「患者安全のための医療事故防止行動自己評価尺度—看護師長用—」の開発

Development of a Self-Evaluation Scale of Medical Accident Prevention Behaviors for Head Nurses with the Aim of Ensuring Patient Safety

要旨

　目的：患者安全のための医療事故防止行動自己評価尺度—看護師長用—を開発する．

　方法：質的帰納的研究成果を基に質問項目の作成と尺度化を行った．尺度の検討会とパイロットスタディにより再構成した29項目の尺度を用いて全国調査を行った．尺度の信頼性と妥当性は，収集したデータを用いた項目分析，信頼性係数の算出など統計学的手法を用いて検証した．

　結果：看護師長1,154名に尺度を配布した．回収数672（回収率58.2％）のうち有効回答580を分析した．I-T（項目-全体）相関係数は.39から.64，尺度全体のクロンバックα係数は.91であった．既知グループ技法により，2仮説はそれぞれ支持された．再テスト法の相関係数は.85であった．主成分分析の結果は，第1成分に.37以上の負荷量を示した．寄与率は，28.3％であった．

　結論：患者安全のための医療事故防止行動自己評価尺度—看護師長用—29項目は，一定の信頼性と妥当性を有する．

　Purpose: To develop a “Self-Evaluation Scale of Medical Accident Prevention Behaviors for Head Nurses” with the aim of ensuring patient safety.

　Methods: The items of the scale were generated based on the result of a qualitative study. A national survey was conducted using a 29-item scale reconstructed by a panel of experts and a pilot study. The reliability and validity of the scale were verified by statistical methods using the collected data.

　Results: A total of 1,154 questionnaires were distributed, 672 (58.2%) questionnaires were returned, and 580 valid data sets were analyzed.

　The results of confirmation of the score distribution of the scale showed that there were no question items with a notable response concentrated on specific options. The item-total correlation coefficients ranged from .39 to .64. Cronbach's alpha of the scale was .91. The hypotheses which were used to evaluate construct validity by known-groups method were supported. The test-retest reliability was .85. The results of principal component analysis showed a loading of .37 or more for the first component. The contribution rate was 28.3%.

　Conclusion: The results support the fact that this 29-item scale has adequate reliability and validity.