのα係数は.81，再テストによる級内相関係数は「再発に関するリスク認知尺度」は.85，「再発に関する楽観性尺度」は.48であった．基準関連妥当性の相関係数は「再発に関するリスク認知尺度」は.60，「再発に関する楽観性尺度」は−.38であった．以上より，2つの尺度は信頼性および妥当性が確認された．

　The purpose of this study was to develop a recurrence risk perception scale that measures subjective perceptions of how older adults with mild ischemic stroke perceive an undesirable uncertain event such as a recurrent ischemic stroke, along with their fears. Based on previous research, a Recurrence Risk Perception Scale consisting of 17 items and a Recurrence Optimism Scale consisting of 15 items were developed. Subsequently, to evaluate the reliability and validity of the scales, we conducted a questionnaire survey of 101 elderly patients (aged 65 years or older) with mild ischemic stroke who were hospitalized at 22 neurosurgical hospitals in Japan, using a random sampling method. An exploratory factor analysis identified 3 factors and 12 items for a “Recurrence Risk Perception Scale” and 3 factors and 10 items for a “Recurrence Optimism Scale” The Cronbach's alpha coefficient of the “Recurrence Risk Perception Scale” was 0.88, and that of the “Recurrence Optimism Scale” was 0.81. Retesting for stability resulted in an intraclass correlation (ICC) of .85 for the “Perceived Risk of Recurrence Scale” and an ICC of .48 for the “Recurrence Optimism Scale. Regarding criterion validity, the correlation coefficient between the “Recurrence Risk Perception Scale” and the UUIS was .60, and the correlation coefficient between the “Recurrence Optimism Scale” and the UUIS was -.38. The reliability and validity of the “Recurrence Risk Perception Scale” and the “Recurrence Optimism Scale” were thus confirmed.