Research Unit of Nursing Science, Campus Bio-Medico University of Rome, Rome, Italy.
Department of Public Health and Pediatrics, University of Turin, Turin, Italy.
Eval Health Prof. 2020 Mar;43(1):50-62. doi: 10.1177/0163278719856660. Epub 2019 Jun 17.
This study developed two instruments, the Self-Care in Chronic Obstructive Pulmonary Disease (COPD) Inventory (SC-COPDI) and the COPD-Self-Care Self-Efficacy Scale (SCES), and tested their psychometric properties on a convenience sample of 498 patients from Northern, Central, and Southern Italy. First, the domains and the items of the SC-SCOPDI were generated based on the middle-range theory of self-care of chronic illness, comprising the dimensions of self-care maintenance, self-care monitoring, and self-care management, and the SCES-COPD was developed accordingly. Second, we assessed the content validity of each scale. Third, we conducted a multicenter cross-sectional study to test their structural validity, convergent and discriminative validity, internal consistency, and test-retest reliability. The theoretical dimensions of the two instruments were confirmed through confirmatory factor analysis. Convergent validity was demonstrated by the correlation among the three self-care scales and the Self-Efficacy Scale, and discriminative validity by higher self-care scale scores in individuals with greater COPD severity and poorer health status. The global reliability index ranged from .78 to .92 for all scales. The intraclass correlation coefficients were higher than .70. Further studies are needed to confirm the psychometric properties of the two instruments in different COPD populations and countries to extend their use in clinical practice.
本研究开发了两种工具，即慢性阻塞性肺疾病（COPD）自我护理量表（SC-COPDI）和 COPD 自我护理自我效能量表（SCES），并在意大利北部、中部和南部的 498 名方便样本患者中测试了它们的心理测量特性。首先，根据慢性病自我护理的中程理论，生成了 SC-SCOPDI 的领域和项目，包括自我护理维持、自我护理监测和自我护理管理三个维度，并相应地开发了 SCES-COPD。其次，我们评估了每个量表的内容效度。第三，我们进行了一项多中心横断面研究，以测试它们的结构有效性、收敛和判别有效性、内部一致性和重测信度。通过验证性因子分析证实了两种工具的理论维度。通过三个自我护理量表与自我效能量表之间的相关性证明了收敛有效性，通过 COPD 严重程度较高和健康状况较差的个体的自我护理量表得分较高证明了判别有效性。所有量表的总体可靠性指数范围为.78 至.92。组内相关系数高于.70。需要进一步的研究来确认两种工具在不同 COPD 人群和国家中的心理测量特性，以扩展它们在临床实践中的应用。
